Device and method for testing mechanical strength of multi-size filling body and monitoring hydration parameters in real time

Abstract

The invention discloses a multi-size filling body mechanical strength testing and hydration parameter real-time monitoring device and method, and relates to the field of mine filling body testing devices. When the device is used for preparing the filling body, the device comprises a side baffle and a permeable bottom plate which can be assembled and disassembled; the side baffles are formed by connecting a plurality of side plates through bolts; a plurality of side plate fixing grooves are formed in the permeable bottom plate, and the side baffles can be embedded into the side plate fixing grooves to form a filling space for preparing a filling body; when the device is used for parameter monitoring in the hydration heat release process, the device further comprises a multifunctional top plate and a segmentation screen, the multifunctional top plate covers the filling space, and the filling space is divided into a pouring inlet and a plurality of parameter monitoring sensor arrangement areas; the pouring inlet is provided with a segmentation screen used for preparing filling test blocks. Mould of various test blocks with different sizes are manufactured through one set of equipment, and the pre-cutting function of the test blocks and the real-time monitoring function of matrix suction, water content, electric conductivity and temperature and humidity are considered at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine filling body testing devices, in particular to a multi-size filling body mechanical strength testing and hydration parameter real-time monitoring device and method. BACKGROUND

[0002] The filling mining method not only can adapt to the mining demand of mine extending to deep part, effectively cope with complex working conditions such as high stress, high temperature and high water pressure, relieve ground stress concentration through the active supporting action of filling body, and ensure the safety of deep mining; at the same time, it can also realize the resource utilization of mine tailings, waste rock and other solid wastes, and reduce the land occupation caused by stacking. As the core of filling mining technology, the performance of cemented filling body is directly related to the stability and safety of the stope.

[0003] Under the environment of deep mining, the performance of cemented filling body directly affects the safety and stability of the stope. Due to the size effect, the strength of filling body tested in the laboratory cannot fully represent the actual filling strength of the underground stope. Comparative study found that the actual filling strength in the field is often higher than the laboratory test results, but the specific difference ratio still needs further study.

[0004] Cemented filling body is composed of inert solid waste, cementing material, water and activator, and its strength depends on the mechanical properties of the consolidation body formed by the hydration products of cementing material. However, the high temperature and high pressure environment of deep mining significantly affects its mechanical properties and hydration consolidation. Although 76% of the newly built metal mines in China use filling method, they still face the problems of strength attenuation and volume shrinkage under deep environment, which seriously affect the stability of the stope. Therefore, clarifying the force-thermal properties of cemented filling body under deep environment and its influence on the stability of the stope is the key to ensuring the safety and efficiency of deep mining.

[0005] At present, although there are achievements in the regulation and control of hydration and consolidation behavior of cemented filling body under deep complex environment, the systematic and scientific theoretical guidance is not perfect. Existing researches are mostly focused on material ratio optimization and single factor analysis in the laboratory, which cannot fully consider the influence of deep multi-physical field coupling, and cannot effectively solve the problems of internal temperature difference, uneven strength distribution and crack propagation of large-size filling body. At the same time, the mechanism of hydration heat release in deep environment and its influence on the long-term performance of consolidation body are not well studied, and there is a lack of targeted regulation strategy. Therefore, clarifying the evolution law of hydration process and establishing a scientific regulation method are the current key directions.

[0006] To investigate the mechanical properties and hydration heat release process of filling materials of different sizes, it is usually necessary to prepare experimental specimens of different specifications and install and deploy sensors. Currently, preparing experimental specimens of different sizes requires the use of multiple different molds, making the process cumbersome and complex. Furthermore, existing methods generally lack real-time monitoring of the thermodynamic characteristics during hydration, and cannot directly extract standard specimens for mechanical testing comparison after the hydration consolidation monitoring data has been statistically analyzed. Therefore, to investigate the thermodynamic characteristics (such as matrix suction, water content, conductivity, and temperature and humidity) of filling materials of various sizes during their hydration consolidation process, and to achieve correlation analysis between monitoring and mechanical properties, it is urgently necessary to invent a device that can both prepare experimental specimens of different sizes and study the correlation characteristics between the mechanical strength of filling materials and hydration parameters. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a device and method for testing the mechanical strength of multi-size backfill bodies and for real-time monitoring of hydration parameters. It belongs to the category of a mold-making device and method for preparing backfill test blocks of different sizes for mine tailings, as well as an integrated device for pre-treatment of experimental test blocks for mechanical testing and real-time monitoring of hydration parameters, including matrix suction, moisture content, conductivity, and temperature and humidity. This invention uses a single set of equipment to create molds for test blocks of various sizes, simultaneously addressing the pre-cutting of experimental test blocks and the real-time monitoring of matrix suction, moisture content, conductivity, and temperature and humidity.

