An automatic forming, curing and testing integrated device for cement mortar and its control method

Abstract

The present invention relates to the technical field of building material testing, and discloses an integrated device for automatic forming, curing and testing of cement mortar and a control method. The present invention realizes the automation of the whole process of cement mortar testing, reduces manual operation, lowers the labor intensity, and improves the testing efficiency. At the same time, the present invention combines temperature environmental factors to carry out flexural and compressive tests on cement mortar, and monitors the deformation of specimens during the whole testing process. Precise temperature control ensures the accuracy and stability of the test results, reduces errors caused by environmental factors, and avoids misjudgment of the test results of cement mortar according to the deformation of specimens during the whole testing process, eliminating the risk of potential unqualified products.

Description

Technical Field

[0001] The present invention relates to the technical field of building material testing, and particularly relates to an integrated device for automatic forming, curing and testing of cement mortar and a control method therefor. Background Art

[0002] During the production and use of cement, it is necessary to strictly test the performance of cement. Among them, the forming, curing and performance testing of cement mortar are important links. In the traditional cement mortar testing process, forming, curing and testing are carried out on different devices respectively. The operation is cumbersome and requires manual transfer of specimens multiple times. This not only consumes a large amount of manpower and time, but also easily damages the specimens during the transfer process, affecting the accuracy of the test results.

[0003] At the same time, there are many deficiencies in the existing testing methods for cement mortar specimens: on the one hand, the traditional method does not precisely control the testing environment and does not consider that the fluctuation of temperature factors will have a greater impact on the test results; on the other hand, only the load at the time of specimen failure is obtained, lacking the monitoring of the entire testing process, resulting in incomplete test results. Therefore, the present invention provides an integrated device for automatic forming, curing and testing of cement mortar and a control method therefor. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated device for automatic forming, curing and testing of cement mortar and a control method therefor to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An integrated device for automatic forming, curing and testing of cement mortar includes a raw material mixing module, a forming module, a curing module, a testing module and a control system. The raw material mixing module includes an automatic batching device that can accurately weigh raw materials according to a preset ratio and perform sufficient stirring and mixing through a stirring mechanism to ensure the uniformity of cement mortar.

[0007] The forming module is connected to the raw material mixing module and includes an automated mold opening and closing mechanism and a vibration forming device. The mixed cement mortar enters the mold in the forming module through a conveying pipeline. The mold is automatically positioned and closed under the action of the automated mold opening and closing mechanism. The vibration forming device vibrates the cement mortar in the mold according to the set frequency and time to make it fill densely and complete the specimen forming.

[0008] The curing module is connected to the forming module. The formed specimens directly enter the curing module through a conveying device. The curing module is provided with a temperature and humidity control system that can precisely control the temperature and humidity of the curing environment, simulate different curing conditions, and ensure that the specimens are cured in a standard environment.

[0009] The test module is connected to the curing module. The specimens after curing are automatically transported to the test module. The test module includes a compressive strength test device and a flexural strength test device, and records and analyzes the test data in real time and sends it to the control system;

[0010] The control system controls the entire equipment. The operator can control each module through the operation interface and analyze and evaluate the data sent by the test module automatically.

[0011] A control method for an automatic forming, curing and testing integrated equipment for cement mortar, the method comprising the following steps:

[0012] Step S1, raw material mixing: The operator inputs the mix ratio parameters of the required cement mortar on the operation interface of the control system. The automatic batching device accurately weighs the corresponding amounts of cement, sand and water from the cement storage bin, sand storage bin and water storage tank respectively according to the parameters. The weighed raw materials enter the mixing mechanism, and the mixing mechanism stirs according to the set stirring speed and time to make the cement, sand and water fully mixed evenly to form qualified cement mortar;

[0013] Step S2, forming step: The mixed cement mortar enters the mold in the forming module through the conveying pipeline. The mold is automatically positioned and closed under the action of the automated mold opening and closing mechanism. The vibration forming device starts to vibrate the mold according to the preset frequency and time to make the cement mortar fill densely in the mold and complete the forming of the specimen;

[0014] Step S3, curing step: The formed specimens directly enter the curing module through the conveying device. The temperature and humidity control system in the curing module automatically adjusts the temperature and humidity in the curing chamber according to the set curing conditions;

[0015] During the curing process, the temperature and humidity control system monitors the temperature and humidity of the curing environment in real time and makes automatic adjustments according to the monitored data to ensure that the specimens are always in a standard curing environment;

[0016] Step S4, testing step: The specimens after curing are transported to the test module by the conveying device, and are respectively subjected to compressive strength test and flexural strength test. The test module transmits the test data obtained in real time to the control system, and the control system evaluates the data.

