Quality evaluation method based on concrete with low water-binder ratio

Abstract

The invention relates to the field of building material detection, in particular to a quality evaluation method based on low-water-binder-ratio concrete, which comprises the following steps: acquiring a low-water-binder-ratio concrete sample, confirming a sample detection environment based on the low-water-binder-ratio concrete sample, performing cutting operation on the low-water-binder-ratio concrete sample by using a table-type cutting machine, and determining the quality of the low-water-binder-ratio concrete sample. Calculating an intensity value by using a drying tester and a burning tester; calculating a penetration value by using a penetration controller and a penetration tester; starting an ultrasonic sensor; calculating a loss value by using a sending voltage and a receiving voltage; and constructing a concrete quality evaluation model based on a regression analysis result, substituting the strength value, the permeation value and the hydration value into the concrete quality evaluation model to calculate an evaluation value, and completing quality evaluation of the concrete with the low water-binder ratio. According to the invention, the detection speed and accuracy of the low-water-binder-ratio concrete can be improved.

Description

Technical Field

[0001] The invention relates to a quality assessment method based on low water-cement ratio concrete, and belongs to the field of building material detection. Background Art

[0002] Low water-cement ratio concrete refers to high-performance concrete with a water-cement ratio of less than 0.35 in the concrete mix, that is, concrete with a relatively low mass ratio of water to cementitious materials. Due to its high strength and durability, it is widely used in various building structures. After concrete is put into construction, it may cause structural fatigue, reduced strength, and even safety hazards over time and changes in various environmental indicators. Therefore, accurate and comprehensive testing of low water-cement ratio concrete is of great significance to ensure the safety of buildings.

[0003] At present, the quality inspection of low water-cement ratio concrete is similar to that of conventional concrete, but due to its special performance requirements, some inspection methods may be more rigorous and detailed. The main inspections include compressive strength test and splitting tensile test.

[0004] Although the above method can realize the quality inspection of low water-cement ratio concrete, the quality assessment method mainly relies on long-term experiments with a long experimental cycle. In addition, the test results are single and cannot comprehensively evaluate the quality of concrete from all aspects, lacking systematicity. It cannot be applied to occasions where the construction period is short and comprehensive and accurate inspection is required. Summary of the invention

[0005] The present invention provides a quality assessment method based on low water-cement ratio concrete, the main purpose of which is to improve the quality assessment speed of low water-cement ratio concrete and integrate various data to make the detection result more accurate.

[0006] To achieve the above object, the present invention provides a quality assessment method based on low water-cement ratio concrete, comprising:

[0007] Obtain a low water-cement ratio concrete sample, and confirm a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor;

[0008] Using a pre-built desktop cutting machine to perform a cutting operation on the low water-binder ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size;

[0009] Using a drying tester and a first concrete sample to obtain the dried concrete and the dried mass, using a burning tester to test the dried concrete to obtain burning data, and using the dried mass and the burning data to calculate the strength value;

[0010] Using a permeability controller and a second concrete sample to obtain permeable concrete, using a permeability tester to test the permeable concrete, and obtaining permeability data, wherein the permeability data includes: permeable water volume, concrete volume, opening length, and opening end area, and using the permeability data to calculate a permeability value;

[0011] The ultrasonic sensor is started, wherein the ultrasonic sensor includes a transmitter and a receiver, and a preset test sound wave is emitted by the transmitter, wherein a transmission voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the transmission voltage and the receiving voltage, and a hydration value is calculated by the loss value;

[0012] The burning data, permeability data and loss values ​​are summarized to obtain a database, and a multivariate regression analysis is performed on the database using pre-built statistical software to obtain the regression analysis results. A concrete quality assessment model is constructed based on the regression analysis results, and the strength value, permeability value and hydration value are substituted into the concrete quality assessment model to calculate the assessment value, thus completing the quality assessment of low water-cement ratio concrete.

[0013] Optionally, obtaining a low water-cement ratio concrete sample and confirming a sample detection environment based on the low water-cement ratio concrete sample includes:

[0014] After obtaining the low water-cement ratio concrete sample, starting the conveyor belt;

[0015] When the conveyor belt is successfully started, the penetration controller, drying tester, burning tester, penetration tester and ultrasonic sensor are self-tested;

[0016] And when the self-test passes, the parameters of the drying tester, burning tester, penetration controller, penetration tester and ultrasonic sensor are set respectively until the parameters are set successfully, and a sample detection environment including a conveyor belt, drying tester, burning tester, penetration controller, penetration tester and ultrasonic sensor is obtained.

[0017] Optionally, the method of using a pre-built desktop cutting machine to perform a cutting operation on the low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample comprises:

[0018] Identify a sample cutting environment for cutting, wherein the sample cutting environment is composed of a desktop cutting machine, a flat-mouth vise, and a workbench;

[0019] After the low water-cement ratio concrete sample is fixed to the workbench by using the flat-mouth vise, a desktop cutting machine is used to perform a cutting operation on the fixed low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein the blade in the desktop cutting machine is preset to be a diamond blade.

[0020] Optionally, the step of obtaining the dried concrete and the dried quality by using a drying tester and a first concrete sample, and detecting the dried concrete by using a burning tester to obtain burning data includes:

[0021] Starting a drying tester, wherein the drying tester includes a ball mill, a vacuum dryer and a first electronic balance;

[0022] After the drying tester is started, the first concrete sample is crushed by a ball mill to obtain crushed concrete, the crushed concrete is dried by a vacuum dryer to obtain dried concrete, and the dried concrete is measured by a first electronic balance to obtain a drying mass;

[0023] Starting a burn tester, wherein the burn tester includes a burn furnace, a second electronic balance and an X-ray diffractometer;

[0024] After the burning tester is started up, the preset temperature gradient is input into the burning furnace, and the burning furnace after the temperature gradient is input is used to burn the dried concrete to obtain the burned concrete. The burned concrete is measured using a second electronic balance and an X-ray diffractometer to obtain the burning data, wherein the burning data includes the burning mass, the slag loss on burn and the cement loss on burn.

[0025] Optionally, the calculating the intensity value using the drying quality and burning data comprises:

[0026] The combined water content is calculated using the drying mass and ignition data. The calculation formula is as follows:

[0027]

[0028] Among them, W CH is the combined water content, m0 is the drying mass, m1 is the burning mass in the burning data, and m k is the slag loss on ignition in the ignition data, m s It is the cement loss on ignition in the ignition data;

[0029] The strength value is calculated using the bound water content using the following formula:

[0030]

[0031] Among them, f c is the intensity value, T is the current thermodynamic temperature, T0 is the preset thermodynamic temperature, and γ is the preset intensity coefficient.

