Penetration type mortar strength detection device

Abstract

The invention relates to the technical field of mortar strength detection, in particular to a penetration type mortar strength detection device. According to the device, gravel attribute parameters corresponding to mortar to be detected are obtained through detection, the porosity of gravel is obtained through calculation based on the gravel attribute parameters, gravel liquefaction test of shear wave velocity is conducted on the gravel based on the porosity of the gravel, the liquefaction resistance strength of the gravel is obtained, and mortar preparation is conducted on the gravel meeting the mortar preparation requirement. The method comprises the following steps: detecting a mortar solidification sample based on a penetration type mortar strength detection instrument to obtain mortar strength, carrying out stability detection on the mortar solidification sample based on a transient dynamic method to obtain an integrity detection result of the mortar solidification sample, and evaluating the stability of the mortar solidification sample according to an analysis result to obtain a stability evaluation result. The quality of the mortar solidification sample is evaluated based on the mortar strength and stability evaluation result, and the accuracy and reliability of the quality detection result of the mortar solidification sample can be ensured according to the mortar attribute information.

Description

Technical Field

[0001] The invention relates to the technical field of mortar strength detection, and in particular to a penetration-type mortar strength detection device. Background Art

[0002] In construction projects, road construction, bridge construction and various civil engineering projects, mortar is a key bonding material, and its strength is directly related to the stability and durability of the engineering structure. Therefore, accurate and rapid evaluation of mortar strength is an important prerequisite for ensuring engineering quality and preventing safety accidents.

[0003] Traditional mortar strength testing methods, such as the cube compression test, are accurate, but they are cumbersome and time-consuming, and require the destruction of samples, making them unsuitable for non-destructive testing of in-service structures. Existing penetration mortar strength testing methods still face some challenges in practical applications. On the one hand, different types of mortars (such as cement mortar, gypsum mortar, etc.) may have different relationships between penetration depth and strength due to their different compositions, proportions, and curing conditions, leading to inaccurate test results.

[0004] Therefore, there is an urgent need for a penetration mortar strength detection device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a penetration mortar strength detection device to solve the technical problem that the existing penetration mortar strength detection method is inaccurate in mortar strength detection, resulting in safety risks in the acceptance of project quality.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A penetration-type mortar strength testing device, the device comprising a sand and gravel testing unit, a mortar preparation unit and a quality assessment unit;

[0008] A gravel detection unit is used to detect and obtain gravel property parameters corresponding to the mortar to be tested, calculate the porosity of the gravel based on the gravel property parameters, perform a gravel liquefaction test of the gravel using shear wave velocity based on the porosity of the gravel to obtain the anti-liquefaction strength of the gravel, and judge whether the gravel corresponding to the mortar to be tested meets the mortar preparation requirements based on the anti-liquefaction strength;

[0009] A mortar preparation unit, used for preparing mortar from gravel that meets the mortar preparation requirements;

[0010] The quality assessment unit tests the mortar solidification samples based on the penetration mortar strength test instrument to obtain the mortar strength, performs stability test on the mortar solidification samples based on the transient dynamic method to obtain the integrity test results of the mortar solidification samples, evaluates the stability of the mortar solidification samples based on the analysis results to obtain the stability evaluation results, and evaluates the quality of the mortar solidification samples based on the mortar strength and stability evaluation results.

[0011] Furthermore, the porosity of gravel is calculated based on the gravel property parameters, which specifically includes the following process:

[0012] The particle size of the gravel is obtained based on the gravel attribute parameters, and the gravel is classified based on the particle size to obtain fine gravel, medium-coarse gravel and coarse gravel:

[0013] The gravel with a particle size of 160um to 630um is defined as fine gravel, the gravel with a particle size of 631um to 1.25mm is defined as medium-coarse gravel, and the gravel with a particle size greater than 1.25mm is defined as coarse gravel;

[0014] Determine the weight coefficients k1, k2 and k3 corresponding to the fine gravel, medium-coarse gravel and coarse gravel, collect the gravel of the quantitative volume V, and determine the volume proportions V1, V2 and V3 of the fine gravel, medium-coarse gravel and coarse gravel in the quantitative volume V respectively;

[0015] The porosity KX of gravel is calculated according to the correlation formula, which is as follows:

[0016]

[0017] Among them, the value of e is 2.72, β is the mud content in the quantitative volume V, and E is the mud block content in the quantitative volume V.

