Comprehensive measuring device and method for deformation, humidity field and water loss of cement-based materials

Abstract

The present invention provides a comprehensive measurement device and method for deformation, humidity field, and water loss of cement-based materials, which are used to measure deformation, humidity field, water loss rate, ambient temperature and humidity, and wind speed of cement-based materials. The measuring device includes a displacement measurement system, a humidity measurement system, an environmental monitoring system, a quality measurement system, a control and analysis system, and a test box. The displacement measurement system, humidity measurement system, environmental monitoring system, quality monitoring system, and control and analysis system are all integrated in the test box, and the test box has shock absorption and leveling functions. The measuring device provided by the present invention has a simple measurement method, clear principles, accurate data, is easy to carry, and can be used for multiple purposes. It can measure three test pieces at the same time and is a comprehensive test platform for studying the moisture deformation performance of cement-based materials. It can be used for scientific research experiments in laboratories, and can also be used for comparative studies of the same conditions in engineering sites and engineering structures.

Description

Technical Field

[0001] The present invention relates to the field of civil engineering materials, in particular to a device and method for comprehensively measuring deformation, humidity field and water loss of cement-based materials. Background Art

[0002] Shrinkage cracking in cementitious materials is closely related to deformation, changes in humidity, and water loss to the environment. For example, at early ages, cementitious materials continuously lose water from their surfaces, creating a humidity gradient within the material, causing drying shrinkage. Excessive shrinkage can lead to cracks, significantly reducing the material's durability and safety. Therefore, measuring deformation, humidity, and water loss in cementitious materials is crucial for studying their crack resistance.

[0003] Currently, there are many methods for measuring deformation of cement-based materials, but relatively few methods for measuring humidity field and water loss. However, there is no device or method that can measure deformation, humidity field and water loss simultaneously. When deformation, humidity field and water loss are measured separately, the test workload is large, the equipment is complex and difficult to transport, and the test plan is single. More importantly, the shortcomings are: (1) There is an inherent correlation between deformation, humidity field and water loss. Since cement-based materials are non-uniform materials, there are many factors that affect deformation, humidity field and water loss (such as environmental conditions, raw material changes, etc.). The performance of materials with the same ratio but mixed and molded in different batches will have certain differences. If deformation, humidity field and water loss cannot be measured simultaneously, the accuracy of the test results will be greatly affected; (2) It is difficult to observe and analyze deformation, humidity field and water loss data in real time; (3) Due to the limited construction site conditions, it is difficult to conduct comparative measurements under the same conditions on the construction site by measuring separately. Since the measurement of deformation, humidity field and water loss has strict requirements on accuracy, the main difficulties in synchronously measuring deformation, humidity field and water loss are: avoiding mutual influence between measurement systems to reduce measurement accuracy, and avoiding measuring equipment that is too complicated and causes inconvenience in operation.

[0004] In summary, due to the shortcomings and deficiencies of existing measurement devices, how to synchronously measure deformation, humidity field and water loss, deeply study the relationship between deformation, humidity field and water loss, realize the same conditions test on the engineering site, and improve the durability of cement-based materials are difficult problems that need to be solved in this field. Summary of the Invention

[0005] In view of this, the present invention addresses the current status and problems of measuring deformation, humidity field, and water loss of cement-based materials, and proposes a novel device for measuring deformation, humidity field, and water loss of cement-based materials, comprising:

[0006] The test box includes: a box body, a box cover, a specimen slot, a specimen mold, a displacement sensor data interface, an environmental monitoring system data interface, a bolt hole, a moving wheel, a pull rod, a handle, a display, a controller, and a level bubble, which are used to cast specimens and integrate a displacement measurement system, a humidity measurement system, an environmental monitoring system, a quality measurement system, and a control and analysis system; there are three specimen slots in total, and the three specimen slots are of the same size and are arranged in parallel on the left side of the top surface of the box body; the displacement sensor data interface and bolt holes are arranged on the edge of the top surface of the box body between the specimen slots and on the upper side; there are 22 bolt holes in total, which are used to fix the displacement sensor bracket, the target bracket, and the environmental monitoring sensor respectively; the display is installed on the right side of the top surface of the box body, and is used to display and operate the measurement data of the displacement measurement system, the humidity measurement system, the environmental monitoring system, and the quality measurement system; the controller is installed at the bottom of the display, and is used to Used to control and analyze displacement measurement systems, humidity measurement systems, environmental monitoring systems and quality measurement systems; the level bubble is installed in the middle position of the lower side of the top surface of the box body, and is used to adjust the box body to make it horizontal; the box cover is connected to the box body by a detachable hinge at the back of the box body, and is connected to the box body by a lock at the front of the box body; a groove is provided on the inner side of the box cover, and the groove is lined with sponge and elastic elastic bands for placing and fixing various sensors and test tools during transportation; the box cover can be separated from the box body and can be used as a temporary tool box; the pull rod is installed in the center position of the length direction of the bottom surface of the test box and can be pulled out from the right side of the test box; there are 2 handles, which are installed in the front and right center positions of the test box respectively; there are 4 moving wheels, which are symmetrically installed on the left side of the test box; there are 3 specimen molds, and the 3 specimen molds are of the same size, which are used to hold freshly mixed cement-based materials and are placed in the specimen slot after vibration;

[0007] A displacement measurement system includes a displacement sensor, a displacement sensor target, a displacement sensor bracket, a target bracket, and a displacement data cable system for measuring deformation of cement-based materials. Six displacement sensor brackets are fixed to the box via bolt holes during use, with two displacement sensor brackets installed on the same side of each specimen slot along its length. The displacement data cable system includes data cables between the displacement sensor and the displacement sensor data interface, and between the displacement sensor data interface and a controller. The displacement sensor is a non-contact displacement sensor and is installed on the displacement sensor bracket during use and connected to the displacement sensor data interface on the test box via a data cable. Six target brackets are fixed to the box via bolt holes, with two target brackets installed on the same side of each specimen slot along its length. The target brackets correspond to the displacement sensor brackets and are used to secure the displacement sensor targets before the cement-based material solidifies and hardens. The displacement sensor targets are pre-embedded in the cement-based material during casting, and are secured with the target brackets after the specimen mold is placed in the specimen slot. The target brackets are removed after the cement-based material solidifies.

[0008] The temperature and humidity measurement system includes: a temperature and humidity sensor, a pre-buried pipe, and a pre-buried pipe fixing bracket, which is used to measure the relative humidity inside the cement-based material; there are a total of 9 pre-buried pipe fixing brackets, which are fixed to the box body through bolt holes when in use, and 3 pre-buried pipe fixing brackets are installed on the same side of each test slot along the length direction; the pre-buried pipe is pre-buried in the cement-based material when the cement-based material is poured, and is pre-buried at different depths according to test requirements. After the test piece mold is placed in the test piece slot, it is first fixed with the pre-buried pipe fixing bracket. After the cement-based material solidifies, the pre-buried pipe fixing bracket is removed; a pre-cut is provided at the bottom of the pre-buried pipe to ensure that the ambient temperature and humidity inside the pipe are the same as the cement-based material at the bottom of the pipe; the temperature and humidity sensor is a wireless sensor, and after the test piece mold is placed in the test piece slot, the temperature and humidity sensor is inserted into the pre-buried pipe to start measurement;

[0009] The quality measurement system includes: a weighing pan and a quality data line system for measuring the quality of cement-based materials; there are three weighing pans installed at the bottom of the specimen tank to monitor the quality changes of the cement-based materials in the specimen mold; the quality data line system is used to transmit the data collected by the weighing pan to the control system.