[0032] Optionally, the method of obtaining permeable concrete by using the permeability controller and the second concrete sample, and detecting the permeable concrete by using a permeability tester to obtain permeability data includes:

[0033] Starting an osmotic controller, wherein the osmotic controller includes a pressure volume controller, a pressure chamber and a vacuum suction cup;

[0034] After the infiltration controller is started, the second concrete sample is fixed to the pressure chamber by using a vacuum suction cup, and then the infiltration pressure is applied to the fixed second concrete sample by using a pressure volume controller to obtain infiltration concrete, wherein the infiltration concrete is composed of a concrete frame and infiltration openings;

[0035] Starting a penetration tester, wherein the penetration tester includes a high-pressure water gun, an optical ruler and a water measuring device, wherein the water pressure of the high-pressure water gun is preset;

[0036] After the penetration tester is started, the high-pressure water gun is used to inject water into the penetration opening of the permeable concrete until the water flow in the high-pressure water gun penetrates the penetration opening, and then the high-pressure water gun is turned off, and the amount of permeated water is obtained by using a water meter, wherein the amount of permeated water is the amount of water flowing through the permeable opening;

[0037] The time of starting the high-pressure water gun is taken as the starting time, the time of water flow penetrating the penetration opening is taken as the ending time, and the penetration time is obtained using the starting time and the ending time;

[0038] The optical ruler and concrete frame are used to obtain the concrete volume, opening length and opening end area, wherein the infiltration data includes: infiltration water volume, concrete volume, opening length and opening end area.

[0039] Optionally, the permeability value is calculated using the permeability data, and the calculation formula is:

[0040]

[0041] Where K(l) is the permeability value, Q is the amount of permeable water in the permeability data, l0 is the length of the opening in the permeability data, V0 is the concrete volume in the permeability data, S0 is the end area of ​​the opening in the permeability data, p is the water pressure of the high-pressure water gun, t is the permeability time, l is the distance from the starting point of the permeable opening, and the maximum value of l will not exceed l0.

[0042] Optionally, calculating the loss value by using the transmission voltage and the reception voltage, and calculating the hydration value by using the loss value, includes:

[0043] The loss value is calculated using the transmit voltage and receive voltage. The calculation formula is as follows:

[0044]

[0045] Among them, u c is the loss value, U1 is the sending voltage, and U2 is the receiving voltage;

[0046] The hydration value is calculated by the loss value, and the calculation formula is as follows:

[0047]

[0048] Among them, μ c is the hydration value, α is the preset hydration coefficient, and e represents the natural constant.

[0049] Optionally, the quality assessment model is as follows:

[0050] A c =a1f c +a2μ c -a3K(l)+b

[0051] Among them, A c is the evaluation value, a1, a2, a3 are all weight coefficients, and b is a constant term.

[0052] To achieve the above object, the present invention also provides a quality assessment system based on low water-cement ratio concrete, comprising:

[0053] A concrete sample processing module is used to obtain a low water-cement ratio concrete sample, and to confirm a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor; and to perform a cutting operation on the low water-cement ratio concrete sample using a pre-built desktop cutting machine to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size;

[0054] The strength data analysis module uses the permeability controller and the second concrete sample to obtain permeable concrete, uses the permeability tester to detect the permeable concrete, and obtains permeability data, wherein the permeability data includes: permeation water volume, concrete volume, opening length and opening end area, and uses the permeability data to calculate the permeability value;

[0055] A permeability data analysis module, using a permeability controller and a second concrete sample to obtain permeable concrete, using a permeability tester to detect the permeable concrete, and obtaining permeability data, wherein the permeability data includes: permeable water volume, concrete volume, opening length and opening end area, and using the permeability data to calculate the permeability value;

[0056] The hydration data analysis module starts the ultrasonic sensor, wherein the ultrasonic sensor includes a transmitter and a receiver, and uses the transmitter to transmit a preset test sound wave, wherein a transmission voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the transmission voltage and the receiving voltage, and the hydration value is calculated by the loss value;

[0057] The data result integration module is used to summarize the burning data, penetration data and loss values ​​to obtain a database, use pre-built statistical software to perform multivariate regression analysis on the database, obtain regression analysis results, build a concrete quality assessment model based on the regression analysis results, substitute the strength value, penetration value and hydration value into the concrete quality assessment model to calculate the assessment value, and complete the quality assessment of low water-cement ratio concrete.

[0058] In order to solve the above problem, the present invention further provides an electronic device, the electronic device comprising:

[0059] a memory storing at least one instruction; and

[0060] The processor executes the instructions stored in the memory to implement the quality assessment method based on low water-cement ratio concrete as described above.

[0061] In order to solve the above problems, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored. The at least one instruction is executed by a processor in an electronic device to implement the above-mentioned quality assessment method based on low water-cement ratio concrete.

[0062] The present invention is to solve the problem described in the background technology. The present invention obtains a low water-cement ratio concrete sample and confirms a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester and an ultrasonic sensor. By constructing a complete sample detection environment, it is ensured that all test equipment runs smoothly, and a systematic detection environment is provided for subsequent efficient detection, so that a variety of test data can be collected in the same environment and integrated at the same time after the results are obtained, thereby improving the detection efficiency; a pre-built desktop cutting machine is used to perform a cutting operation on the low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample and a third concrete sample, wherein each concrete sample has the same shape and size. Since the concrete sample is divided into multiple samples during cutting and sent to different detectors for detection, more parameters of the low water-cement ratio concrete sample are obtained, more comprehensive data are obtained, and the shape and size of the concrete sample are kept consistent, thereby ensuring the consistency of the sample and improving the reliability and comparability of the test results; the drying tester and the first concrete sample are used to obtain the dried concrete and the dried mass, the burning tester is used to detect the dried concrete, the burning data is obtained, and the drying mass and The strength value is calculated by burning data. The bound water content of the first concrete sample is quickly obtained through drying and burning tests. The strength value is then calculated by the bound water content, which can replace the compressive strength test in long-term experiments and effectively shorten the evaluation time. The permeable concrete is obtained by using the permeability controller and the second concrete sample. The permeable concrete is tested by the permeability tester to obtain the permeability data, where the permeability data includes: the amount of permeated water, the volume of concrete, the length of the opening and the area at the end of the opening. The permeability value is calculated by using the permeability data. The permeability tester accelerates the permeation process by applying more water pressure, and the permeability value can be quickly obtained. Compared with the impermeability In the detection experiment, the slow penetration treatment of concrete is carried out, and the penetration process of the present invention is faster, which effectively shortens the evaluation time; the ultrasonic sensor is started, wherein the ultrasonic sensor includes a transmitter and a receiver, and a preset test sound wave is emitted by the transmitter, wherein the sending voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the sending voltage and the receiving voltage, and a hydration value is calculated by the loss value, and the loss value of the ultrasonic wave is converted into a hydration value by measuring, which can replace the anti-permeability detection in the long-term experiment, and effectively shorten the evaluation time;The burning data, permeability data and loss values ​​are summarized to obtain a database, and a pre-built statistical software is used to perform a multiple regression analysis on the database to obtain the regression analysis results. A concrete quality assessment model is constructed based on the regression analysis results, and the strength value, permeability value and hydration value are substituted into the concrete quality assessment model to calculate the assessment value, and the quality assessment of low water-cement ratio concrete is completed. The previous test data are integrated through multiple regression analysis, and a quality assessment model is established to make the obtained assessment value more systematic and comprehensive, and can more accurately reflect the quality of low water-cement ratio concrete. Therefore, the main purpose of the present invention is to improve the quality assessment speed of low water-cement ratio concrete, and integrate various data to make the test results more accurate. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A schematic flow chart of a quality assessment method based on low water-cement ratio concrete provided by one embodiment of the present invention;