[0017] As a further description of the solution of the present invention, the specific working process of the step S4 includes:

[0018] Step S41, take out the cement mortar specimens from the curing chamber, eliminate the unqualified specimens, and number the qualified specimens according to the pre-established numbering rules;

[0019] Step S42: Turn on the temperature control system of the test environmental chamber, conduct the flexural strength test on the qualified specimens, and transmit the data to the control system. The control system analyzes and evaluates the flexural test.

[0020] Step S43: Turn on the temperature control system of the test environmental chamber, conduct the compressive strength test on the qualified specimens, and transmit the data to the control system. The control system analyzes and evaluates the compressive test data.

[0021] As a further description of the solution of the present invention, the specific working process of the step S42 includes:

[0022] According to the temperature change, divide the flexural strength test process into n stages, slowly apply the load at a set loading rate until the specimen breaks, and automatically record the flexural failure load at the time of fracture. At the same time, use the displacement sensor to monitor the first deformation amount of the specimen in real time, and obtain the deformation curve of the first deformation amount with time under each stage;

[0023] According to the flexural failure load at the time of fracture under each stage and the deformation curve of the first deformation amount with time under each stage , analyze and evaluate the flexural test process of the specimen.

[0024] As a further description of the solution of the present invention, the specific process of analyzing and evaluating the flexural test process of the specimen includes:

[0025] Compare the flexural failure load at the time of fracture under each stage with the standard flexural failure load at the time of fracture set by the system. If the flexural failure load at the time of fracture in any stage is lower than the standard flexural failure load at the time of fracture set by the system, it means that the flexural test result of the cement mortar specimen is unqualified;

[0026] If there is no flexural failure load at the time of fracture in any stage that is lower than the standard flexural failure load at the time of fracture set by the system, further analyze the flexural test result of the cement mortar specimen.

[0027] As a further description of the solution of the present invention, the specific process of further analyzing the flexural test result of the cement mortar specimen includes:

[0028] Construct a calculation model for the potential unqualified coefficient of the flexural test result of the cement mortar specimen, and the expression is:

[0029] ;

[0030] In the formula, is the potential unqualified coefficient of the flexural test result of the cement mortar specimen, is the deformation curve of the first deformation amount with time in the i-th flexural test stage, is the standard deformation curve of the first deformation amount over time in the i-th flexural test stage, is the initial moment of the i-th flexural test stage, is the end moment of the i-th flexural test stage, is the total first deformation amount in the i-th flexural test stage, is the weight coefficient corresponding to the i-th flexural test stage, where i belongs to n;

[0031] Compare the potential unqualified coefficient of the flexural test result of the cement mortar specimen with the set interval of the potential unqualified coefficient of the flexural test result of the cement mortar specimen. If the potential unqualified coefficient of the flexural test result of the cement mortar specimen does not meet the set interval of the potential unqualified coefficient of the flexural test result of the cement mortar specimen, it indicates that the flexural test result of the cement mortar specimen is potentially unqualified.

[0032] As a further description of the solution of the present invention, the specific working process of the step S43 includes:

[0033] According to the temperature change, divide the compressive strength test process into m stages, slowly apply the load at a set loading rate until the specimen fails, and automatically record the compressive failure load. At the same time, use a displacement sensor to monitor the first deformation amount of the specimen in real time, and obtain the deformation curve of the second deformation amount over time in each stage;

[0034] According to the compressive failure load at failure in each stage and the deformation curve of the second deformation amount over time in each stage , analyze and evaluate the compressive test process of the specimen.

[0035] As a further description of the solution of the present invention, the specific process of analyzing and evaluating the compressive test process of the specimen includes:

[0036] Compare the compressive failure load at failure in each stage with the standard compressive failure load at failure set by the system. If the compressive failure load at failure in any stage is lower than the standard compressive failure load at failure set by the system, it indicates that the compressive test result of the cement mortar specimen is unqualified;

[0037] If the compressive failure load at failure in any stage is not lower than the standard compressive failure load at failure set by the system, further analyze the compressive test result of the cement mortar specimen.