[0008] According to a first aspect of the present invention, a device for testing the mechanical strength of multi-size filling materials and for real-time monitoring of hydration parameters is provided, for preparing filling materials, and for preparing filling test blocks and monitoring parameters during the hydration exothermic process; wherein, When used to prepare filling bodies, the device includes: combinable and detachable side panels and a permeable bottom plate; The side panel is composed of multiple side panels that are interlocked with each other. The permeable bottom plate is provided with a plurality of side plate fixing grooves arranged perpendicularly to each other. The side baffles can be embedded in the side plate fixing grooves, thereby forming an adjustable filling space for preparing the filling body. When used for monitoring parameters of the hydration heat release process, the device further includes: a multi-functional top plate and a dividing screen. The multifunctional top plate covers the filling space and divides the filling space into multiple functional areas, including: a pouring inlet and a multiple parameter monitoring sensor arrangement area; the pouring inlet is equipped with a dividing screen to form multiple cubic grid filling spaces for preparing filling test blocks.

[0009] Furthermore, each side plate has a first groove and a first protrusion at its top and bottom, respectively, and both the first groove and the first protrusion have through threaded holes, which correspond to each other; each side plate surface has multiple second grooves perpendicularly, and one side of the side plate has a second protrusion. The first protruding part of the side plate is connected to the first groove by bolts, and the first protruding part of the side plate is engaged with the first groove and the side plate fixing groove provided on the permeable bottom plate; the second protruding part of the side plate can be engaged with the second groove.

[0010] Furthermore, the multiple second grooves vertically provided on the side plate surface and the multiple side plate fixing grooves provided on the permeable bottom plate are all equidistantly arranged, and the spacing between them is the same.

[0011] Furthermore, the device can produce four standard specimens, including but not limited to 100mm*100mm*100mm cubes, 200mm*200mm*200mm cubes, 300mm*300mm*300mm cubes, and 400mm*400mm*400mm cubes.

[0012] Furthermore, the distances between the through threaded holes provided on the first protrusion and the first groove and the two farthest ends of the side plate are 330mm and 130mm, respectively, and the hole diameter is 3mm.

[0013] Furthermore, excluding the first protrusion and the first groove, the side plate has a length of 460mm, a width of 100mm, and a thickness of 10mm.

[0014] Furthermore, the second groove is 10mm wide, 5mm deep, and 100mm long.

[0015] Furthermore, the permeable bottom plate is a cuboid of 460mm*460mm*250mm, and the side plate fixing groove has a length of 460mm, a depth of 5mm, and a width of 10mm.

[0016] Furthermore, the permeable bottom plate is also provided with a permeable grid, and the permeable bottom plate is provided with threaded holes corresponding to the first functional area of ​​the multifunctional top plate. The hole diameter is 8mm and the depth is 10mm. Multiple threaded holes are arranged at 50mm intervals, and the number is 25.

[0017] Furthermore, the device includes 16 side plates.

[0018] Furthermore, on the side plate, the second groove portion at the farthest end of the second protrusion relative to the side edge is at a certain distance from the edge. Preferably, the distance between the second groove portion at the farthest end of the second protrusion relative to the side edge and the edge is 20mm.

[0019] Furthermore, on the permeable bottom plate, the side plate fixing groove is at a certain distance from the edge. Preferably, the distance between the side plate fixing groove and the edge is 5mm.

[0020] Furthermore, the plurality of functional areas include: The first functional area includes multiple penetrations, with a heat-conducting metal tube inserted into each penetration, and a sensor installed in the heat-conducting metal tube. The second and third functional areas have sensor fixing devices arranged at the center, so that the sensors are located in the second and third functional areas; The fourth functional area serves as the pouring inlet, where multiple filling test blocks are prepared using the segmented screen for mechanical testing pretreatment.