[0064] Figure 2 A functional module diagram of a quality assessment system based on low water-cement ratio concrete provided by an embodiment of the present invention;

[0065] Figure 3 A schematic structural diagram of an electronic device for implementing the quality assessment method based on low water-cement ratio concrete provided by an embodiment of the present invention.

[0066] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0067] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0068] The embodiment of the present application provides a quality assessment method based on low water-cement ratio concrete. The execution subject of the quality assessment method based on low water-cement ratio concrete includes but is not limited to at least one of the electronic devices such as a server and a terminal that can be configured to execute the method provided in the embodiment of the present application. In other words, the quality assessment method based on low water-cement ratio concrete can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc.

[0069] Reference Figure 1 FIG. 1 is a flow chart of a quality assessment method based on low water-cement ratio concrete provided by an embodiment of the present invention. In this embodiment, the quality assessment method based on low water-cement ratio concrete includes:

[0070] S1. Obtain a low water-cement ratio concrete sample, and confirm a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor.

[0071] It should be explained that the low water-cement ratio concrete sample comes from a construction site. For example, Xiao Zhang is a concrete tester at a construction site. The construction site has produced a batch of low water-cement ratio concrete. In order to evaluate the quality of this batch of low water-cement ratio concrete, Xiao Zhang obtains a low water-cement ratio concrete sample for testing.

[0072] In the embodiment of the present invention, the environment for testing low water-cement ratio concrete samples is a sample testing environment, and the sample testing environment includes a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor.

[0073] It should be explained that the main function of the conveyor belt is to connect the drying tester, the burning tester, the penetration controller, the penetration tester and the ultrasonic sensor to ensure that each concrete sample can be transferred between the devices. For the specific application of the drying tester, the burning tester, the penetration controller, the penetration tester and the ultrasonic sensor, please refer to the subsequent embodiments.

[0074] Furthermore, the obtaining of the low water-binder ratio concrete sample and determining the sample detection environment based on the low water-binder ratio concrete sample includes:

[0075] After obtaining the low water-cement ratio concrete sample, starting the conveyor belt;

[0076] When the conveyor belt is successfully started, the penetration controller, drying tester, burning tester, penetration tester and ultrasonic sensor are self-tested;

[0077] And when the self-test passes, the parameters of the drying tester, burning tester, penetration controller, penetration tester and ultrasonic sensor are set respectively until the parameters are set successfully, and a sample detection environment including a conveyor belt, drying tester, burning tester, penetration controller, penetration tester and ultrasonic sensor is obtained.

[0078] For example, after Xiao Zhao obtains the low water-cement ratio concrete sample, Xiao Zhao starts the conveyor belt and sets parameters such as the operating time and operating temperature of the penetration controller, drying tester, burning tester, penetration tester and ultrasonic sensor to values ​​suitable for the environmental factors according to the current environmental factors, such as temperature and humidity. After the setting is successful, each device is connected through the conveyor belt and starts to operate, successfully running the sample detection environment.

[0079] S2. Using a pre-built desktop cutting machine to perform a cutting operation on the low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size.

[0080] In detail, the method of using a pre-built desktop cutting machine to perform a cutting operation on a low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample includes:

[0081] Identify a sample cutting environment for cutting, wherein the sample cutting environment is composed of a desktop cutting machine, a flat-mouth vise, and a workbench;

[0082] After the low water-cement ratio concrete sample is fixed to the workbench by using the flat-mouth vise, a desktop cutting machine is used to perform a cutting operation on the fixed low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein the blade in the desktop cutting machine is preset to be a diamond blade.

[0083] It should be explained that a tabletop cutting machine is a cutting device that integrates high speed, precision and miniaturization, and the blade used is a diamond blade. A flat-nose vise is a general machine tool accessory that is used with a workbench to fix, clamp and position the workpiece during processing.

[0084] Exemplarily, a flat-jaw vise is used to locate the cutting position during cutting, and cutting is started from the trisection point of a certain side of the low water-cement ratio concrete sample, ensuring that the three concrete samples obtained by cutting have the same shape and size.

[0085] S3. Obtain the dried concrete and the dried mass using a drying tester and the first concrete sample, test the dried concrete using a burning tester to obtain burning data, and calculate the strength value using the drying mass and the burning data.

[0086] In detail, the method of obtaining the dried concrete and the dried quality by using the drying tester and the first concrete sample, and detecting the dried concrete by using the burning tester to obtain the burning data includes:

[0087] Starting a drying tester, wherein the drying tester includes a ball mill, a vacuum dryer and a first electronic balance;

[0088] After the drying tester is started, the first concrete sample is crushed by a ball mill to obtain crushed concrete, the crushed concrete is dried by a vacuum dryer to obtain dried concrete, and the dried concrete is measured by a first electronic balance to obtain a drying mass;

[0089] Starting a burn tester, wherein the burn tester includes a burn furnace, a second electronic balance and an X-ray diffractometer;

[0090] After the burning tester is started up, the preset temperature gradient is input into the burning furnace, and the burning furnace after the temperature gradient is input is used to burn the dried concrete to obtain the burned concrete. The burned concrete is measured using a second electronic balance and an X-ray diffractometer to obtain the burning data, wherein the burning data includes the burning mass, the slag loss on burn and the cement loss on burn.