[0018] Furthermore, based on the porosity of the gravel, a gravel liquefaction test of the shear wave velocity is carried out on the gravel to obtain the anti-liquefaction strength of the gravel, which specifically includes the following processes:

[0019] Calculation of shear wave velocity V using the gravel content correction in gravel liquefaction tests S :

[0020]

[0021] Among them, V Max is the upper limit shear wave velocity of the gravel liquefaction test with shear wave velocity, and its value is 157 m / s; b is the effective contact ratio of coarse and fine particles of gravel, and its value is 0.65; GC is the content of gravel to be tested in the gravel liquefaction test with shear wave velocity;

[0022] Calculate the liquefaction resistance CRR of gravel:

[0023]

[0024] Wherein, ΔV is the stress offset corrected shear wave velocity, and its value is 58 m / s.

[0025] Furthermore, judging whether the gravel corresponding to the mortar to be tested meets the mortar preparation requirements based on the anti-liquefaction strength specifically includes the following processes:

[0026] Loading the anti-liquefaction strength threshold, wherein the anti-liquefaction strength threshold is stored in the storage unit of the penetration mortar strength detection device, and its value is set by the storage unit, to determine whether the anti-liquefaction strength of the gravel exceeds the anti-liquefaction strength threshold, if so, it is determined that the gravel corresponding to the mortar to be detected meets the mortar preparation requirements, if not, it is determined that the gravel corresponding to the mortar to be detected does not meet the mortar preparation requirements.

[0027] Furthermore, preparing mortar for gravel that meets the mortar preparation requirements specifically includes the following process:

[0028] Divide the strength ranges based on the liquefaction resistance of the gravel;

[0029] If the anti-liquefaction strength of the gravel is in the first strength interval, the first strength interval is the anti-liquefaction strength is less than 0.036, determine the composition ratio of the mortar: cement accounts for 30%, water accounts for 15%, fly ash accounts for 20%, chelating agent accounts for 5%, clay accounts for 10%, fly ash accounts for 10%, diatomaceous earth accounts for 10%;

[0030] If the anti-liquefaction strength of the gravel is in the second strength interval, the second strength interval is that the anti-liquefaction strength is greater than 0.036 and less than 0.064, determine the composition ratio of the mortar: cement accounts for 20%, water accounts for 20%, fly ash accounts for 20%, chelating agent accounts for 10%, clay accounts for 10%, fly ash accounts for 10%, and diatomaceous earth accounts for 10%;

[0031] If the anti-liquefaction strength of gravel is in the third strength interval, the third strength interval is the anti-liquefaction strength greater than 0.064, and the composition ratio of mortar is determined: cement accounts for 15%, water accounts for 25%, fly ash accounts for 25%, chelating agent accounts for 5%, clay accounts for 10%, fly ash accounts for 10%, and diatomaceous earth accounts for 10%.

[0032] Furthermore, the mortar solidification sample is tested based on the penetration mortar strength testing instrument to obtain the mortar strength, which specifically includes the following processes:

[0033] Place the flat head of the penetration mortar strength tester at the middle of the mortar solidification sample and vertically stick it on the surface of the mortar joint of the mortar solidification sample to be tested;

[0034] Hold the handle of the penetration mortar strength tester, pull the trigger, and penetrate the test nail into the mortar to be tested;

[0035] After the penetration is completed, pull out the measuring nail;

[0036] Read the penetration depth value;

[0037] Arrange the penetration depth values ​​of all measuring points and calculate statistics such as the mean or median;

[0038] Find the strength curve:

[0039] According to the model and specifications of the penetration mortar strength tester used, find the corresponding strength curve and convert the strength value:

[0040] Substitute the measured penetration depth value into the strength measurement curve to calculate the compressive strength value of the mortar.