[0021] Furthermore, in the first functional area, multiple penetrations are arranged at equal intervals.

[0022] Furthermore, in the first functional area, multiple penetration holes are arranged at 50mm intervals, with a hole diameter of 10mm, and a total of 25 holes.

[0023] Furthermore, the heat-conducting metal tube has a diameter of 8mm and a length of 420mm, and the bottom of the metal tube is provided with a 10mm thread.

[0024] Furthermore, in the first functional area, the heat-conducting metal tube is inserted into the corresponding threaded hole on the base plate for fixation.

[0025] The second functional area is equipped with a matrix suction sensor; The third functional area is equipped with an integrated moisture content and conductivity sensor.

[0026] Preferably, the matrix suction sensor is a MeterTeros21 sensor; Preferably, the integrated moisture content and conductivity sensor is a 5TE type sensor.

[0027] Furthermore, in the fourth functional area, the size of the cubic mesh filling space is 50mm*50mm*50mm.

[0028] Furthermore, the first functional area is equipped with an RC-4H type temperature and humidity recorder and an HFP01 type heat flow sensor; Furthermore, the side panels and multifunctional top panels are made of polymer plastic materials or non-metallic materials.

[0029] Furthermore, the device also includes a sealing strip for sealing the groove and the threaded hole in the base plate.

[0030] According to a second aspect of the present invention, a method for testing the mechanical strength of multi-size filling materials and real-time monitoring hydration parameters is provided. This method, operated by a device for testing the mechanical strength of multi-size filling materials and real-time monitoring hydration parameters according to any of the above aspects, includes: preparing a filling material, preparing a filling test block, and monitoring parameters during the hydration heat release process; wherein... When preparing the filling material, the method includes: According to the required size, multiple side plates are selected and connected to each other with bolts through threaded holes to form a side baffle. The side baffle is then embedded in the side plate fixing groove provided on the permeable bottom plate to form a filling space of the specified size. Casting is used to prepare the filling material; When preparing the filling test block and monitoring parameters during the hydration exothermic process, the method includes: Multiple side plates are selected and connected to each other with bolts through threaded holes to form a side baffle. The side baffle is then embedded in the side plate fixing groove provided on the permeable bottom plate to form a filling space. The multifunctional top plate is covered over the filling space, and the filling space is divided into multiple functional areas, including: a pouring inlet and an area for arranging multiple parameter monitoring sensors; Sensors are arranged in the area where multiple parameter monitoring sensors are deployed; A segmented screen is inserted into the pouring inlet to form multiple cubic grid filling spaces; The filling test blocks were prepared by casting, and the parameters and data were monitored and recorded during the hydration heat release process.

[0031] The beneficial effects of this invention are: This device not only creates molds for specimens of various sizes but also provides real-time monitoring of multiple parameters, including matrix suction, moisture content, conductivity, temperature, and humidity. It integrates mold making with multi-dimensional monitoring, eliminating the need for additional equipment and improving experimental efficiency. Through the free combination of side plates, it can create specimens of various standard sizes, including 100mm*100mm*100mm, 200mm*200mm*200mm, 300mm*300mm*300mm, and 400mm*400mm*400mm cubes, meeting the diverse experimental requirements for specimen size and demonstrating strong applicability.

[0032] The four side walls and permeable bottom plate of the box frame are all removable. When made of polymer plastic or non-metallic materials, the side plate assembly can be directly removed after curing to take out the specimen. The operation is simple and can reduce damage to the specimen.

[0033] The multifunctional top plate is divided into four zones, each equipped with different types of sensors. The sensors are strategically positioned to collect parameters specific to each zone, providing comprehensive and accurate data for analyzing the physical properties and hydration process of the filling material. A stainless steel mesh is installed at the D-gap of the multifunctional top plate to form a standard cubic grid. After curing, the mesh can be removed to directly obtain standard test blocks for mechanical experiments, eliminating the need for post-curing segmentation of the filling binder and saving time and labor costs.