[0091] It is understood that the drying tester is a comprehensive detection instrument including a ball mill, a vacuum dryer and a first electronic balance. The burning detector is a comprehensive detection instrument including a burning furnace, a second electronic balance and an X-ray diffractometer.

[0092] For example, in the comprehensive testing instrument, the first concrete sample is sent to the ball mill for crushing, and then sent to the vacuum dryer through a conveyor belt. After being dried in the vacuum dryer, it is sent to the electronic balance for testing. After the drying quality is obtained, the test of the drying tester is completed. Then, the dried concrete is sent to the next testing line through a conveyor belt and enters the burning furnace for burning. After the burning is completed, it is sent to the second electronic balance and X-ray diffractometer for measurement to obtain the burning data and complete the test of the burning detector.

[0093] It should be explained that a ball mill is a device for crushing the first concrete sample. The cylinder is made of steel plate and fixed with a steel liner. The ball mill has a built-in grinding body, which is generally a steel ball and is loaded into the cylinder according to different diameters and a certain ratio. The first concrete sample is loaded into the cylinder through the hollow shaft at the feeding end of the ball mill. When the cylinder of the ball mill rotates, the grinding body, due to inertia, centrifugal force and friction, causes the first concrete sample to be attached to the cylinder liner and carried away by the cylinder. When it is brought to a certain height, it is thrown down due to its own gravity. The falling grinding body crushes the material in the cylinder like a projectile. A vacuum dryer is a device for drying under negative pressure. The material is first placed in a vacuum state in a closed interlayer, and then a heat energy source, such as hot water, low-pressure steam or heat transfer oil, is introduced into the vacuum dryer. The heat is transferred to the crushed concrete through the inner shell. The crushed concrete refers to the crushed first concrete sample. The drop in steam pressure in the vacuum dryer causes the moisture on the surface of the crushed concrete to reach a saturated state and evaporate, and is promptly discharged and recovered by the vacuum pump. The moisture inside the crushed concrete continuously penetrates to the surface, evaporates and is discharged, and the three processes are continuously carried out, so that the crushed concrete is dried in a very short time. An electronic balance is a device for weighing the mass of an object, and the first electronic balance is built into a drying tester, and the second electronic balance is built into a burning tester. A burning furnace is a furnace that can perform high-temperature burning on dried concrete at a set temperature. An X-ray diffractometer is a device that uses the principle of diffraction to accurately measure the components and contents of various concretes.

[0094] For example, after the total mass of the burnt concrete is measured by a second electronic balance, it is then sent to an X-ray diffractometer for testing. By testing the content of each component of slag and cement in the burnt concrete, the mass of each component is calculated by the total mass and the content of each component, and compared with the preset mass of each component, the slag ignition loss and cement ignition loss can be calculated. The preset mass of each component is the mass of cement and slag set when making a low water-cement ratio concrete sample.

[0095] Further, the calculation of the intensity value using the drying quality and burning data includes:

[0096] The combined water content is calculated using the drying mass and ignition data. The calculation formula is as follows:

[0097]

[0098] Among them, W CH is the combined water content, m0 is the drying mass, m1 is the burning mass in the burning data, and m k is the slag loss on ignition in the ignition data, m s It is the cement loss on ignition in the ignition data;

[0099] The strength value is calculated using the bound water content using the following formula:

[0100]

[0101] Among them, f c is the intensity value, T is the current thermodynamic temperature, T0 is the preset thermodynamic temperature, and γ is the preset intensity coefficient.

[0102] It should be explained that the drying mass is the mass of the first concrete sample after drying, the burning mass in the burning data refers to the mass of the dried concrete after burning, the slag loss on burning in the burning data refers to the mass lost by the slag during the high-temperature burning process, and the cement loss on burning in the burning data refers to the mass lost by the cement during the high-temperature burning process.

[0103] Importantly, the strength value is a value that reflects the compressive strength of low water-cement ratio concrete. The higher the strength value, the higher the compressive strength. It is known from the prior art that the bound water content of low water-cement ratio concrete is positively correlated with the compressive strength, and the compressive strength is positively correlated with the strength value, so the strength value can be calculated by the bound water content. The current thermodynamic temperature value refers to the thermodynamic temperature value in the current environment. For example, the current ambient temperature is 25°C, and the corresponding current thermodynamic temperature value is 298.15 Kelvin. The preset thermodynamic temperature and the preset strength coefficient are determined by the parameters of low water-cement ratio concrete, such as water-cement ratio, component content, etc.

[0104] S4. Use the permeability controller and the second concrete sample to obtain permeable concrete, use the permeability tester to test the permeable concrete, and obtain permeability data, wherein the permeability data includes the amount of permeated water, the volume of concrete, the length of the opening, and the area of ​​the end of the opening, and use the permeability data to calculate the permeability value.

[0105] In detail, the method of obtaining permeable concrete by using the permeability controller and the second concrete sample, and detecting the permeable concrete by using the permeability tester to obtain permeability data includes:

[0106] Starting an osmotic controller, wherein the osmotic controller includes a pressure volume controller, a pressure chamber and a vacuum suction cup;

[0107] After the infiltration controller is started, the second concrete sample is fixed to the pressure chamber by using a vacuum suction cup, and then the infiltration pressure is applied to the fixed second concrete sample by using a pressure volume controller to obtain infiltration concrete, wherein the infiltration concrete is composed of a concrete frame and infiltration openings;

[0108] Starting a penetration tester, wherein the penetration tester includes a high-pressure water gun, an optical ruler and a water measuring device, wherein the water pressure of the high-pressure water gun is preset;

[0109] After the penetration tester is started, the high-pressure water gun is used to inject water into the penetration opening of the permeable concrete until the water flow in the high-pressure water gun penetrates the penetration opening, and then the high-pressure water gun is turned off, and the amount of permeated water is obtained by using a water meter, wherein the amount of permeated water is the amount of water flowing through the permeable opening;

[0110] The time of starting the high-pressure water gun is taken as the starting time, the time of water flow penetrating the penetration opening is taken as the ending time, and the penetration time is obtained using the starting time and the ending time;

[0111] The optical ruler and concrete frame are used to obtain the concrete volume, opening length and opening end area, wherein the infiltration data includes: infiltration water volume, concrete volume, opening length and opening end area.

[0112] It should be explained that the water injection operation refers to the operation of injecting high-pressure water into the permeation opening. The permeation time refers to the time difference between the start time and the end time. For example, if the start time is 10:00 and the end time is 10:30, the permeation time is 30 minutes.