[0038] As a further description of the solution of the present invention, the specific process of further analyzing the compressive test result of the cement mortar specimen includes:

[0039] Construct a calculation model for the potential unqualified coefficient of the compressive test result of the cement mortar specimen, and the expression is:

[0040] ;

[0041] Wherein, is the potential unqualified coefficient of the compressive test result of the cement mortar specimen, is the deformation curve of the second deformation quantity with time at the j-th compressive test stage, is the standard deformation curve of the second deformation quantity with time at the j-th compressive test stage, is the initial moment of the j-th compressive test stage, is the end moment of the j-th compressive test stage, is the total second deformation quantity at the j-th compressive test stage, is the weight coefficient corresponding to the j-th compressive test stage, j belongs to m;

[0042] Compare the potential unqualified coefficient of the compressive test result of the cement mortar specimen with the set interval of the potential unqualified coefficient of the compressive test result of the cement mortar specimen. If the potential unqualified coefficient of the compressive test result of the cement mortar specimen does not meet the set interval of the potential unqualified coefficient of the compressive test result of the cement mortar specimen, it indicates that the potential unqualified of the compressive test result of the cement mortar specimen.

[0043] As a further description of the solution of the present invention, the specific working process of the step S4 further includes:

[0044] Step S44: Analyze the overall test result of the cement mortar specimen;

[0045] Construct a calculation model for the overall state coefficient of the cement mortar specimen, and the expression is:

[0046] = + ;

[0047] Wherein, is the overall state coefficient of the cement mortar specimen, is the flexural failure load at fracture in the i-th flexural test stage, is the standard flexural failure load at fracture set by the system in the i-th flexural test stage, is the compressive failure load at fracture in the j-th compressive test stage, is the standard compressive failure load at fracture set by the system in the j-th compressive test stage, is the set interval of the potential unqualified coefficient of the flexural test result of the cement mortar specimen, is the set interval of the potential unqualified coefficient of the compressive test result of the cement mortar specimen, and are weight coefficients respectively;

[0048] Compare the overall state coefficient of the cement mortar specimen with the table range of the overall state coefficient of the cement mortar specimen set by the system. According to the overall state coefficient of the cement mortar specimen, evaluate the overall test results of the cement mortar specimen for the corresponding interval it belongs to.

[0049] Advantages of the present invention:

[0050] 1. The present invention realizes the automation of the whole process of cement mortar detection, reduces manual operation, lowers labor intensity and improves detection efficiency;

[0051] 2. The present invention combines temperature environment factors to conduct flexural and compressive tests on cement mortar, and monitors the deformation of specimens during the whole test process. Precise temperature control ensures the accuracy and stability of test results, reduces errors caused by environmental factors, and avoids misjudgment of test results based on the deformation of specimens during the whole test process, eliminating the risk of potential non-conformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The present invention will be further described below with reference to the accompanying drawings.

[0053] Figure 1 is a partial flow schematic diagram of the control method of the automatic forming, curing and testing integrated equipment for cement mortar provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] Please refer to Figure 1 As shown, an automatic forming, curing and testing integrated equipment for cement mortar includes a raw material mixing module, a forming module, a curing module, a testing module and a control system. The raw material mixing module includes an automatic batching device, which can accurately weigh raw materials according to a preset ratio and fully stir and mix them through a stirring mechanism to ensure the uniformity of the cement mortar;

[0056] The forming module, which is connected to the raw material mixing module, includes an automated mold opening and closing mechanism and a vibration forming device. The well-mixed cement mortar enters the mold of the forming module through a conveying pipeline. The mold is automatically positioned and closed under the action of the automated mold opening and closing mechanism. The vibration forming device vibrates the cement mortar in the mold according to the set frequency and time to make it fill densely, completing the forming of the specimen.

[0057] The curing module, which is connected to the forming module, directly transports the formed specimen into the curing module through a conveying device. There is a temperature and humidity control system in the curing module, which can accurately control the temperature and humidity of the curing environment, simulate different curing conditions, and ensure that the specimen is cured in a standard environment.

[0058] The testing module, which is connected to the curing module, automatically transports the cured specimen to the testing module. The testing module includes a compressive strength testing device and a flexural strength testing device, and records and analyzes the test data in real time and sends it to the control system.

[0059] The control system, the entire equipment is uniformly controlled by the control system. The operator can control each module through the operation interface and automatically analyze and evaluate the data sent by the testing module.