[0041] Furthermore, the stability of the mortar solidification sample is tested based on the transient dynamic method to obtain the integrity test result of the mortar solidification sample. The stability of the mortar solidification sample is evaluated based on the analysis result. The stability evaluation result specifically includes the following process:

[0042] The mortar solidification sample is hammered based on the excitation equipment, and the compression wave generated by the hammering is collected based on the pile low strain detector. The collected compression wave is processed and analyzed to obtain the analysis results:

[0043] The compression wave is processed and analyzed based on the time domain analysis method: when the incident compression wave propagates to the defect position, the wave impedance changes. The impedance of the stable mortar solidification sample is preset to be Z1, and the impedance obtained by detecting the area where the incident compression wave is reflected is Z2. Then, the stability coefficient of the mortar solidification sample is calculated based on Z1 and Z2 as Z2 / Z1, and the reflection coefficient is The transmission coefficient is If the incident pressure wave waveform changes only in position with time but not in phase, the stability coefficient of the mortar solidification sample is Z2 / Z1 is 1, and the reflection coefficient is is 0, and the transmission coefficient is If Z2 / Z1 is 1, the mortar solidification sample is a stable mortar solidification sample. If the incident pressure wave waveform changes in phase and Z2 / Z1 is greater than 1 or Z2 / Z1 is less than 1, the mortar solidification sample is an unstable mortar solidification sample.

[0044] Furthermore, the quality of the mortar solidification sample is evaluated based on the mortar strength and stability evaluation results, and specifically includes the following processes:

[0045] Determine whether the mortar strength exceeds a preset mortar strength threshold, if so, determine that the quality of the mortar solidification sample is qualified, if not, determine that the quality of the mortar solidification sample is unqualified;

[0046] If the stability assessment result is a stable mortar solidification sample, the quality of the mortar solidification sample is judged to be qualified; otherwise, the quality of the mortar solidification sample is judged to be unqualified.

[0047] Compared with the existing solutions, the present invention achieves the following beneficial effects:

[0048] The penetration-type mortar strength detection device provided by the present invention obtains gravel property parameters corresponding to the mortar to be detected through detection, calculates the porosity of the gravel based on the gravel property parameters, performs a gravel liquefaction test of the gravel using shear wave velocity based on the porosity of the gravel to obtain the anti-liquefaction strength of the gravel, and judges whether the gravel corresponding to the mortar to be detected meets the mortar preparation requirements based on the anti-liquefaction strength; performs mortar preparation on the gravel that meets the mortar preparation requirements; detects the mortar solidification sample based on the penetration-type mortar strength detection instrument to obtain the mortar strength, performs stability detection on the mortar solidification sample based on the transient dynamic method to obtain the integrity detection result of the mortar solidification sample, evaluates the stability of the mortar solidification sample based on the analysis result to obtain the stability evaluation result, and evaluates the quality of the mortar solidification sample based on the mortar strength and stability evaluation results, so as to ensure the accuracy and reliability of the quality detection result of the mortar solidification sample according to the mortar property information, and further improve the detection efficiency.

[0049] Furthermore, the shortcomings of the existing penetration mortar strength testing method in terms of accuracy and applicability are solved, providing a more efficient and reliable testing method for construction project quality monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0051] Figure 1 It is a structural block diagram of a penetration type mortar strength detection device according to an embodiment of the present invention;

[0052] Figure 2 is a detection flow chart of a first penetration type mortar strength detection device according to an embodiment of the present invention;

[0053] Figure 3 It is a detection flow chart of the second penetration mortar strength detection device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, well-known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0056] This embodiment provides a penetration type mortar strength detection device, Figure 1 is a structural block diagram of a penetration type mortar strength detection device according to an embodiment of the present invention, such as Figure 1 As shown, the device includes a grit detection unit, a mortar preparation unit and a quality assessment unit;

[0057] A gravel detection unit is used to detect and obtain gravel property parameters corresponding to the mortar to be tested, calculate the porosity of the gravel based on the gravel property parameters, perform a gravel liquefaction test of the gravel using shear wave velocity based on the porosity of the gravel to obtain the anti-liquefaction strength of the gravel, and judge whether the gravel corresponding to the mortar to be tested meets the mortar preparation requirements based on the anti-liquefaction strength;

[0058] A mortar preparation unit, used for preparing mortar from gravel that meets the mortar preparation requirements;

[0059] The quality assessment unit tests the mortar solidification samples based on the penetration mortar strength test instrument to obtain the mortar strength, performs stability test on the mortar solidification samples based on the transient dynamic method to obtain the integrity test results of the mortar solidification samples, evaluates the stability of the mortar solidification samples based on the analysis results to obtain the stability evaluation results, and evaluates the quality of the mortar solidification samples based on the mortar strength and stability evaluation results.