[0034] The device is tightly connected and fixed via grooves, and equipped with rubber sealing strips of different lengths to seal the grooves, forming a regularly shaped filling and curing body, reducing experimental errors and ensuring the reliability of experimental results. It can simultaneously acquire hydration parameters and mechanical property data of the filling body, facilitating comparative analysis and further exploring the correlation between the mechanical strength of the filling body and hydration parameters, providing more in-depth evidence for related research. Attached Figure Description

[0035] Figure 1 The diagram shown is a schematic diagram of a multi-size filling material mechanical strength testing and hydration parameter real-time monitoring device according to an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of a cubic structure with dimensions of 100mm*100mm*100mm, used only for fabricating filling body test blocks according to the present invention.

[0037] Figure 3 This is a schematic diagram of a cubic structure with dimensions of 200mm*200mm*200mm, used only for fabricating filling body test blocks according to the present invention.

[0038] Figure 4 This is a schematic diagram of a cubic structure with dimensions of 300mm*300mm*300mm, used only for fabricating filling body test blocks according to the present invention.

[0039] Figure 5 This is a schematic diagram of a cubic structure with dimensions of 400mm*400mm*400mm, used only for fabricating filling body test blocks according to the present invention.

[0040] Figure 6 This is a schematic diagram of the arrangement of the heat-conducting copper pipe and stainless steel isolation mesh according to an embodiment of the present invention.

[0041] Among them, 1-side plate made of polymer plastic or non-metallic material, 2-upper connecting groove, 3-bolt hole of upper connecting groove, 4-lower connecting groove, 5-bolt hole of lower connecting groove, 6-side plate fixing groove, 7-3mm bolt, 8-permeable bottom plate made of polymer plastic or non-metallic material, 9-bottom plate fixing groove, 10-permeable mesh, 11-threaded hole of bottom plate, 12-rubber sealing strip, 13-threaded heat-conducting copper pipe, 14-stainless steel screen, 15-multifunctional top plate made of polymer plastic or non-metallic material, 16-top plate penetration hole, 17-matrix suction sensor fixing device, 18-MeterTeros21 sensor, 19-moisture content and conductivity sensor fixing device, 20-5TE type sensor. Detailed Implementation

[0042] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated; they can be combined with each other to achieve better technical effects. In the accompanying drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components, which can be applied to different embodiments.

[0043] This invention discloses a device and method for testing the mechanical strength and real-time monitoring of hydration parameters of multi-size infill bodies. The device includes detachable side plates, a permeable bottom plate, a rubber sealing strip, and a multi-functional top plate. The side plates and the permeable bottom plate are connected via grooves and sealed with the sealing strip, allowing for the formation of test block molds ranging from 100mm*100mm*100mm to 400mm*400mm*400mm. The multi-functional top plate is divided into four areas: Area A houses temperature, humidity, and heat flow sensors via heat-conducting copper pipes; Area B contains a matrix suction sensor; Area C contains moisture content and conductivity sensors; and Area D uses a stainless steel mesh to pre-divide the mechanical testing module. Furthermore, the module can be placed in a standard curing chamber for curing, thus integrating the mechanical strength testing and real-time monitoring of hydration parameters of multi-size infill bodies. This eliminates the need for subsequent segmentation steps, improving experimental efficiency and accuracy, and providing support for exploring the correlation between the mechanical strength and hydration parameters of multi-size infill bodies.

[0044] Specifically, the technical solution of the present invention first provides a device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters, including: Multiple elongated side plates made of polymer plastic or non-metallic material with fixing grooves; upper and lower connecting grooves are provided on the upper and lower sides, and corresponding through threaded holes are provided at the upper and lower connecting grooves, and multiple fixing grooves are evenly arranged on the inner side for fixing other side plates.

[0045] A permeable base plate made of polymer plastic or non-metallic material is provided with evenly distributed base plate fixing grooves and permeable mesh, and threaded holes are provided in the corresponding multi-functional top plate A area.

[0046] The grooves in the permeable bottom plate and the side plate are matched and have the same specifications, allowing for a tight connection. They are also equipped with multiple rubber sealing strips of the same specifications but different lengths, as well as multiple cylindrical sealing strips.