[0060] A control method for an automatic forming, curing and testing integrated equipment for cement mortar, the method includes the following steps:

[0061] Step S1, raw material mixing: The operator inputs the mix ratio parameters of the required cement mortar on the operation interface of the control system. The automatic batching device accurately weighs the corresponding amounts of cement, sand and water from the cement storage bin, sand storage bin and water storage tank respectively according to the parameters. The weighed raw materials enter the mixing mechanism, and the mixing mechanism mixes according to the set mixing speed and time to make the cement, sand and water fully mixed evenly to form qualified cement mortar.

[0062] Step S2, forming step: The well-mixed cement mortar enters the mold of the forming module through a conveying pipeline. The mold is automatically positioned and closed under the action of the automated mold opening and closing mechanism. The vibration forming device starts to vibrate the mold according to the preset frequency and time to make the cement mortar fill densely in the mold, completing the forming of the specimen.

[0063] Step S3, curing step: The formed specimen directly enters the curing module through the conveying device. The temperature and humidity control system in the curing module automatically adjusts the temperature and humidity in the curing room according to the set curing conditions.

[0064] During the curing process, the temperature and humidity control system monitors the temperature and humidity of the curing environment in real time and makes automatic adjustments according to the monitored data to ensure that the specimen is always in a standard curing environment.

[0065] Step S4, testing step: The specimens after curing are conveyed by the conveying device to the testing module, and are respectively subjected to compressive strength testing and flexural strength testing. The testing module transmits the data obtained from the testing to the control system in real time, and the control system evaluates the data.

[0066] Through the above technical solution, in the present invention, the operator inputs the mix ratio parameters of the required cement mortar on the operation interface of the control system. The automatic batching device accurately weighs the corresponding amounts of cement, sand and water from the cement storage bin, sand storage bin and water storage tank respectively according to the parameters, and then the weighed raw materials enter the mixing mechanism. The mixing mechanism mixes them at the set mixing speed and time to make the cement, sand and water fully and evenly mixed to form qualified cement mortar. Then, the mixed cement mortar enters the mold in the forming module through the conveying pipeline. The mold is automatically positioned and closed under the action of the automated mold opening and closing mechanism. Then, the vibration forming device is started to vibrate the mold at the preset frequency and time to make the cement mortar fill densely in the mold to complete the forming of the specimen. The formed specimen directly enters the curing module through the conveying device. The temperature and humidity control system in the curing module automatically adjusts the temperature and humidity in the curing chamber according to the set curing conditions, such as a temperature of 20±2°C and a humidity of more than 95%. During the curing process, the temperature and humidity control system monitors the temperature and humidity of the curing environment in real time and automatically adjusts according to the monitored data to ensure that the specimen is always in a standard curing environment. The specimens after curing are conveyed by the conveying device to the testing module. First, they enter the flexural strength testing device. The testing device conducts flexural tests on the specimens at different temperatures, records the relevant data and analyzes the test results according to the data. Subsequently, they enter the compressive strength testing device. The testing device conducts compressive tests on the specimens at different temperatures, records the relevant data and analyzes the test results according to the data.

[0067] As a further description of the solution of the present invention, the specific working process of the step S4 includes:

[0068] Step S41, take out the cement mortar specimens from the curing chamber, eliminate the unqualified specimens, and number the qualified specimens according to the pre-established numbering rules;

[0069] Step S42, turn on the temperature control system of the test environment chamber, conduct flexural strength tests on the qualified specimens, and transmit the data to the control system. The control system analyzes and evaluates the flexural tests;

[0070] Step S43, turn on the temperature control system of the test environment chamber, conduct compressive strength tests on the qualified specimens, and transmit the data to the control system. The control system analyzes and evaluates the compressive test data.

[0071] As a further description of the solution of the present invention, the specific working process of the step S42 includes:

[0072] According to the temperature change, the flexural strength test process is divided into n stages. The load is slowly applied at a set loading rate until the specimen breaks, and the flexural failure load at break is automatically recorded. At the same time, a displacement sensor is used to monitor the first deformation amount of the specimen in real time, and the deformation curve of the first deformation amount over time at each stage is obtained.

[0073] Based on the flexural failure load at break at each stage and the deformation curve of the first deformation amount over time at each stage , the flexural test process of the specimen is analyzed and evaluated.