[0010] The environmental monitoring system includes: an environmental temperature and humidity sensor, an anemometer, a light meter, and an environmental monitoring data cable system for monitoring environmental temperature, humidity, light intensity, and wind speed; the environmental monitoring system integrates the environmental temperature and humidity sensor, anemometer, and light meter into a sensor, which is fixed to the box through bolt holes when in use; the environmental monitoring data cable system is used to transmit data collected by the environmental monitoring system to the controller;

[0011] The control and analysis system is used to collect data from various measurement systems, set system parameters, analyze data and output data; the control and analysis system is integrated into the controller.

[0012] Preferably, the specimen slot has a length of 500-600 mm, a width of 110-120 mm, and a depth of 110 mm;

[0013] Preferably, the inner depth of the specimen mold is 100 mm, the inner width is 100 mm, and the length is smaller than the specimen groove. Two handles are installed on the top surface of each specimen mold in the width direction.

[0014] Preferably, the accuracy of the mass measurement system is greater than 1 g, and the capacity of each weighing pan is greater than 20 kg.

[0015] Preferably, the controller, the displacement data line system, the quality data line system, and the environment monitoring data line system are all installed inside the box.

[0016] The present invention also provides a comprehensive measurement method for deformation, humidity field, and water loss of cement-based materials, which is characterized by comprising the following steps:

[0017] S1. Place the box, level it with a spirit level, and install the environmental monitoring system.

[0018] S2. Lay a layer of polytetrafluoroethylene sheet on the bottom of the specimen mold, place a thin plate on each side of the specimen mold, and then line the specimen mold with a layer of plastic film. Pour fresh cement-based material into the plastic film.

[0019] S3. Determine whether to pre-embed displacement sensor targets and pre-embedded pipes according to test requirements, determine the positions of pre-embedded displacement sensor targets, determine the number, position, and depth of pre-embedded pipes, and then pre-embed them;

[0020] S4. Place the vibrated specimen mold in the specimen tank, install the displacement sensor bracket, target bracket, and embedded pipe fixing bracket, and fix the displacement sensor, displacement sensor target, and embedded pipe; after installing the embedded pipe, insert the temperature and humidity sensor into the embedded pipe;

[0021] S5. According to the test requirements, set the parameters of the displacement measurement system, humidity measurement system, environmental monitoring system and mass measurement system, and start collecting data;

[0022] S6. When slowly pulling out the thin plates around the specimen mold, if the cement-based material collapses, stop pulling out the thin plates; if the cement-based material does not collapse, pull out all the thin plates in the specimen mold;

[0023] S7. Remove all target brackets and embedded pipe fixing brackets;

[0024] S8. After data collection reaches the designed test age, stop all measurement systems, export the test data, place all sensors, brackets, and data cables in the corresponding grooves of the box cover, and secure them with elastic bands. Cover the box with the cover and lock it. The test is now complete.

[0025] Preferably, in step S2, after pouring the cement-based material, if a plastic film is laid on the surface of the cement-based material, the data measured are under sealed conditions; if no plastic film is laid, the data measured are under dry conditions. Plastic film can be selectively laid on the three specimens as needed, or all three specimens can be covered with plastic film first and then removed at different ages.

[0026] Compared with existing measuring devices and methods, the present invention has the following beneficial effects:

[0027] 1. The present invention realizes the simultaneous measurement of deformation, humidity field and water loss of cement-based materials on the same specimen, avoiding inaccurate test results caused by measuring deformation, humidity field and water loss separately on different specimens due to differences in the specimens;

[0028] 2. The present invention adopts non-contact displacement sensors and wireless temperature and humidity sensors, which solves the problem of mutual influence between measurement systems, greatly simplifies the measurement equipment, and avoids the entanglement of too many data cables when multiple systems are integrated for measurement;

[0029] 3. The measuring device provided by the present invention is easy to carry and can measure the deformation, humidity field and water loss of cement-based materials under the same conditions at the construction site;