[0047] The multifunctional top plate is made of polymer plastic or non-metallic materials and is divided into four areas A, B, C, and D, each accounting for 1 / 4 of the total area. Each area can be equipped with different functions to perform synchronous multi-dimensional monitoring and pretreatment of the test blocks. Area A has a through hole; Area B is equipped with a matrix suction sensor fixing device; Area C is equipped with moisture content and conductivity sensor fixing devices; Area D is a 1 / 4 notch that can be used as a pouring port and as a pretreatment section for mechanical testing.

[0048] The four side walls of the box-shaped frame are all detachable and combinable; the inner side of the side walls is provided with side plate positioning grooves, the upper and lower sides are provided with side plate connecting grooves, and the bottom plate is provided with a bottom plate insertion positioning groove; the bottom plate slots are used for disassembling and replacing the permeable bottom plate. The box frame can be used to make four types of standard specimens through the free combination of its side plates, including but not limited to 100mm*100mm*100mm cubes, 200mm*200mm*200mm cubes, 300mm*300mm*300mm cubes, and 400mm*400mm*400mm cubes.

[0049] The side plates are connected to each other by threaded holes on the side plate connecting groove to adjust the height of the side plates. The cross-sectional dimensions can be adjusted by using the side plate positioning groove. The combined side plates are tightly fitted to the upper surface of the permeable bottom plate. The permeable bottom plate is detachably connected to the box-shaped frame by being embedded in the bottom plate positioning groove.

[0050] In a preferred embodiment, the ABC section can be further equipped with a hydration consolidation monitoring sensor, the notch section D is a set pouring inlet, and a mechanical test pretreatment area.

[0051] In a preferred embodiment, the maintenance monitoring box frame is made of polymer plastic or non-metallic material. When the box frame is made of polymer plastic or non-metallic material, after the curing of the poured filling body is completed, the side plate and permeable bottom plate assembly can be directly disassembled to remove the test specimens.

[0052] In a preferred embodiment, the side plates can be combined and disassembled according to the size requirements of the experimental specimen by using the threaded holes at the upper and lower connecting grooves, thereby changing the height and cross-sectional size of the experimental specimen and obtaining curing specimens of different sizes.

[0053] In a preferred embodiment, after selecting appropriate dimensions and combining them, the curing frame is tightly connected and fixed by the grooves. Corresponding rubber sealing strips can be used to seal the grooves and the threaded holes at the bottom, forming a regularly shaped filled curing body. Specifically, after determining the size of the filled body test block to be manufactured, the frame can use rubber sealing strips of different lengths to seal the grooves on the side plates and bottom plate; and use cylindrical sealing strips to seal the threaded holes on the bottom plate to ensure the regular shape of the filled body test block and reduce experimental errors.

[0054] In a preferred embodiment, if the mold is only used as an experimental specimen, the demolding time depends on the properties of the cementitious material; after curing, the permeable base plate and side plates of the polymer plastic material or non-metallic material are directly peeled off to obtain the filling specimen of the required size.

[0055] In a preferred embodiment, if real-time monitoring of the hydration parameters of the filling material and mechanical testing pretreatment of the mold are required, a multi-functional cover plate can be added: A certain number of hollow heat-conducting copper tubes can be embedded in the through-hole in area A, and the sensor can be inserted into the hollow copper tube to realize data acquisition; The monitoring sensor for Zone B can be a matrix suction sensor, which is inserted into the slurry through a cover plate to collect data in real time.

[0056] Zone C can be equipped with an integrated moisture content and electrical conductivity sensor, which is embedded inside the filling specimen through a pre-set installation structure on the cover plate, enabling real-time acquisition of moisture content and electrical conductivity data of the specimen.

[0057] Area D is the notch in the cover plate, where an isolation stainless steel screen can be installed. After the hydration parameters in areas A, B, and C are monitored and the data is processed, the stainless steel screen in area D can be disassembled, eliminating the need for a segmentation step, to directly obtain a standard mechanical testing module. The strength of this module can then be calculated through mechanical testing and compared with the hydration monitoring data to further explore the correlation between the mechanical strength of the filling material and the hydration parameters.

[0058] Therefore, the multifunctional cover plate can divide the filling specimen into four parts, each part corresponding to the monitoring of the filling hydration parameters, including the sensor installation function and the pretreatment of the filling mechanical test.