[0113] It is understandable that the pressure volume controller is a device with an input end connected to a water pipe and an output end outputting water flow to the outside, and the water pressure of the output water flow is set by the microcontroller inside it, wherein the microcontroller setting the water pressure of the output water flow is a prior art. The pressure chamber is a container that can withstand high pressure and is used to place the second concrete sample. The vacuum suction cup is a vacuum equipment actuator. The penetration pressure refers to the water pressure output by the pressure volume controller to the second concrete sample. Permeable concrete refers to concrete that is penetrated by water after the penetration pressure acts.

[0114] Exemplarily, when the pressure-volume controller continuously applies penetration pressure to the second concrete sample, the second concrete sample will be gradually penetrated by water under the continuous high pressure of water, cracking and forming cracks. These cracks extend from the top to the bottom of the concrete like tiny pipes. The tiny pipes formed are penetration openings, and the concrete frame refers to the rest of the penetration concrete excluding the penetration openings.

[0115] It should be explained that the high-pressure water gun can generate high-pressure water by using a power device to make a high-pressure plunger pump. A water meter is an instrument that records the amount of permeated water. Optionally, a turbine flow meter can be used as a water meter. An optical ruler is a device that uses the moiré fringes of a grating and photoelectric conversion technology to measure the length of an object and output a signal.

[0116] For example, an optical ruler is used to align the upper and lower ends of the penetration opening, and the distance between the two ends is measured as the length of the opening. Then the diameter of the end of the opening is measured. Since the end of the opening is approximately a circle, the area of ​​the end of the opening can be calculated using the diameter. The optical ruler is then used to measure the length, width, and height of the concrete frame to calculate the concrete volume.

[0117] Furthermore, the permeability value is calculated using the permeability data, and the calculation formula is:

[0118]

[0119] Where K(l) is the permeability value, Q is the amount of permeable water in the permeability data, l0 is the length of the opening in the permeability data, V0 is the concrete volume in the permeability data, S0 is the end area of ​​the opening in the permeability data, p is the water pressure of the high-pressure water gun, t is the permeability time, l is the distance from the starting point of the permeable opening, and the maximum value of l will not exceed l0.

[0120] Importantly, the permeability value is a value that reflects the impermeability of low water-binder ratio concrete, and the higher the permeability value, the lower the impermeability.

[0121] S5. Start the ultrasonic sensor, wherein the ultrasonic sensor includes a transmitter and a receiver. The transmitter is used to transmit a preset test sound wave, wherein a sending voltage of the test sound wave is preset. After the test sound wave passes through the third concrete sample, a transmission sound wave is obtained. The receiver and the transmission sound wave are used to obtain a receiving voltage. The transmission voltage and the receiving voltage are used to calculate the loss value, and the hydration value is calculated according to the loss value.

[0122] It is understood that the ultrasonic sensor is a device including a piezoelectric chip, which can convert voltage energy into ultrasonic waves for transmission, and can also receive ultrasonic waves and convert the received sound wave energy into voltage. The test sound wave refers to the sound wave emitted by the ultrasonic sensor for passing through the third concrete sample. The transmission sound wave refers to the test sound wave after energy attenuation.

[0123] Exemplarily, the ultrasonic sensor transmits ultrasonic waves from a transmitter according to a preset transmitting voltage, and uses the ultrasonic waves as test sound waves. When the test sound waves pass through the third concrete sample, the energy of the sound waves will be lost during the penetration process, and the transmitted sound waves will be received by the receiver of the ultrasonic sensor. When the receiver receives the transmitted sound waves, it will convert the energy of the received transmitted sound waves into voltage output, and use the output voltage as the receiving voltage.

[0124] Specifically, the method of calculating the loss value by using the transmission voltage and the reception voltage, and calculating the hydration value by using the loss value, includes:

[0125] The loss value is calculated using the transmit voltage and receive voltage. The calculation formula is as follows:

[0126]

[0127] Among them, u c is the loss value, U1 is the sending voltage, and U2 is the receiving voltage;

[0128] The hydration value is calculated by the loss value, and the calculation formula is as follows:

[0129]

[0130] Among them, μ c is the hydration value, α is the preset hydration coefficient, and e represents the natural constant.

[0131] Importantly, the loss value is the ratio of energy lost by the ultrasonic wave when passing through the third concrete sample. The hydration value is a value that reflects the degree of hydration of low water-cement ratio concrete. The higher the hydration value, the higher the degree of hydration. It is known from the prior art that the loss value of the ultrasonic wave after passing through the concrete is positively correlated with the hydration strength of the low water-cement ratio concrete. For example, as the degree of hydration increases, the porosity decreases, and the material of the third concrete sample becomes denser, making it more difficult for the ultrasonic wave to penetrate, and the loss value is higher. The hydration strength is positively correlated with the hydration value, so the hydration value can be calculated from the loss value. The preset hydration coefficient is determined by the parameters of the low water-cement ratio concrete, such as water-cement ratio, component content, etc.

[0132] S6. Summarize the burning data, penetration data and loss values ​​to obtain a database, use pre-built statistical software to perform multivariate regression analysis on the database, obtain regression analysis results, build a concrete quality assessment model based on the regression analysis results, substitute the strength value, penetration value and hydration value into the concrete quality assessment model to calculate the assessment value, and complete the quality assessment of low water-cement ratio concrete.

[0133] In detail, the quality assessment model is as follows:

[0134] A c =a1f c +a2μ c -a3K(l)+b

[0135] Among them, A c is the evaluation value, a1, a2, a3 are all weight coefficients, and b is a constant term.

[0136] It is understood that multiple regression analysis is a statistical method used to study the relationship between multiple independent variables and a dependent variable. A model is constructed to predict the value of the dependent variable, determine which independent variables have a significant impact on the dependent variable, and confirm the magnitude and direction of these impacts. The quality assessment model is a calculation formula that takes strength value, permeability value, and hydration value as independent variables and the assessment value as the dependent variable. The higher the assessment value, the better the quality of low water-cement ratio concrete.

[0137] For example, after testing multiple groups of low water-cement ratio concrete, Xiao Zhao obtained multiple groups of burning data, permeability data and loss values, entered these data into the computer and saved them in the database, used Python to program a statistical software, took the burning data, permeability data and loss values ​​in the database as independent variables, and took the evaluation value as the dependent variable, performed multiple regression analysis, and confirmed the weight coefficients b1, b2, b3 of these independent variables on the dependent variable, and then compared the relationship between the burning data, permeability data, loss value and the strength value, permeability value and hydration value, confirmed the weight coefficients a1, a2, a3 and the constant term b that affect the strength value, permeability value and hydration value, and constructed a concrete quality assessment model.