[0074] As a further description of the solution of the present invention, the specific process of analyzing and evaluating the flexural test process of the specimen includes:

[0075] The flexural failure load at break at each stage is compared with the standard flexural failure load at break set by the system. If the flexural failure load at break in any stage is lower than the standard flexural failure load at break set by the system, it indicates that the flexural test result of the cement mortar specimen is unqualified;

[0076] If the flexural failure load at break in any stage is not lower than the standard flexural failure load at break set by the system, the flexural test result of the cement mortar specimen is further analyzed.

[0077] As a further description of the solution of the present invention, the specific process of further analyzing the flexural test result of the cement mortar specimen includes:

[0078] Construct a calculation model for the potential unqualified coefficient of the flexural test result of the cement mortar specimen, and the expression is:

[0079] ;

[0080] In the formula, is the potential unqualified coefficient of the flexural test result of the cement mortar specimen, is the deformation curve of the first deformation amount over time in the i-th flexural test stage, is the standard deformation curve of the first deformation amount over time in the i-th flexural test stage, is the initial moment of the i-th flexural test stage, is the end moment of the i-th flexural test stage, is the total first deformation amount in the i-th flexural test stage, is the weight coefficient corresponding to the i-th flexural test stage, and i belongs to n;

[0081] The potential unqualified coefficient of the flexural test result of the cement mortar specimen Compared with the preset potential unqualified coefficient range of the flexural test result of the cement mortar specimen, if the potential unqualified coefficient of the flexural test result of the cement mortar specimen does not meet the preset potential unqualified coefficient range of the flexural test result of the cement mortar specimen, it indicates that the flexural test result of the cement mortar specimen is potentially unqualified.

[0082] Through the above technical solution, this embodiment provides a method for testing the flexural strength of a cement mortar specimen. First, the testing process is divided into n stages according to the temperature change. Then, the flexural failure load at the time of specimen fracture in each stage is obtained. If the flexural failure load at the time of fracture in any stage is lower than the standard flexural failure load at the time of fracture set by the system, it indicates that the flexural test result of the cement mortar specimen is unqualified. If the flexural failure load at the time of fracture in any stage is not lower than the standard flexural failure load at the time of fracture set by the system, the deformation curve of the first deformation amount of the specimen with time in each stage is obtained. Then, through the formula the potential unqualified coefficient of the flexural test result of the cement mortar specimen is obtained, and the potential unqualified coefficient of the flexural test result of the cement mortar specimen is compared with the preset potential unqualified coefficient range of the flexural test result of the cement mortar specimen. If the potential unqualified coefficient of the flexural test result of the cement mortar specimen does not meet the preset potential unqualified coefficient range of the flexural test result of the cement mortar specimen, it indicates that the flexural test result of the cement mortar specimen is potentially unqualified.

[0083] As a further description of the solution of the present invention, the specific working process of step S43 includes:

[0084] According to the temperature change, the compressive strength test process is divided into m stages, and the load is slowly applied until the specimen fails at the set loading rate, and the compressive failure load is automatically recorded. At the same time, the first deformation amount of the specimen is monitored in real time by a displacement sensor, and the deformation curve of the second deformation amount with time in each stage is obtained;

[0085] According to the compressive failure load at the time of failure in each stage and the deformation curve of the second deformation amount with time in each stage , the compressive test process of the specimen is analyzed and evaluated.

[0086] As a further description of the solution of the present invention, the specific process of analyzing and evaluating the compressive test process of the specimen includes:

[0087] Compare the compressive failure load at the time of failure in each stage with the standard compressive failure load at the time of failure set by the system. If the compressive failure load at the time of failure in any stage is lower than the standard compressive failure load at the time of failure set by the system, it indicates that the compressive test result of the cement mortar specimen is unqualified;

[0088] If the compressive failure load when no failure occurs in any stage is lower than the standard compressive failure load set by the system when failure occurs, then the compressive test results of the cement mortar specimens are further analyzed.

[0089] As a further description of the solution of the present invention, the specific process of further analyzing the compressive test results of the cement mortar specimens includes:

[0090] Construct a calculation model for the potential non - compliance coefficient of the compressive test results of the cement mortar specimens, and the expression is:

[0091] ;

[0092] In the formula, is the potential non - compliance coefficient of the compressive test results of the cement mortar specimens, is the deformation curve of the second deformation quantity with time in the j - th compressive test stage, is the standard deformation curve of the second deformation quantity with time in the j - th compressive test stage, is the initial moment of the j - th compressive test stage, is the end moment of the j - th compressive test stage, is the total second deformation quantity in the j - th compressive test stage, is the weight coefficient corresponding to the j - th compressive test stage, and j belongs to m;

[0093] Compare the potential non - compliance coefficient of the compressive test results of the cement mortar specimens with the set interval of the potential non - compliance coefficient of the compressive test results of the cement mortar specimens. If the potential non - compliance coefficient of the compressive test results of the cement mortar specimens does not meet the set interval of the potential non - compliance coefficient of the compressive test results of the cement mortar specimens, it indicates that the potential of the compressive test results of the cement mortar specimens is non - compliant.