[0030] 4. The measurement method provided by the present invention is simple and can realize a variety of measurement schemes, such as: (1) by controlling the time of uncovering the film sealing of the surface and side of the specimen, studying the influence of the sealing time and the number of drying surfaces on the material deformation, humidity field, and water loss; (2) comparing the deformation, humidity field, and water loss measurement data of cement-based materials with different strength grades under the same conditions;

[0031] 5. The present invention can also selectively measure one or two of the parameters according to test requirements, greatly reducing the test workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a top view of the box

[0033] Figure 2 This is the front view of the test chamber

[0034] Figure 3 It is an integrated sensor for environmental monitoring

[0035] Figure 4 This is the front view of the test piece mold

[0036] Figure 5 Schematic diagram of buried pipe

[0037] In the figure: 1. Box body; 2. Box cover; 3. Specimen slot; 4. Displacement sensor data interface; 5. Environmental monitoring system data interface; 6. Bolt hole; 7. Moving wheel; 8. Pull rod; 9. Handle; 10. Display; 11. Measurement data output interface; 12. Power switch; 13. Level bubble; 14. Specimen mold; 15. Displacement sensor; 16. Displacement sensor target; 17. Displacement sensor bracket; 18. Displacement data line; 19. Temperature and humidity sensor; 20. Weighing pan; 21. Ambient temperature and humidity sensor; 22. Light meter; 23. Anemometer; 24. Lock DETAILED DESCRIPTION

[0038] The following describes embodiments of the device and method for comprehensively measuring deformation, moisture field, and water loss of cement-based materials according to the present invention with reference to the accompanying drawings. Those skilled in the art will recognize that the described embodiments may be modified in various ways or combinations thereof without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of the claims. Furthermore, throughout this specification, the drawings are not drawn to scale, and like reference numerals represent like parts.

[0039] See also Figure 1-5 As shown, the cement-based material deformation, humidity field, and water loss comprehensive measurement device includes: a test chamber ( Figure 2 ), displacement measurement system, humidity measurement system, environmental monitoring system ( Figure 3 ) and quality measurement systems;

[0040] The test box includes: a box body 1, a box cover 2, a specimen slot 2, a specimen mold 14, a displacement sensor data interface 4, an environmental monitoring system data interface 5, a bolt hole 6, a moving wheel 7, a pull rod 8, a handle 9, a display 10, and a level bubble 13; there are 3 specimen slots 2, and the 3 specimen slots have the same size, with a slot length of 500-600 mm, a width of 110-120 mm, and a depth of 110 mm, and are arranged in parallel on the left side of the top surface of the box; the displacement sensor data interface 4 and the bolt hole 6 are arranged on the top surface of the box between the specimen slots and on the upper edge; there are 25 bolt holes 6, which are used to fix the displacement sensor bracket 17, the target bracket 25 and the environmental monitoring sensor ( Figure 3 ); a display 10 is mounted on the right side of the top surface of the box body, and is used to display and operate the measurement data of the displacement measurement system, humidity measurement system, environmental monitoring system and quality measurement system; a controller is mounted at the bottom of the display body, and is used to control and analyze the displacement measurement system, humidity measurement system, environmental monitoring system and quality measurement system; a level bubble 13 is mounted in the middle position of the lower side of the top surface of the box body, and is used to adjust the box body to make it horizontal; the box cover 2 is connected to the box body by a detachable hinge at the back of the box body, and is connected to the box body 1 by a lock 24 at the front of the box body; a groove is provided on the inner side of the box cover 2, and the groove is lined with sponge and elastic elastic band for placing and fixing various sensors and test tools during transportation. The box cover 2 can be separated from the box body 1 and can be used as a temporary tool box; a pull rod 8 is mounted on the center position of the length direction of the bottom surface of the test box and can be pulled out from the right side of the test box; there are two handles 9, which are respectively mounted on the test box ( Figure 2 ) front and right center; there are 4 moving wheels 7, which are symmetrically installed in the test box ( Figure 2) left; there are 3 specimen molds 14, 3 specimen molds of the same size, an internal depth of 100mm, an internal width of 100mm, and a length smaller than the specimen slot. Each specimen mold 14 is provided with two handles on the top surface in the width direction for holding freshly mixed cement-based materials, which are placed in the specimen slot after vibrating;