[0138] It should be understood that the pre-built statistical software is programmed by Python, and using Python to program a statistical software and perform multiple regression analysis is a prior art and will not be described in detail here.

[0139] The present invention is to solve the problem described in the background technology. The present invention obtains a low water-cement ratio concrete sample and confirms a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester and an ultrasonic sensor. By constructing a complete sample detection environment, it is ensured that all test equipment runs smoothly, and a systematic detection environment is provided for subsequent efficient detection, so that a variety of test data can be collected in the same environment and integrated at the same time after the results are obtained, thereby improving the detection efficiency; a pre-built desktop cutting machine is used to perform a cutting operation on the low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample and a third concrete sample, wherein each concrete sample has the same shape and size. Since the concrete sample is divided into multiple samples during cutting and sent to different detectors for detection, more parameters of the low water-cement ratio concrete sample are obtained, more comprehensive data are obtained, and the shape and size of the concrete sample are kept consistent, thereby ensuring the consistency of the sample and improving the reliability and comparability of the test results; the drying tester and the first concrete sample are used to obtain the dried concrete and the dried mass, the burning tester is used to detect the dried concrete, and the burning data is obtained, and the drying mass and The strength value is calculated by burning data. The bound water content of the first concrete sample is quickly obtained through drying and burning tests. The strength value is then calculated by the bound water content, which can replace the compressive strength test in long-term experiments and effectively shorten the evaluation time. The permeable concrete is obtained by using the permeability controller and the second concrete sample. The permeable concrete is tested by the permeability tester to obtain the permeability data, where the permeability data includes: the amount of permeated water, the volume of concrete, the length of the opening and the area at the end of the opening. The permeability value is calculated by using the permeability data. The permeability tester accelerates the permeation process by applying more water pressure, and the permeability value can be quickly obtained. Compared with the impermeability In the detection experiment, the slow penetration treatment of concrete is carried out, and the penetration process of the present invention is faster, which effectively shortens the evaluation time; the ultrasonic sensor is started, wherein the ultrasonic sensor includes a transmitter and a receiver, and a preset test sound wave is emitted by the transmitter, wherein the sending voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the sending voltage and the receiving voltage, and a hydration value is calculated by the loss value, and the loss value of the ultrasonic wave is converted into a hydration value by measuring, which can replace the anti-permeability detection in the long-term experiment, and effectively shorten the evaluation time;The burning data, permeability data and loss values ​​are summarized to obtain a database, and a pre-built statistical software is used to perform a multiple regression analysis on the database to obtain the regression analysis results. A concrete quality assessment model is constructed based on the regression analysis results, and the strength value, permeability value and hydration value are substituted into the concrete quality assessment model to calculate the assessment value, and the quality assessment of low water-cement ratio concrete is completed. The previous test data are integrated through multiple regression analysis, and a quality assessment model is established to make the obtained assessment value more systematic and comprehensive, and can more accurately reflect the quality of low water-cement ratio concrete. Therefore, the main purpose of the present invention is to improve the quality assessment speed of low water-cement ratio concrete, and integrate various data to make the test results more accurate. ;

[0140] like Figure 2 , which is a functional module diagram of a quality assessment system based on low water-cement ratio concrete provided by one embodiment of the present invention.

[0141] The quality assessment system 100 based on low water-cement ratio concrete of the present invention can be installed in an electronic device. According to the functions to be implemented, the quality assessment system 100 based on low water-cement ratio concrete can include a concrete sample processing module 101, a strength data analysis module 102, a permeability data analysis module 103, a hydration data analysis module 104 and a data result integration module 105. The module of the present invention can also be called a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[0142] The concrete sample processing module 101 is used to obtain a low water-binder ratio concrete sample, and to identify a sample detection environment based on the low water-binder ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor; and to perform a cutting operation on the low water-binder ratio concrete sample using a pre-built desktop cutting machine to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size;

[0143] The strength data analysis module 102 uses the permeability controller and the second concrete sample to obtain permeable concrete, uses the permeability tester to test the permeable concrete, and obtains permeability data, wherein the permeability data includes: permeation water volume, concrete volume, opening length and opening end area, and uses the permeability data to calculate the permeability value;

[0144] The permeability data analysis module 103 uses the permeability controller and the second concrete sample to obtain permeable concrete, uses the permeability tester to test the permeable concrete, and obtains permeability data, wherein the permeability data includes: permeation water volume, concrete volume, opening length and opening end area, and uses the permeability data to calculate the permeability value;

[0145] The hydration data analysis module 104 starts an ultrasonic sensor, wherein the ultrasonic sensor includes a transmitter and a receiver, and uses the transmitter to transmit a preset test sound wave, wherein a transmission voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the transmission voltage and the receiving voltage, and the hydration value is calculated by the loss value;

[0146] The data result integration module 105 is used to summarize the burning data, permeability data and loss values ​​to obtain a database, use pre-built statistical software to perform multivariate regression analysis on the database to obtain regression analysis results, build a concrete quality assessment model based on the regression analysis results, substitute the strength value, permeability value and hydration value into the concrete quality assessment model to calculate the assessment value, and complete the quality assessment of low water-cement ratio concrete.

[0147] In detail, each module in the quality assessment system 100 based on low water-cement ratio concrete in the embodiment of the present invention is used in the same manner as described above. Figure 1 The quality assessment method based on low water-cement ratio concrete described in the article is the same as the technical means and can produce the same technical effects, so I will not go into details here.

[0148] like Figure 3 , which is a schematic diagram of the structure of an electronic device for implementing a quality assessment method based on low water-cement ratio concrete provided by an embodiment of the present invention.

[0149] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a quality assessment method program based on low water-cement ratio concrete.

[0150] The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a mobile hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a magnetic memory, a disk, an optical disk, etc. The memory 11 may be an internal storage unit of the electronic device 1 in some embodiments, such as a mobile hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 1. Further, the memory 11 also includes an internal storage unit of the electronic device 1 and an external storage device. The memory 11 may be used not only to store application software and various types of data installed in the electronic device 1, such as the code of the quality assessment method program based on low water-cement ratio concrete, but also to temporarily store data that has been output or is to be output.

[0151] The processor 10 may be composed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips, etc. The processor 10 is the control core (Control Unit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and runs or executes programs or modules (such as a quality assessment method program based on low water-cement ratio concrete, etc.) stored in the memory 11, and calls data stored in the memory 11 to execute various functions of the electronic device 1 and process data.

[0152] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize connection and communication between the memory 11 and at least one processor 10, etc.