[0060] In summary, the penetration-type mortar strength testing device provided by the present invention obtains gravel property parameters corresponding to the mortar to be tested through detection, calculates the porosity of the gravel based on the gravel property parameters, performs a gravel liquefaction test of the gravel using shear wave velocity based on the porosity of the gravel to obtain the anti-liquefaction strength of the gravel, and judges whether the gravel corresponding to the mortar to be tested meets the mortar preparation requirements based on the anti-liquefaction strength; performs mortar preparation on the gravel that meets the mortar preparation requirements; performs detection on the mortar solidification sample based on the penetration-type mortar strength testing instrument to obtain the mortar strength, performs stability detection on the mortar solidification sample based on the transient dynamic method to obtain the integrity detection result of the mortar solidification sample, evaluates the stability of the mortar solidification sample based on the analysis result to obtain the stability evaluation result, evaluates the quality of the mortar solidification sample based on the mortar strength and stability evaluation results, and can ensure the accuracy and reliability of the quality detection result of the mortar solidification sample according to the mortar property information, thereby further improving the detection efficiency.

[0061] In some embodiments, Figure 2 is a detection flow chart of the first penetration mortar strength detection device according to an embodiment of the present invention, such as Figure 2 As shown, the porosity of gravel is calculated based on the gravel property parameters, which specifically includes the following steps:

[0062] Step S201: Obtain the particle size of the gravel based on the gravel attribute parameters, and classify the gravel based on the particle size to obtain fine gravel, medium-coarse gravel and coarse gravel:

[0063] The gravel with a particle size of 160um to 630um is defined as fine gravel, the gravel with a particle size of 631um to 1.25mm is defined as medium-coarse gravel, and the gravel with a particle size greater than 1.25mm is defined as coarse gravel;

[0064] Step S202: Determine the weight coefficients k1, k2 and k3 corresponding to the fine gravel, medium-coarse gravel and coarse gravel, collect gravel of a quantitative volume V, and determine the volume proportions V1, V2 and V3 of the fine gravel, medium-coarse gravel and coarse gravel in the quantitative volume V respectively;

[0065] Step S203: Calculate the porosity KX of the gravel according to a correlation formula, which is as follows:

[0066]

[0067] Among them, the value of e is 2.72, β is the mud content in the quantitative volume V, and E is the mud block content in the quantitative volume V.

[0068] In some embodiments, performing a gravel liquefaction test of shear wave velocity on the gravel based on the porosity of the gravel to obtain the anti-liquefaction strength of the gravel specifically includes the following process:

[0069] It is worth noting that the shear wave velocity refers to the speed at which shear waves propagate in the soil, which reflects the stiffness and damping characteristics of the soil. Under the action of an earthquake, the soil is subjected to shear force. When the shear wave velocity is low, the soil is prone to deformation and destruction, which is called liquefaction. Therefore, by measuring the shear wave velocity of the soil, its liquefaction potential can be evaluated.

[0070] Test methods

[0071] Sample preparation: Prepare gravel soil samples with different gradations and gravel contents according to the test requirements. The sample preparation should be carried out strictly in accordance with relevant specifications to ensure the representativeness and accuracy of the sample.

[0072] Install sensors: Install shear wave velocity sensors in the specimen to measure the propagation velocity of shear waves in the specimen. The installation location and quantity of sensors should be determined according to the test requirements.

[0073] Apply shear waves: Apply shear waves to the specimen through a vibration table or other equipment to simulate the shear force under earthquake. The frequency, amplitude and other parameters of the shear wave should be set according to the test requirements.

[0074] Measuring shear wave velocity: While applying shear waves, use sensors to measure the propagation velocity of shear waves in the sample. The accuracy and reliability of the data should be ensured during the measurement process.

[0075] Data analysis: Based on the measured shear wave velocity data, combined with other physical parameters of the soil (such as density, water content, etc.), the liquefaction potential of the soil is calculated using relevant theories or empirical formulas. At the same time, the anti-liquefaction measures of the soil can also be studied and discussed based on the test results.

[0076] Specifically, the gravel content corrected shear wave velocity V in the gravel liquefaction test is used to calculate the shear wave velocity. S :

[0077]

[0078] Among them, V Max is the upper limit shear wave velocity of the gravel liquefaction test with shear wave velocity, and its value is 157 m / s; b is the effective contact ratio of coarse and fine particles of gravel, and its value is 0.65; GC is the content of gravel to be tested in the gravel liquefaction test with shear wave velocity;

[0079] Calculate the liquefaction resistance CRR of gravel:

[0080]

[0081] Wherein, ΔV is the stress offset corrected shear wave velocity, and its value is 58 m / s.