[0041] The displacement measurement system includes: a displacement sensor 15, a displacement sensor target 16, a displacement sensor bracket 17, a target bracket 25, and a displacement data line system, which is used to measure the deformation of cement-based materials; there are 6 displacement sensor 17 brackets, which are fixed to the box through bolt holes 6 when in use, and two displacement sensor 17 brackets are installed on the same side of each specimen slot 3 along the length direction; the displacement data line system includes a data line 18 between the displacement sensor and the displacement sensor data interface, and a data line between the displacement sensor data interface and the controller; the displacement sensor 15 is a non-contact displacement sensor and is installed on the displacement sensor when in use. The displacement sensor bracket 17 is connected to the displacement sensor data interface on the test box via a data cable; there are six target brackets 25, which are fixed to the box body 1 through bolt holes 6. Two target brackets 25 are installed on the same side of each specimen slot 3 along the length direction. The target brackets 25 correspond to the displacement sensor brackets 17 and are used to fix the displacement sensor target 16 before the cement-based material solidifies and hardens. The displacement sensor target 16 is pre-embedded in the cement-based material during casting. After the specimen mold 14 is placed in the specimen slot 3, it is first fixed with the target bracket 25. After the cement-based material solidifies, the target bracket 25 is removed;

[0042] Temperature and humidity measurement system, including: temperature and humidity sensor 19, embedded pipe ( Figure 5 ), embedded pipe fixing bracket, used to measure the relative humidity inside the cement-based material; there are 9 embedded pipe fixing brackets in total, which are fixed to the box through the bolt holes 6 when in use, and 3 embedded pipe fixing brackets are installed on the same side of each test piece slot 3 along the length direction; embedded pipe ( Figure 5 ) is embedded in the cement-based material when the cement-based material is poured. According to the test requirements, different depths are embedded. After the specimen mold 14 is placed in the specimen groove 3, it is first fixed with a pre-embedded pipe fixing bracket. After the cement-based material solidifies, the pre-embedded pipe fixing bracket is removed; the pre-embedded pipe ( Figure 5 ) There is a pre-cut at the bottom of the pipe to make the temperature and humidity of the environment inside the pipe the same as the cement-based material at the bottom of the pipe; the temperature and humidity sensor 19 is a wireless sensor. After the specimen mold 14 is placed in the specimen slot 3, the temperature and humidity sensor is inserted into the pre-buried pipe ( Figure 5 ) to start measuring;

[0043] The mass measurement system includes: a weighing pan 20 and a mass data line system for measuring the mass of the cement-based material; there are three weighing pans 20 installed at the bottom of the specimen tank 3, with an accuracy greater than 1g and a range greater than 20kg for each weighing pan, and is used to monitor the mass changes of the cement-based material in the specimen mold 14; the mass data line system is used to transmit the data collected by the weighing pans to the control system.

[0044] The environmental monitoring system includes: an environmental temperature and humidity sensor 21, an anemometer 23, a light meter 22, and an environmental monitoring data line system for monitoring environmental temperature, humidity, light intensity and wind speed; the environmental monitoring system integrates the environmental temperature and humidity sensor 21, anemometer 23, and light meter 22 into one sensor ( Figure 3 ), when in use, it is fixed to the box body 1 through the bolt hole 6; the environmental monitoring data line system is used to transmit the data collected by the environmental monitoring system to the controller;