[0153] Figure 3 Only an electronic device with components is shown, and those skilled in the art will understand that Figure 3The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0154] For example, although not shown, the electronic device 1 may also include a power source (such as a battery) for supplying power to various components. Preferably, the power source may be logically connected to the at least one processor 10 using a power management device, so that the power management device is used to implement functions such as charging management, discharging management, and power consumption management. The power source may also include any components such as one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, and power status indicators. The electronic device 1 may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0155] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0156] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), or a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode) touch device. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device 1 and to display a visual user interface.

[0157] It should be understood that the embodiment is for illustration only and the scope of the patent application is not limited to this structure.

[0158] The quality assessment method program based on low water-cement ratio concrete stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can achieve:

[0159] Obtain a low water-cement ratio concrete sample, and confirm a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor;

[0160] Using a pre-built desktop cutting machine to perform a cutting operation on the low water-binder ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size;

[0161] Using a drying tester and a first concrete sample to obtain the dried concrete and the dried mass, using a burning tester to test the dried concrete to obtain burning data, and using the dried mass and the burning data to calculate the strength value;

[0162] Using a permeability controller and a second concrete sample to obtain permeable concrete, using a permeability tester to test the permeable concrete, and obtaining permeability data, wherein the permeability data includes: permeable water volume, concrete volume, opening length, and opening end area, and using the permeability data to calculate a permeability value;

[0163] The ultrasonic sensor is started, wherein the ultrasonic sensor includes a transmitter and a receiver, and a preset test sound wave is emitted by the transmitter, wherein a transmission voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the transmission voltage and the receiving voltage, and a hydration value is calculated by the loss value;

[0164] The burning data, permeability data and loss values ​​are summarized to obtain a database, and a multivariate regression analysis is performed on the database using pre-built statistical software to obtain the regression analysis results. A concrete quality assessment model is constructed based on the regression analysis results, and the strength value, permeability value and hydration value are substituted into the concrete quality assessment model to calculate the assessment value, thus completing the quality assessment of low water-cement ratio concrete.

[0165] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0166] Furthermore, if the module / unit integrated in the electronic device 1 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0167] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor of an electronic device, the computer program can implement:

[0168] Obtain a low water-cement ratio concrete sample, and confirm a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor;

[0169] Using a pre-built desktop cutting machine to perform a cutting operation on the low water-binder ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size;

[0170] Using a drying tester and a first concrete sample to obtain the dried concrete and the dried mass, using a burning tester to test the dried concrete to obtain burning data, and using the dried mass and the burning data to calculate the strength value;

[0171] Using a permeability controller and a second concrete sample to obtain permeable concrete, using a permeability tester to test the permeable concrete, and obtaining permeability data, wherein the permeability data includes: permeable water volume, concrete volume, opening length, and opening end area, and using the permeability data to calculate a permeability value;

[0172] The ultrasonic sensor is started, wherein the ultrasonic sensor includes a transmitter and a receiver, and a preset test sound wave is emitted by the transmitter, wherein a transmission voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the transmission voltage and the receiving voltage, and a hydration value is calculated by the loss value;

[0173] The burning data, permeability data and loss values ​​are summarized to obtain a database, and a multivariate regression analysis is performed on the database using pre-built statistical software to obtain the regression analysis results. A concrete quality assessment model is constructed based on the regression analysis results, and the strength value, permeability value and hydration value are substituted into the concrete quality assessment model to calculate the assessment value, thus completing the quality assessment of low water-cement ratio concrete.

[0174] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only illustrative, and actual implementation may have other division methods.

[0175] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0176] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0177] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0178] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the system claim can also be implemented by one unit or device using software or hardware. The second and other words are used to indicate names, but not to indicate any particular order.

[0179] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A quality assessment method based on low water-cement ratio concrete, characterized in that: The method comprises: Obtain a low water-cement ratio concrete sample, and confirm a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor; Using a pre-built desktop cutting machine to perform a cutting operation on the low water-binder ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size; Using a drying tester and a first concrete sample to obtain the dried concrete and the dried mass, using a burning tester to test the dried concrete to obtain burning data, and using the dried mass and the burning data to calculate the strength value; Using a permeability controller and a second concrete sample to obtain permeable concrete, using a permeability tester to test the permeable concrete, and obtaining permeability data, wherein the permeability data includes: permeable water volume, concrete volume, opening length, and opening end area, and using the permeability data to calculate a permeability value; The ultrasonic sensor is started, wherein the ultrasonic sensor includes a transmitter and a receiver, and a preset test sound wave is emitted by the transmitter, wherein a transmission voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the transmission voltage and the receiving voltage, and a hydration value is calculated by the loss value; The burning data, permeability data and loss values ​​are summarized to obtain a database, and a multivariate regression analysis is performed on the database using pre-built statistical software to obtain the regression analysis results. A concrete quality assessment model is constructed based on the regression analysis results, and the strength value, permeability value and hydration value are substituted into the concrete quality assessment model to calculate the assessment value, thus completing the quality assessment of low water-cement ratio concrete.

2. The quality assessment method based on low water-binder ratio concrete according to claim 1, characterized in that: The step of obtaining a low water-cement ratio concrete sample and determining a sample detection environment based on the low water-cement ratio concrete sample includes: After obtaining the low water-cement ratio concrete sample, starting the conveyor belt; When the conveyor belt is successfully started, the penetration controller, drying tester, burning tester, penetration tester and ultrasonic sensor are self-tested; And when the self-test passes, the parameters of the drying tester, burning tester, penetration controller, penetration tester and ultrasonic sensor are set respectively until the parameters are set successfully, and a sample detection environment including a conveyor belt, drying tester, burning tester, penetration controller, penetration tester and ultrasonic sensor is obtained.

3. The quality assessment method based on low water-cement ratio concrete according to claim 1, characterized in that: The method uses a pre-built desktop cutting machine to perform a cutting operation on a low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, including: Identify a sample cutting environment for cutting, wherein the sample cutting environment is composed of a desktop cutting machine, a flat-mouth vise, and a workbench; After the low water-cement ratio concrete sample is fixed to the workbench by using the flat-mouth vise, a desktop cutting machine is used to perform a cutting operation on the fixed low water-cement ratio concrete sample to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein the blade in the desktop cutting machine is preset to be a diamond blade.