[0082] Furthermore, judging whether the gravel corresponding to the mortar to be tested meets the mortar preparation requirements based on the anti-liquefaction strength specifically includes the following processes:

[0083] Loading the anti-liquefaction strength threshold, wherein the anti-liquefaction strength threshold is stored in the storage unit of the penetration mortar strength detection device, and its value is set by the storage unit, to determine whether the anti-liquefaction strength of the gravel exceeds the anti-liquefaction strength threshold, if so, it is determined that the gravel corresponding to the mortar to be detected meets the mortar preparation requirements, if not, it is determined that the gravel corresponding to the mortar to be detected does not meet the mortar preparation requirements.

[0084] The mortar preparation of gravel that meets the mortar preparation requirements specifically includes the following processes:

[0085] Divide the strength ranges based on the liquefaction resistance of the gravel;

[0086] If the anti-liquefaction strength of the gravel is in the first strength interval, the first strength interval is the anti-liquefaction strength is less than 0.036, determine the composition ratio of the mortar: cement accounts for 30%, water accounts for 15%, fly ash accounts for 20%, chelating agent accounts for 5%, clay accounts for 10%, fly ash accounts for 10%, diatomaceous earth accounts for 10%;

[0087] If the anti-liquefaction strength of the gravel is in the second strength interval, the second strength interval is that the anti-liquefaction strength is greater than 0.036 and less than 0.064, determine the composition ratio of the mortar: cement accounts for 20%, water accounts for 20%, fly ash accounts for 20%, chelating agent accounts for 10%, clay accounts for 10%, fly ash accounts for 10%, and diatomaceous earth accounts for 10%;

[0088] If the anti-liquefaction strength of gravel is in the third strength interval, the third strength interval is the anti-liquefaction strength greater than 0.064, and the composition ratio of mortar is determined: cement accounts for 15%, water accounts for 25%, fly ash accounts for 25%, chelating agent accounts for 5%, clay accounts for 10%, fly ash accounts for 10%, and diatomaceous earth accounts for 10%.

[0089] In some embodiments, Figure 3 is a detection flow chart of a second penetration type mortar strength detection device according to an embodiment of the present invention, such as Figure 3 As shown, the mortar solidification sample is tested based on the penetration mortar strength testing instrument to obtain the mortar strength, which specifically includes the following steps:

[0090] Step S301: The flat head of the penetration mortar strength testing instrument is aligned with the middle of the mortar solidification sample and vertically attached to the surface of the mortar joint of the mortar solidification sample to be tested;

[0091] Step S302: holding the handle of the penetration mortar strength testing instrument, pulling the trigger, and penetrating the measuring nail into the mortar to be tested. After the penetration is completed, the measuring nail is pulled out, and the penetration depth value is read. The penetration depth values ​​of all measuring points are sorted out, and statistical quantities such as the average value or the median are calculated;

[0092] Step S303: according to the model and specification of the penetration mortar strength tester used, find the corresponding strength test curve, substitute the measured penetration depth value into the strength test curve, and convert the compressive strength value of the mortar.

[0093] In some embodiments, the stability of the mortar solidification sample is tested based on the transient dynamic method to obtain the integrity test result of the mortar solidification sample, and the stability of the mortar solidification sample is evaluated according to the analysis result. The stability evaluation result specifically includes the following process:

[0094] The mortar solidification sample is hammered based on the excitation equipment, and the compression wave generated by the hammering is collected based on the pile low strain detector. The collected compression wave is processed and analyzed to obtain the analysis results:

[0095] The compression wave is processed and analyzed based on the time domain analysis method: when the incident compression wave propagates to the defect position, the wave impedance changes. The impedance of the stable mortar solidification sample is preset to be Z1, and the impedance obtained by detecting the area where the incident compression wave is reflected is Z2. Then, the stability coefficient of the mortar solidification sample is calculated based on Z1 and Z2 as Z2 / Z1, and the reflection coefficient is The transmission coefficient is If the incident pressure wave waveform changes only in position with time but not in phase, the stability coefficient of the mortar solidification sample is Z2 / Z1, which is 1, and the reflection coefficient is

[0096] Number is is 0, and the transmission coefficient is If Z2 / Z1 is 1, the mortar solidification sample is a stable mortar solidification sample. If the incident pressure wave waveform changes in phase and Z2 / Z1 is greater than 1 or Z2 / Z1 is less than 1, the mortar solidification sample is an unstable mortar solidification sample.