[0045] The control and analysis system is used to collect data from each measurement system, set system parameters, analyze data, and output data. The control and analysis system is integrated into the controller, and the measurement data is output through output interface 11. The controller, displacement data line system, quality data line system, and environmental monitoring data line system are all installed inside the box.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A comprehensive measuring device for deformation, humidity field and water loss of cement-based materials, characterized in that: The device can measure the deformation, humidity field and water loss of cement-based materials either synchronously or separately. The device includes: A test box, comprising: a box body, a box cover, a specimen slot, a specimen mold, a displacement sensor data interface, an environmental monitoring system data interface, bolt holes, moving wheels, a pull rod, a handle, a display, a controller, and a level bubble, for casting specimens and integrating a displacement measurement system, a humidity measurement system, an environmental monitoring system, a quality measurement system, and a control and analysis system; there are three specimen slots in total, which are of the same size and are arranged in parallel on the left side of the top surface of the box body; the displacement sensor data interface and bolt holes are arranged on the edge of the top surface of the box body between the specimen slots and on the upper side; there are 25 bolt holes in total, which are used to fix the displacement sensor bracket, the target bracket, and the environmental monitoring sensor respectively; the display is installed on the right side of the top surface of the box body, for displaying and operating the measurement data of the displacement measurement system, the humidity measurement system, the environmental monitoring system, and the quality measurement system; the controller is installed at the bottom of the display The part is used to control and analyze the displacement measurement system, humidity measurement system, environmental monitoring system and quality measurement system; the level bubble is installed in the middle position of the lower side of the top surface of the box body, and is used to adjust the box body to make it horizontal; the box cover is connected to the box body by a detachable hinge at the back of the box body, and is connected to the box body by a lock at the front of the box body. A groove is provided on the inside of the box cover, and the groove is lined with sponge and elastic elastic band for placing and fixing various sensors and test tools during transportation. The box cover can be separated from the box body and can be used as a temporary tool box; the pull rod is installed at the center position of the length direction of the bottom surface of the test box and can be pulled out from the right side of the test box; there are 2 handles, which are installed at the front and right center positions of the test box respectively; there are 4 moving wheels, which are symmetrically installed on the left side of the test box; there are 3 specimen molds, and the 3 specimen molds are of the same size, used to hold freshly mixed cement-based materials, and placed in the specimen slot after vibration; A displacement measurement system is provided, comprising: a displacement sensor, a displacement sensor target, a displacement sensor bracket, a target bracket, and a displacement data cable system for measuring deformation of cement-based materials. The displacement sensor brackets comprise six in total, which are fixed to the housing via bolt holes during use, with two displacement sensor brackets mounted on the same side of each specimen slot along its length. The displacement data cable system comprises data cables between the displacement sensor and the displacement sensor data interface, and data cables between the displacement sensor data interface and a controller. The displacement sensor is a non-contact displacement sensor, which is mounted on the displacement sensor bracket during use and connected to the displacement sensor data interface on the test chamber via the data cable. The target brackets comprise six in total, which are fixed to the housing via bolt holes, with two target brackets mounted on the same side of each specimen slot along its length. The target brackets correspond to the displacement sensor brackets and are used to secure the displacement sensor targets before the cement-based material solidifies and hardens. The displacement sensor targets are embedded in the cement-based material during casting, and are secured with the target brackets after the specimen mold is placed in the specimen slot. The target brackets are removed after the cement-based material solidifies. A temperature and humidity measurement system includes: a temperature and humidity sensor, a pre-buried pipe, and a pre-buried pipe fixing bracket, which is used to measure the relative humidity inside the cement-based material; there are a total of 9 pre-buried pipe fixing brackets, which are fixed to the box body through bolt holes when in use, and 3 pre-buried pipe fixing brackets are installed on the same side of each test slot along the length direction; the pre-buried pipe is pre-buried in the cement-based material when the cement-based material is poured, and is pre-buried to different depths according to test requirements. After the test piece mold is placed in the test piece slot, it is first fixed with the pre-buried pipe fixing bracket. After the cement-based material solidifies, the pre-buried pipe fixing bracket is removed; a pre-cut is provided at the bottom of the pre-buried pipe to ensure that the ambient temperature and humidity inside the pipe are the same as those of the cement-based material at the bottom of the pipe; the temperature and humidity sensor is a wireless sensor, and after the test piece mold is placed in the test piece slot, the temperature and humidity sensor is inserted into the pre-buried pipe to start measurement; A quality measurement system, including a weighing pan and a quality data line system, is used to measure the quality of cement-based materials. The weighing pans are installed at the bottom of the specimen tank to monitor the quality changes of the cement-based materials in the specimen mold. The quality data line system is used to transmit the data collected by the weighing pans to the control system. An environmental monitoring system includes: an environmental temperature and humidity sensor, an anemometer, a light meter, and an environmental monitoring data cable system for monitoring environmental temperature, humidity, light intensity, and wind speed; the environmental monitoring system integrates the environmental temperature and humidity sensor, anemometer, and light meter into a sensor, which is fixed to the box through bolt holes when in use; the environmental monitoring data cable system is used to transmit data collected by the environmental monitoring system to a controller; A control and analysis system is used to collect data from various measurement systems, set system parameters, analyze data and output data; the control and analysis system is integrated into the controller.