[0059] In a preferred embodiment, the multifunctional cover plate has evenly distributed through holes. A number of hollow copper tubes with a diameter of 8mm, spaced 50mm apart, are fixed at the threaded holes in the base plate for mounting temperature and humidity sensors. The sensors are inserted into the hollow copper tubes to collect data. The sensor placement area is limited to region A of the filled specimen.

[0060] In a preferred embodiment, the monitoring equipment is selected as follows: temperature monitoring can be performed using an RC-4H type temperature and humidity recorder, and heat flux density monitoring can be performed using an HFP01 type heat flux sensor. The above equipment is used to monitor and record the temperature and humidity changes during the hydration heat release process of the filling body in real time.

[0061] In a preferred embodiment, a multifunctional cover plate can fix a matrix suction sensor, with the sensor's placement area limited to region B of the filling specimen. A MeterTeros21 sensor can be used, with data acquired in real time by inserting the cover plate into the slurry.

[0062] In a preferred embodiment, the multifunctional cover plate can be equipped with an integrated moisture content and conductivity sensor, with the sensor's deployment range limited to region C of the filling specimen. A 5TE type sensor can be selected to perform the relevant parameter monitoring task. This sensor is embedded inside the filling specimen through a pre-set mounting structure on the cover plate and can collect the moisture content and conductivity data of the specimen in real time.

[0063] In a preferred embodiment, an insulating stainless steel mesh can be arranged at the D-notch of the multifunctional cover plate. This mesh, secured with wire, forms a 50mm*50mm*50mm cubic grid, eliminating the need for segmentation of the filling adhesive after curing. After curing, the area can be directly tested for mechanical properties by removing the mesh.

[0064] Example like Figure 1 As shown, this embodiment provides a real-time monitoring device for hydration parameters of multi-size filling bodies under temperature-stress coupling conditions, including: a side plate made of polymer plastic or non-metallic material 1; an upper connecting groove 2; bolt holes in the upper connecting groove 3; a lower connecting groove 4; bolt holes in the lower connecting groove 5; a side plate fixing groove 6; 3mm bolts 7; a permeable bottom plate made of polymer plastic or non-metallic material 8; a bottom plate fixing groove 9; a permeable mesh 10; threaded holes in the bottom plate 11; a rubber sealing strip 12; a threaded heat-conducting copper pipe 13; a stainless steel screen 14; a multi-functional top plate made of polymer plastic or non-metallic material 15; a top plate penetration hole 16; a matrix suction sensor fixing device 17; a MeterTeros21 sensor 18; a moisture content and conductivity sensor fixing device 19; and a 5TE type sensor 20. All side panels of the enclosure are removable. The side panels are made of polymer plastic or non-metallic material and are 460mm long, 100mm wide (excluding the upper and lower connecting grooves), and 10mm thick. The inner fixing groove is 10mm wide, 5mm deep, and 100mm long. A fixing groove is set every 100mm. The groove on the right end is 20mm from the edge. The upper and lower sides are provided with connecting grooves with a thickness of 5mm. The connecting grooves are provided with through threaded holes, which are 130mm and 350mm away from the farthest end, respectively, and the hole diameter is 3mm. The permeable base plate, made of polymer plastic or non-metallic material, is a 460mm*460mm*250mm cuboid with evenly distributed bottom grooves spaced 100mm apart. Each groove is 460mm long, 5mm deep, and 10mm wide, with a 5mm distance from the edge. The base plate also features threaded holes corresponding to the multi-functional A area, with a diameter of 8mm and a depth of 10mm. Multiple threaded holes are arranged at 50mm intervals, totaling 25 holes. A permeable grid is also provided, which can be adjusted according to the specific conditions of the experimental curing filling to meet specific needs. The side plate grooves and the permeable floor grooves are of the same specifications and can be directly embedded at the side plate connection points to form a stable curing box structure. After determining the curing dimensions, rubber sealing strips of different lengths (10mm wide, 5mm thick) and 8mm diameter, 10mm long can be used to seal the bottom, side plate grooves, and threaded holes inside the curing box before pouring, thereby obtaining a regular filling curing body and reducing experimental errors.