4. The quality assessment method based on low water-binder ratio concrete according to claim 3, characterized in that: The method of obtaining the dried concrete and the dried quality by using the drying tester and the first concrete sample, and detecting the dried concrete by using the burning tester to obtain the burning data includes: Starting a drying tester, wherein the drying tester includes a ball mill, a vacuum dryer and a first electronic balance; After the drying tester is started, the first concrete sample is crushed by a ball mill to obtain crushed concrete, the crushed concrete is dried by a vacuum dryer to obtain dried concrete, and the dried concrete is measured by a first electronic balance to obtain a drying mass; Starting a burn tester, wherein the burn tester includes a burn furnace, a second electronic balance and an X-ray diffractometer; After the burning tester is started up, the preset temperature gradient is input into the burning furnace, and the burning furnace after the temperature gradient is input is used to burn the dried concrete to obtain the burned concrete. The burned concrete is measured using a second electronic balance and an X-ray diffractometer to obtain the burning data, wherein the burning data includes the burning mass, the slag loss on burn and the cement loss on burn.

5. The quality assessment method based on low water-binder ratio concrete according to claim 4, characterized in that: The method of calculating the intensity value using the drying quality and burning data includes: The combined water content is calculated using the drying mass and ignition data. The calculation formula is as follows: Among them, W CH is the combined water content, m0 is the drying mass, m1 is the burning mass in the burning data, and m k is the slag loss on ignition in the ignition data, m s It is the cement loss on ignition in the ignition data; The strength value is calculated using the bound water content using the following formula: Among them, f c is the intensity value, T is the current thermodynamic temperature, T0 is the preset thermodynamic temperature, and γ is the preset intensity coefficient.

6. The quality assessment method based on low water-binder ratio concrete according to claim 5, characterized in that: The method of obtaining permeable concrete by using the permeability controller and the second concrete sample, and detecting the permeable concrete by using the permeability tester to obtain permeability data includes: Starting an osmotic controller, wherein the osmotic controller includes a pressure volume controller, a pressure chamber and a vacuum suction cup; After the infiltration controller is started, the second concrete sample is fixed to the pressure chamber by using a vacuum suction cup, and then the infiltration pressure is applied to the fixed second concrete sample by using a pressure volume controller to obtain infiltration concrete, wherein the infiltration concrete is composed of a concrete frame and infiltration openings; Starting a penetration tester, wherein the penetration tester includes a high-pressure water gun, an optical ruler and a water measuring device, wherein the water pressure of the high-pressure water gun is preset; After the penetration tester is started, the high-pressure water gun is used to inject water into the penetration opening of the permeable concrete until the water flow in the high-pressure water gun penetrates the penetration opening, and then the high-pressure water gun is turned off, and the amount of permeated water is obtained by using a water meter, wherein the amount of permeated water is the amount of water flowing through the permeable opening; The time of starting the high-pressure water gun is taken as the starting time, the time of water flow penetrating the penetration opening is taken as the ending time, and the penetration time is obtained using the starting time and the ending time; The optical ruler and concrete frame are used to obtain the concrete volume, opening length and opening end area, wherein the infiltration data includes: infiltration water volume, concrete volume, opening length and opening end area.

7. The quality assessment method based on low water-binder ratio concrete according to claim 6, characterized in that: The permeability value is calculated using the permeability data, and the calculation formula is: Where K(l) is the permeability value, Q is the amount of permeable water in the permeability data, l0 is the length of the opening in the permeability data, V0 is the concrete volume in the permeability data, S0 is the end area of ​​the opening in the permeability data, p is the water pressure of the high-pressure water gun, t is the permeability time, l is the distance from the starting point of the permeable opening, and the maximum value of l will not exceed l0.

8. The quality assessment method based on low water-binder ratio concrete according to claim 7, characterized in that: The method of calculating the loss value by using the transmission voltage and the reception voltage, and calculating the hydration value by using the loss value, comprises: The loss value is calculated using the transmit voltage and receive voltage. The calculation formula is as follows: Among them, u c is the loss value, U1 is the sending voltage, and U2 is the receiving voltage; The hydration value is calculated by the loss value, and the calculation formula is as follows: Among them, μ c is the hydration value, α is the preset hydration coefficient, and e represents the natural constant.

9. The quality assessment method based on low water-binder ratio concrete according to claim 8, characterized in that: The quality assessment model is as follows: <h2 style=";text-align:left;direction:ltr">A<h2 style=";text-align:left;direction:ltr"> c <h2 style=";text-align:left;direction:ltr"> =a1f<h2 style=";text-align:left;direction:ltr"> c <h2 style=";text-align:left;direction:ltr"> +a2μ<h2 style=";text-align:left;direction:ltr"> c <h2 style=";text-align:left;direction:ltr"> -a3K(l)+b Among them, A c is the evaluation value, a1, a2, a3 are all weight coefficients, and b is a constant term.

10. A quality assessment system based on low water-cement ratio concrete, characterized in that: The system comprises: A concrete sample processing module is used to obtain a low water-cement ratio concrete sample, and to confirm a sample detection environment based on the low water-cement ratio concrete sample, wherein the sample detection environment includes: a conveyor belt, a drying tester, a burning tester, a penetration controller, a penetration tester, and an ultrasonic sensor; and to perform a cutting operation on the low water-cement ratio concrete sample using a pre-built desktop cutting machine to obtain a first concrete sample, a second concrete sample, and a third concrete sample, wherein each concrete sample has the same shape and size; The strength data analysis module uses the permeability controller and the second concrete sample to obtain permeable concrete, uses the permeability tester to detect the permeable concrete, and obtains permeability data, wherein the permeability data includes: permeation water volume, concrete volume, opening length and opening end area, and uses the permeability data to calculate the permeability value; A permeability data analysis module, using a permeability controller and a second concrete sample to obtain permeable concrete, using a permeability tester to detect the permeable concrete, and obtaining permeability data, wherein the permeability data includes: permeable water volume, concrete volume, opening length and opening end area, and using the permeability data to calculate the permeability value; The hydration data analysis module starts the ultrasonic sensor, wherein the ultrasonic sensor includes a transmitter and a receiver, and uses the transmitter to transmit a preset test sound wave, wherein a transmission voltage of the test sound wave is preset, and after the test sound wave passes through the third concrete sample, a transmission sound wave is obtained, and a receiving voltage is obtained by using the receiver and the transmission sound wave, and a loss value is calculated by using the transmission voltage and the receiving voltage, and the hydration value is calculated by the loss value; The data result integration module is used to summarize the burning data, penetration data and loss values ​​to obtain a database, use pre-built statistical software to perform multivariate regression analysis on the database, obtain regression analysis results, build a concrete quality assessment model based on the regression analysis results, substitute the strength value, penetration value and hydration value into the concrete quality assessment model to calculate the assessment value, and complete the quality assessment of low water-cement ratio concrete.

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