[0094] Through the above technical solution, this embodiment provides a method for testing the compressive strength of cement mortar specimens. First, according to the temperature change, the test process is divided into m stages. Then, the compressive failure load when the specimen fails in each stage is obtained. If the compressive failure load when failure occurs in any stage is lower than the standard compressive failure load set by the system when failure occurs, it indicates that the compressive test results of the cement mortar specimens are unqualified. If the compressive failure load when no failure occurs in any stage is lower than the standard compressive failure load set by the system when failure occurs, then the deformation curve of the second deformation quantity of the specimen with time in each stage is obtained. Then, through the formula the potential non - compliance coefficient of the compressive test results of the cement mortar specimens is obtained, and the potential non - compliance coefficient Compared with the preset potential unqualified coefficient range of the compressive test results of cement mortar specimens, if the potential unqualified coefficient of the compressive test results of cement mortar specimens does not meet the preset potential unqualified coefficient range of the compressive test results of cement mortar specimens, it indicates that the potential unqualified of the compressive test results of cement mortar specimens.

[0095] The weight coefficient corresponding to the i-th flexural test stage is related to the corresponding temperature stage and the flexural failure load of each stage. The temperature corresponding to each stage is obtained respectively and the failure load corresponding to each stage ;

[0096] The weight coefficient corresponding to each flexural test stage is calculated by the following formula:

[0097] ;

[0098] The weight coefficient corresponding to the j-th compressive test stage is related to the corresponding temperature stage and the compressive failure load of each stage. The temperature corresponding to each stage is obtained respectively and the compressive failure load corresponding to each stage ;

[0099] The weight coefficient corresponding to each compressive test stage is calculated by the following formula:

[0100] ;

[0101] In the formula, is the flexural failure load at fracture in the i-th flexural test stage, is the compressive failure load at failure in the j-th compressive test stage, is the temperature corresponding to the i-th flexural test stage, is the temperature corresponding to the j-th compressive test stage.

[0102] As a further description of the solution of the present invention, the specific working process of step S4 further includes:

[0103] Step S44: Analyze the overall test results of cement mortar specimens;

[0104] Construct a calculation model for the overall state coefficient of cement mortar specimens, and the expression is:

[0105] = + ;

[0106] In the formula, is the overall state coefficient of the cement mortar specimen, is the flexural failure load at fracture in the i-th flexural test stage, is the standard flexural failure load set by the system at fracture in the i-th flexural test stage, is the compressive failure load at failure in the j-th compressive test stage, is the standard compressive failure load set by the system at failure in the j-th compressive test stage, is the potential unqualified coefficient interval of the flexural test result of the cement mortar specimen set by the system, is the potential unqualified coefficient interval of the compressive test result of the cement mortar specimen set by the system, and are the weight coefficients respectively;

[0107] It should be noted that the weight coefficient belongs to , and the weight coefficient belongs to , , which are empirical values and are determined according to the degree of dependence on the failure load and deformation amount during the overall test result analysis. When completely dependent on the failure load =1, and when completely dependent on the deformation amount =1.

[0108] Compare the overall state coefficient of the cement mortar specimen with the table interval of the overall state coefficient of the cement mortar specimen set by the system. Evaluate the overall test result of the cement mortar specimen according to the corresponding interval to which the overall state coefficient of the cement mortar specimen belongs.

[0109] Through the above technical solution, this embodiment provides a method for analyzing the overall test result of a cement mortar specimen. According to the failure loads and potential unqualified coefficients at each stage during the flexural and compressive tests, calculate the overall state coefficient of the cement mortar specimen through the formula , and then compare the overall state coefficient of the cement mortar specimen with the table interval of the overall state coefficient of the cement mortar specimen set by the system. Evaluate the overall test result of the cement mortar specimen according to the corresponding interval to which the overall state coefficient of the cement mortar specimen belongs.

[0110] It should be noted that the table interval of the overall state coefficient of the cement mortar specimen is an empirical value. According to experience, the overall test result is evaluated into four levels: excellent, good, medium, and poor. A value interval is set for the overall state coefficient of the cement mortar specimen at each level.