[0097] In some embodiments, evaluating the quality of the mortar solidification sample based on the mortar strength and stability evaluation results specifically includes the following process:

[0098] Determine whether the mortar strength exceeds a preset mortar strength threshold, if so, determine that the quality of the mortar solidification sample is qualified, if not, determine that the quality of the mortar solidification sample is unqualified;

[0099] If the stability assessment result is a stable mortar solidification sample, the quality of the mortar solidification sample is judged to be qualified; otherwise, the quality of the mortar solidification sample is judged to be unqualified.

[0100] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0101] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0103] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only some logical function divisions. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0104] The units described as separate components may or may not be physically separated, and the components shown as units 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 units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0105] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A penetration type mortar strength detection device, characterized in that: The device includes a grit detection unit, a mortar preparation unit and a quality assessment unit; A gravel detection unit is used to detect and obtain gravel property parameters corresponding to the mortar to be tested, calculate the porosity of the gravel based on the gravel property parameters, perform a gravel liquefaction test of the gravel using shear wave velocity based on the porosity of the gravel to obtain the anti-liquefaction strength of the gravel, and judge whether the gravel corresponding to the mortar to be tested meets the mortar preparation requirements based on the anti-liquefaction strength; A mortar preparation unit, used for preparing mortar from gravel that meets the mortar preparation requirements; The quality assessment unit tests the mortar solidification samples based on the penetration mortar strength test instrument to obtain the mortar strength, performs stability test on the mortar solidification samples based on the transient dynamic method to obtain the integrity test results of the mortar solidification samples, evaluates the stability of the mortar solidification samples based on the analysis results to obtain the stability evaluation results, and evaluates the quality of the mortar solidification samples based on the mortar strength and stability evaluation results.

2. The penetration type mortar strength detection device according to claim 1, characterized in that: The porosity of gravel is calculated based on the gravel property parameters, which specifically includes the following processes: The particle size of the gravel is obtained based on the gravel attribute parameters, and the gravel is classified based on the particle size to obtain fine gravel, medium-coarse gravel and coarse gravel: The gravel with a particle size of 160um to 630um is defined as fine gravel, the gravel with a particle size of 631um to 1.25mm is defined as medium-coarse gravel, and the gravel with a particle size greater than 1.25mm is defined as coarse gravel; Determine the weight coefficients k1, k2 and k3 corresponding to the fine gravel, medium-coarse gravel and coarse gravel, collect the gravel of the quantitative volume V, and determine the volume proportions V1, V2 and V3 of the fine gravel, medium-coarse gravel and coarse gravel in the quantitative volume V respectively; The porosity KX of the gravel is calculated according to the correlation formula, which is as follows: Among them, the value of e is 2.72, β is the mud content in the quantitative volume V, and E is the mud block content in the quantitative volume V.

3. The penetration type mortar strength detection device according to claim 2, characterized in that: Based on the porosity of gravel, the gravel liquefaction test of shear wave velocity is carried out on the gravel to obtain the anti-liquefaction strength of the gravel, which specifically includes the following processes: Calculation of shear wave velocity V using the gravel content correction in gravel liquefaction tests S : Among them, V Max is the upper limit shear wave velocity of the gravel liquefaction test with shear wave velocity, and its value is 157 m / s; b is the effective contact ratio of coarse and fine particles of gravel, and its value is 0.65; GC is the content of gravel to be tested in the gravel liquefaction test with shear wave velocity; Calculate the liquefaction resistance CRR of gravel: Wherein, ΔV is the stress offset corrected shear wave velocity, and its value is 58 m / s.

4. The penetration type mortar strength detection device according to claim 1, characterized in that: Judging whether the gravel corresponding to the mortar to be tested meets the mortar preparation requirements based on the anti-liquefaction strength specifically includes the following processes: Loading the anti-liquefaction strength threshold, wherein the anti-liquefaction strength threshold is stored in the storage unit of the penetration mortar strength detection device, and its value is set by the storage unit, to determine whether the anti-liquefaction strength of the gravel exceeds the anti-liquefaction strength threshold, if so, it is determined that the gravel corresponding to the mortar to be detected meets the mortar preparation requirements, if not, it is determined that the gravel corresponding to the mortar to be detected does not meet the mortar preparation requirements.