[0065] Figure 1 The system uses 16 side plates connected by bolt holes to maintain a filling body test block with a size of 400mm*400mm*400mm. After assembling the box structure of the 400mm*400mm*400mm filled specimen, a multi-functional cover plate is added to it, which can be used for various hydration monitoring and mechanical test pre-segmentation. The specific process is as follows: The multi-functional cover plate is made of a 470mm*470mm*10mm polymer plastic or non-metallic material. A 1 / 4 section of the base plate features 25 threaded holes with a uniform 50mm spacing and an 8mm diameter, used to house 8mm diameter heat-conducting copper pipes. These pipes pass through the top plate's penetration holes, ensuring even distribution. Temperature and humidity sensors can be inserted into these hollow copper pipes for data acquisition and analysis of temperature and humidity changes in the filling material during curing. Another 1 / 4 section houses a matrix suction sensor at its center, which is inserted into the slurry through the cover plate for real-time data acquisition. A further 1 / 4 section contains moisture content and conductivity sensors, allowing for the selection of appropriate sensors to monitor relevant parameters. The sensor is embedded inside the filling specimen through a pre-installed structure on the cover plate, enabling real-time acquisition of the specimen's moisture content and electrical conductivity data. The remaining 1 / 4 of the cover plate can be directly cut off and used as a pouring inlet. This inlet can be formed by dividing the cover plate into 25 pieces of 200mm*200mm stainless steel mesh, securing them with wire ties to create a 50mm*50mm*50mm cubic grid. This grid is then placed into the 1 / 4 area. After curing, a regular mechanical test specimen can be obtained through the isolation effect of the mesh. The mechanical strength parameters of the filling can be analyzed through experiments such as uniaxial compression tests, acoustic emission signal monitoring tests, longitudinal wave velocity and initial porosity tests. The above operation process allows for the study of the mechanical strength and hydration parameters of the filling.

[0066] Figure 2 To prepare a 100mm*100mm*100mm infill specimen, four side plates are selected, and a standard fixed square of the permeable base plate is selected as the edge line. The side plates and the base plate are connected in sequence, and mortar is injected to obtain the specimen of the corresponding size.

[0067] Figure 3 To prepare a 200mm*200mm*200mm filling body test block, eight side plates were selected. First, four two-layer combined side plates were obtained by fixing them with bolts through the threaded holes on the upper and lower connecting grooves of the side plates. Then, four standard fixed squares of the permeable bottom plate were selected as the edge lines, and the side plates and the permeable bottom plate were connected in sequence. After injecting mortar, the corresponding size test piece was obtained.

[0068] Figure 4 To prepare a 300mm*300mm*300mm infill specimen, 12 side plates were selected. First, four three-layer combined side plates were obtained by fixing them with bolts through the threaded holes on the upper and lower connecting grooves of the side plates. Then, 9 standard fixed squares of the permeable base plate were selected as the edge lines, and the side plates and the permeable base plate were connected in sequence. Mortar was then injected to obtain the specimen of the corresponding size.

[0069] Figure 5To prepare a 400mm*400mm*400mm infill specimen, 16 side plates were selected. First, four four-layer combined side plates were obtained by fixing them with bolts through the threaded holes on the upper and lower connecting grooves of the side plates. Then, the 16 standard fixed squares of the permeable base plate were selected as the edge lines, and the side plates and the permeable base plate were connected in sequence. After injecting mortar, the specimen of the corresponding size was obtained.

[0070] Figure 6 The diagram shows the arrangement of the heat-conducting copper pipes for temperature and humidity monitoring of a 400mm*400mm*400mm filling body, and the arrangement of the stainless steel screen for mechanical property testing of the specimen. The layout in the diagram is for reference only and can be adjusted appropriately according to the actual situation.