[0111] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as defining the scope of implementation of the present invention. All equivalent changes and improvements made in accordance with the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. An integrated device for automatic forming, curing and testing of cement mortar, comprising a raw material mixing module, a forming module, a curing module, a testing module and a control system, characterized in that the raw material mixing module includes an automatic batching device, which can accurately weigh raw materials according to a preset ratio and fully stir and mix them through a stirring mechanism to ensure the uniformity of the cement mortar; the forming module is connected to the raw material mixing module and includes an automated mold opening and closing mechanism and a vibration forming device. The mixed cement mortar enters the mold in the forming module through a conveying pipeline. The mold is automatically positioned and closed under the action of the automated mold opening and closing mechanism. The vibration forming device vibrates the cement mortar in the mold according to the set frequency and time to make it fill densely and complete the forming of the specimen; the curing module is connected to the forming module. The formed specimen directly enters the curing module through a conveying device. The curing module is provided with a temperature and humidity control system, which can accurately control the temperature and humidity of the curing environment, simulate different curing conditions, and ensure that the specimen is cured in a standard environment; the testing module is connected to the curing module. The cured specimen is automatically transported to the testing module. The testing module includes a compressive strength testing device and a flexural strength testing device, and can record and analyze the test data in real time and send it to the control system; the control system uniformly controls the entire device. The operator can control each module through the operation interface and automatically analyze and evaluate the data sent by the testing module; The working process of the control system includes: According to the temperature change, the flexural strength test process is divided into n stages. The load is slowly applied at a set loading rate until the specimen breaks, and the flexural failure load at the break is automatically recorded. At the same time, a displacement sensor is used to monitor the first deformation amount of the specimen in real time, and the deformation curve of the first deformation amount with time under each stage is obtained; According to the flexural failure load at fracture in each stage and the deformation curve of the first deformation quantity over time in each stage , analyze and evaluate the flexural test process of the specimen; The specific process of analyzing and evaluating the flexural test process of the specimen includes: Compare the flexural failure load at the break in each stage with the standard flexural failure load at the break set by the system. If the flexural failure load at the break in any stage is lower than the standard flexural failure load at the break set by the system, it means that the flexural test result of the cement mortar specimen is unqualified; If the flexural failure load at the break in any stage is not lower than the standard flexural failure load at the break set by the system, the flexural test result of the cement mortar specimen is further analyzed; The specific process of further analyzing the flexural test result of the cement mortar specimen includes: Construct a calculation model for the potential unqualified coefficient of the flexural test result of the cement mortar specimen, and the expression is: ； Wherein, is the potential unqualified coefficient of the flexural test result of the cement mortar specimen, is the first deformation curve of the first deformation amount with time in the i th flexural test stage, is the standard curve of the first deformation amount with time in the i th flexural test stage, is the initial moment of the i th flexural test stage, is the end moment of the i th flexural test stage, is the total first deformation amount in the i th flexural test stage, is the weight coefficient corresponding to the i th flexural test stage, i belongs to n ; The potential unqualified coefficient of the flexural test results of cement mortar specimens is compared with the set interval of the potential unqualified coefficient of the flexural test results of cement mortar specimens. If the potential unqualified coefficient of the flexural test results of cement mortar specimens does not meet the set interval of the potential unqualified coefficient of the flexural test results of cement mortar specimens, it indicates that the flexural test results of cement mortar specimens are potentially unqualified; According to the temperature change, the compressive strength test process is divided into stages. The load is slowly applied until the specimen fails at a set loading rate, and the compressive failure load is automatically recorded. At the same time, the displacement sensor is used to monitor the second deformation of the specimen in real time, and the deformation curve of the second deformation with time under each stage is obtained; According to the compressive failure load at failure in each stage and the deformation curve of the second deformation quantity with time in each stage , analyze and evaluate the compressive test process of the specimen; The specific process of analyzing and evaluating the compressive test process of the specimen includes: Compare the compressive failure load at the break in each stage with the standard compressive failure load at the break set by the system. If the compressive failure load at the break in any stage is lower than the standard compressive failure load at the break set by the system, it means that the compressive test result of the cement mortar specimen is unqualified; If the compressive failure load when no failure occurs in any stage is lower than the standard compressive failure load set by the system when failure occurs, the compressive test results of the cement mortar specimens are further analyzed; The specific process of further analyzing the compressive test results of the cement mortar specimens includes: Construct a calculation model for the potential unqualified coefficient of the compressive test results of the cement mortar specimens, and the expression is: ； In the formula, is the potential unqualified coefficient of the compressive test result of the cement mortar specimen, is the deformation curve of the second deformation variable with time at the th compressive test stage, is the standard deformation curve of the second deformation variable with time at the th compressive test stage, is the initial moment of the th compressive test stage, is the end moment of the th compressive test stage, is the total second deformation variable at the th compressive test stage, is the weight coefficient corresponding to the jth compressive test stage, belongs to ; The potential unqualified coefficient of the compressive strength test results of cement mortar specimens is compared with the set interval of the potential unqualified coefficient of the compressive strength test results of cement mortar specimens. If the potential unqualified coefficient of the compressive strength test results of cement mortar specimens does not meet the set interval of the potential unqualified coefficient of the compressive strength test results of cement mortar specimens, it indicates that the potential unqualified of the compressive strength test results of cement mortar specimens.