5. The penetration type mortar strength detection device according to claim 1, characterized in that: The mortar preparation of gravel that meets the mortar preparation requirements specifically includes the following processes: Divide the strength ranges based on the liquefaction resistance of the gravel; If the anti-liquefaction strength of the gravel is in the first strength interval, the first strength interval is the anti-liquefaction strength is less than 0.036, determine the composition ratio of the mortar: cement accounts for 30%, water accounts for 15%, fly ash accounts for 20%, chelating agent accounts for 5%, clay accounts for 10%, fly ash accounts for 10%, diatomaceous earth accounts for 10%; If the anti-liquefaction strength of the gravel is in the second strength interval, the second strength interval is that the anti-liquefaction strength is greater than 0.036 and less than 0.064, determine the composition ratio of the mortar: cement accounts for 20%, water accounts for 20%, fly ash accounts for 20%, chelating agent accounts for 10%, clay accounts for 10%, fly ash accounts for 10%, and diatomaceous earth accounts for 10%; If the anti-liquefaction strength of gravel is in the third strength interval, the third strength interval is the anti-liquefaction strength greater than 0.064, and the composition ratio of mortar is determined: cement accounts for 15%, water accounts for 25%, fly ash accounts for 25%, chelating agent accounts for 5%, clay accounts for 10%, fly ash accounts for 10%, and diatomaceous earth accounts for 10%.

6. The penetration type mortar strength detection device according to claim 1, characterized in that: The mortar solidification sample is tested based on the penetration mortar strength testing instrument to obtain the mortar strength, which specifically includes the following processes: Place the flat head of the penetration mortar strength tester at the middle of the mortar solidification sample and vertically stick it on the surface of the mortar joint of the mortar solidification sample to be tested; Hold the handle of the penetration mortar strength tester, pull the trigger, and penetrate the test nail into the mortar to be tested; After the penetration is completed, pull out the measuring nail; Read the penetration depth value; Arrange the penetration depth values ​​of all measuring points and calculate statistics such as the mean or median; Find the intensity curve: According to the model and specifications of the penetration mortar strength tester used, find the corresponding strength curve and convert the strength value: Substitute the measured penetration depth value into the strength measurement curve to calculate the compressive strength value of the mortar.

7. The penetration type mortar strength detection device according to claim 1, characterized in that: Based on the transient dynamic method, the stability of the mortar solidification sample is tested to obtain the integrity test results of the mortar solidification sample. The stability of the mortar solidification sample is evaluated based on the analysis results. The stability evaluation results specifically include the following processes: The mortar solidification sample is hammered based on the excitation equipment, and the compression wave generated by the hammering is collected based on the pile low strain detector. The collected compression wave is processed and analyzed to obtain the analysis results: The compression wave is processed and analyzed based on the time domain analysis method: when the incident compression wave propagates to the defect position, the wave impedance changes. The impedance of the stable mortar solidification sample is preset to be Z1, and the impedance obtained by detecting the area where the incident compression wave is reflected is Z2. Then, the stability coefficient of the mortar solidification sample is calculated based on Z1 and Z2 as Z2 / Z1, and the reflection coefficient is The transmission coefficient is If the incident pressure wave waveform changes only in position with time but not in phase, the stability coefficient of the mortar solidification sample is Z2 / Z1 is 1, and the reflection coefficient is is 0, and the transmission coefficient is If Z2 / Z1 is 1, the mortar solidification sample is a stable mortar solidification sample. If the incident pressure wave waveform changes in phase and Z2 / Z1 is greater than 1 or Z2 / Z1 is less than 1, the mortar solidification sample is an unstable mortar solidification sample.

8. The penetration type mortar strength detection device according to claim 1, characterized in that: The quality assessment of mortar setting samples based on the mortar strength and stability assessment results specifically includes the following processes: Determine whether the mortar strength exceeds a preset mortar strength threshold, if so, determine that the quality of the mortar solidification sample is qualified, if not, determine that the quality of the mortar solidification sample is unqualified; If the stability assessment result is a stable mortar solidification sample, the quality of the mortar solidification sample is judged to be qualified; otherwise, the quality of the mortar solidification sample is judged to be unqualified.

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