[0071] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for testing the mechanical strength of multi-size filling materials and for real-time monitoring of hydration parameters, characterized in that, Used for preparing filling bodies, as well as for preparing filling test blocks and monitoring parameters during the hydration exothermic process; among which, When used to prepare filling bodies, the device includes: combinable and detachable side panels and a permeable bottom plate; The side panel is composed of multiple side panels that are interlocked with each other. The permeable bottom plate is provided with multiple mutually perpendicular side plate fixing grooves, and the side baffle can be embedded in the side plate fixing grooves, thereby forming an adjustable filling space for preparing the filling body; When used for monitoring parameters of the hydration heat release process, the device further includes: a multi-functional top plate and a dividing screen. The multifunctional top plate covers the filling space and divides the filling space into multiple functional areas, including: a pouring inlet and a multiple parameter monitoring sensor arrangement area; the pouring inlet is equipped with a dividing screen to form multiple cubic grid filling spaces for preparing filling test blocks.

2. The device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters according to claim 1, characterized in that, Each side plate has a first groove and a first protrusion at its top and bottom, respectively. Both the first groove and the first protrusion have through threaded holes, and the threaded holes correspond to each other. The first protrusion of the side plate is respectively engaged with the first groove and the side plate fixing groove provided on the permeable bottom plate. Each side plate has multiple second grooves vertically arranged on its surface and a second protrusion on one side of the side plate, with the second protrusion and the second grooves fitting together.

3. The device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters according to claim 2, characterized in that, The multiple second grooves vertically provided on the side plate surface and the multiple side plate fixing grooves provided on the permeable bottom plate are all equidistantly arranged, and the spacing between them is the same.

4. The device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters according to claim 1, characterized in that, The multiple functional areas include: The first functional area includes multiple penetrations, with a heat-conducting metal tube inserted into each penetration, and a sensor installed in the heat-conducting metal tube. The second and third functional areas have sensor fixing devices arranged at the center, so that the sensors are located in the second and third functional areas; The fourth functional area serves as the pouring inlet, where multiple filling test blocks are prepared using the segmented screen for mechanical testing pretreatment.

5. The device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters according to claim 4, characterized in that, In the first functional area, multiple penetrations are arranged at equal intervals.

6. The multi-size filling body mechanical strength testing and hydration parameter real-time monitoring device according to claim 4, characterized in that, The permeable bottom plate is also provided with a permeable grid, and the permeable bottom plate is provided with multiple threaded holes corresponding to the first functional area of ​​the multifunctional top plate; In the first functional area, the heat-conducting metal tube is inserted into the corresponding threaded hole on the base plate for fixation.

7. The device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters according to claim 4, characterized in that, The first functional area is equipped with an RC-4H type temperature and humidity recorder and an HFP01 type heat flow sensor; The second functional area is equipped with a matrix suction sensor; The third functional area is equipped with an integrated moisture content and conductivity sensor.

8. The device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters according to claim 1, characterized in that, On the side plate, the second groove at the farthest end of the second protrusion relative to the side edge is at a certain distance from the edge; On the permeable bottom plate, the side plate fixing groove is at a certain distance from the edge.

9. The device for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters according to claim 1, characterized in that, The device also includes a sealing strip for sealing grooves and threaded holes.

10. A method for testing the mechanical strength of multi-size filling bodies and real-time monitoring of hydration parameters, characterized in that, The operation of the multi-size filling body mechanical strength testing and hydration parameter real-time monitoring device according to any one of claims 1 to 9 includes: preparing the filling body, preparing the filling test block, and monitoring parameters during the hydration heat release process; wherein... When preparing the filling material, the method includes: According to the required size, multiple side plates are selected and connected to each other with bolts through threaded holes to form a side baffle. The side baffle is then embedded in the side plate fixing groove provided on the permeable bottom plate to form a filling space of the specified size. Casting is used to prepare the filling material; When preparing the filling test block and monitoring parameters during the hydration exothermic process, the method includes: Multiple side plates are selected and connected to each other with bolts through threaded holes to form a side baffle. The side baffle is then embedded in the side plate fixing groove provided on the permeable bottom plate to form a filling space. The multifunctional top plate is covered over the filling space, and the filling space is divided into multiple functional areas, including: a pouring inlet and an area for arranging multiple parameter monitoring sensors; Sensors are arranged in the area where multiple parameter monitoring sensors are deployed; A segmented screen is inserted into the pouring inlet to form multiple cubic grid filling spaces; The filling test blocks were prepared by casting, and the parameters and data were monitored and recorded during the hydration heat release process.

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