2. A control method for an integrated device for automatic forming, curing and testing of cement mortar, the method being based on the integrated device for automatic forming, curing and testing of cement mortar according to claim 1, characterized in that, The method includes the following steps: Step S1, raw material mixing: The operator inputs the mix ratio parameters of the required cement mortar on the operation interface of the control system. The automatic batching device accurately weighs the corresponding amounts of cement, sand, and water from the cement storage bin, sand storage bin, and water storage tank respectively according to the parameters. The weighed raw materials enter the mixing mechanism, and the mixing mechanism stirs according to the set stirring speed and time to fully mix the cement, sand, and water evenly to form qualified cement mortar; Step S2, molding step: The mixed cement mortar enters the mold of the molding module through the conveying pipeline. The mold is automatically positioned and closed under the action of the automated mold opening and closing mechanism. The vibration molding device starts to vibrate the mold according to the preset frequency and time to make the cement mortar fill densely in the mold and complete the molding of the specimen; Step S3, curing step: The molded specimens directly enter the curing module through the conveying device. The temperature and humidity control system in the curing module automatically adjusts the temperature and humidity in the curing room according to the set curing conditions; During the curing process, the temperature and humidity control system monitors the temperature and humidity of the curing environment in real time and makes automatic adjustments according to the monitoring data to ensure that the specimens are always in the standard curing environment; Step S4, testing step: The cured specimens are conveyed to the testing module by the conveying device for compressive strength testing and flexural strength testing respectively. The testing module transmits the test data obtained in real time to the control system, and the control system evaluates the data.

3. The control method of an integrated device for automatic forming, curing and testing of cement mortar according to claim 2, characterized in that, The specific working process of step S4 includes: Step S41, take out the cement mortar specimens from the curing room, eliminate the unqualified specimens, and number the qualified specimens according to the pre-established numbering rules; Step S42, turn on the temperature control system of the test environment chamber, conduct flexural strength testing on the qualified specimens, and transmit the data to the control system. The control system analyzes and evaluates the flexural test; Step S43, turn on the temperature control system of the test environment chamber, conduct compressive strength testing on the qualified specimens, and transmit the data to the control system. The control system analyzes and evaluates the compressive test data; If it is within the unqualified coefficient range, it indicates that the compressive test results of the cement mortar specimens are potentially unqualified.

4. The control method of an integrated device for automatic forming, curing and testing of cement mortar according to any one of claims 2-3, characterized in that, The specific working process of step S4 also includes: Step S44, analyze the overall test results of the cement mortar specimens; Construct a calculation model for the overall state coefficient of the cement mortar specimens, and the expression is: = + ； In the formula, is the overall state coefficient of the cement mortar specimen, is the flexural failure load at fracture in the th flexural test stage, is the standard flexural failure load set by the system at fracture in the th flexural test stage, is the compressive failure load at failure in the th compressive test stage, is the standard compressive failure load set by the system at failure in the th compressive test stage, is the potential unqualified coefficient range of the flexural test result of the cement mortar specimen set by the system, is the potential unqualified coefficient range of the compressive test result of the cement mortar specimen set by the system, and are the weight coefficients respectively; Compare the overall state coefficient of the cement mortar specimen with the table range of the overall state coefficient of the cement mortar specimen set in the system. Evaluate the overall test results of the cement mortar specimen according to the corresponding range to which the overall state coefficient of the cement mortar specimen belongs.

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