2. The device for comprehensive measurement of deformation, humidity field, and water loss of cement-based materials according to claim 1, characterized in that: The test piece slot has a length of 500-600 mm, a width of 110-120 mm, and a depth of 110 mm; The interior of the test piece mold is 100 mm deep and 100 mm wide, and its length is smaller than the test piece slot. Two handles are installed on the top surface of each test piece mold in the width direction.

3. The device for comprehensive measurement of deformation, humidity field, and water loss of cement-based materials according to claim 1, characterized in that: The mass measurement system has an accuracy greater than 1g, and the capacity of each weighing pan is greater than 20kg.

4. The device for comprehensive measurement of deformation, humidity field, and water loss of cement-based materials according to claim 1, characterized in that: The controller, displacement data line system, quality data line system, and environment monitoring data line system are all installed inside the box.

5. A measurement method based on the integrated measurement device according to claim 1, characterized in that: The following steps are involved: S1. Place the box, level it with a spirit level, and install the environmental monitoring system. S2. Lay a layer of polytetrafluoroethylene sheet on the bottom of the specimen mold, place a thin plate on each side of the specimen mold, and then line the specimen mold with a layer of plastic film. Pour fresh cement-based material into the plastic film. S3. Determine whether to pre-embed displacement sensor targets and pre-embedded pipes according to test requirements, determine the positions of pre-embedded displacement sensor targets, determine the number, position, and depth of pre-embedded pipes, and then pre-embed them; S4. Place the vibrated specimen mold in the specimen tank, install the displacement sensor bracket, target bracket, and embedded pipe fixing bracket, and fix the displacement sensor, displacement sensor target, and embedded pipe; after installing the embedded pipe, insert the temperature and humidity sensor into the embedded pipe; S5. According to the test requirements, set the parameters of the displacement measurement system, humidity measurement system, environmental monitoring system and mass measurement system, and start collecting data; S6. When slowly pulling out the thin plates around the specimen mold, if the cement-based material collapses, stop pulling out the thin plates; if the cement-based material does not collapse, pull out all the thin plates in the specimen mold; S7. Remove all target brackets and embedded pipe fixing brackets; S8. After data collection reaches the designed test age, stop all measurement systems, export the test data, place all sensors, brackets, and data cables in the corresponding grooves of the box cover, and secure them with elastic bands. Cover the box with the cover and lock it. The test is now complete.

6. The measuring method according to claim 5, characterized in that In step S2, after pouring the cement-based material, if a layer of plastic film is laid on the upper surface of the cement-based material, the data measured is under sealed conditions; if no plastic film is laid, the data measured is under dry conditions; as needed, the three specimens can be selectively covered with plastic film, or the three specimens can be covered with plastic film first, and then the plastic film is removed at different ages.

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