A detachable and assembled expansion test board

Abstract

The utility model relates to building material performance detection technical field, concretely relates to a kind of detachable, assembled extension degree test board, including multiple assembled test boards, the assembled test board is square structure, the side of multiple assembled test boards is detachably provided with connecting structure, the top end and bottom end of assembled test board are provided with concentric circular arc line for measuring concrete ductility, the connecting structure includes the insertion structure for guiding and the locking structure for fixing.The modular unit of assembled test board can be replaced or repaired individually, further prolongs the service life of assembled test board;The spacing of the concentric circular arc line on the module surface is uniform, for directly measuring the diameter and extension degree change after the expansion of concrete;Through the setting of clamping groove and rotating buckle between modules, quick assembly and disassembly are realized, and the size of test area can be adjusted as required.

Description

Technical Field

[0001] This utility model relates to the field of building material performance testing technology, specifically to a detachable and assembleable expansion test plate. Background Technology

[0002] In the field of building construction, the spreadability test of concrete is an important means of evaluating its fluidity and workability.

[0003] Traditional susceptibility testing boards are typically fixed-size monolithic structures, which present several problems: Traditional boards are large, making it impossible to flexibly adjust the testing area according to the susceptibility range of concrete. Transportation and storage are inconvenient: the large size of traditional boards leads to high transportation and storage costs. Adaptability is poor: they cannot meet the needs of construction sites or laboratories for testing areas of different sizes.

[0004] Patent CN201620685794.4 proposes an assembled self-compacting concrete spread test plate, including a base plate for placing a slump cylinder. The base plate has spread scale markings and includes four partition plates evenly divided along the center line. Each partition plate has two mounting sides. The spread test plate is composed of four partition plates, which are connected and positioned by protrusions and slots. It is simple to use and easy to clean after use, effectively solving the problems of large size and inconvenience of handling and storage of existing integral test plates. However, this device is spliced ​​by combining protrusions and slots of adjacent partition plates. With the increase of use, the cross-section of the connecting port will change, which can easily lead to gaps in the spliced ​​test plate, making it easy to loosen and affecting the observation results.

[0005] Therefore, it is necessary to invent a detachable and assembleable expansion test board to solve the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a detachable and assembleable expansion test board to solve the problems of fixed size, inconvenient transportation and storage of existing test boards.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A detachable and assembleable ductility test plate includes multiple assembled test plates, each having a square structure. The sides of the assembled test plates are provided with detachable connecting structures. The top and bottom of each assembled test plate are provided with concentric arc lines for measuring the ductility of concrete. The connecting structures include a guiding insertion structure and a locking structure for fixing.

[0009] As a preferred embodiment of this utility model, the concentric arc at the top of the assembled test board is a 90-degree arc, and multiple arcs are arranged at equal distances along the radial direction, and all the assembled test boards form multiple concentric circles after assembly.

[0010] As a preferred embodiment of this utility model, the connection structure includes a slot and a block, the slot and the block being located on the two end faces of the assembled test board near the center of the arc, and the slot being used to insert the block of the adjacent side wall of the assembled test board.

[0011] As a preferred embodiment of the present invention, the locking structure includes a rotating buckle and a buckle groove, the rotating buckle and the buckle groove being located on the two end faces of the assembly test board away from the center of the arc, and the rotating buckle and the assembly test board forming a hinge connection.

[0012] After multiple test panels are assembled, multiple rotating buckles are rotated to preset positions, and the protruding ends of the rotating buckles engage with the buckle slots of adjacent test panels.

[0013] As a preferred embodiment of this utility model, the end face of the assembly test plate facing the slot is provided with a second slot, the outer side of the rotating end of the rotating buckle is fitted with a transmission tooth block, and the inner side of the second slot is slidably provided with a rack for meshing with the transmission tooth block.

[0014] As a preferred embodiment of this utility model, the end face of the assembly test board facing the card block is provided with a slot one, and an ejector block is slidably arranged inside the slot one. One end of the ejector block is provided with an ejector spring for pushing the ejector block. The position of the ejector block is adapted to the slot two. When multiple assembly test boards are assembled, the ejector block squeezes the rack, causing the rotating buckle to engage with the buckle slot.

[0015] As a preferred embodiment of this utility model, the concentric arc at the bottom of the assembled test board consists of multiple concentric circles.

[0016] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0017] In this invention, the assembled test plate is suitable for testing the spread of concrete, especially for scenarios requiring frequent adjustments to the size of the test area, such as construction sites or laboratories. The modular design of the assembled test plate significantly reduces transportation and storage costs, making it easy to carry and assemble on-site. The modular units of the assembled test plate can be replaced or repaired individually, further extending the service life of the assembled test plate. The concentric arcs on the surface of the modules are evenly spaced, allowing for direct measurement of the diameter and spread changes after concrete expansion. The modules are connected by slots and rotating buckles, enabling rapid assembly and disassembly, and the size of the test area can be adjusted as needed. Attached Figure Description

[0018] Figure 1 A top view of the top surface of a single module unit of a detachable and assembleable expansion test board.

[0019] Figure 2 A top view of the lower surface of a single module unit of a detachable and assembleable expansion test board.

[0020] Figure 3 A 3D view of a single module unit of a detachable and assembleable expansion test board.

[0021] Figure 4 This is a top view of the detachable and assembleable expansion test board.

[0022] Figure 5 This is a 3D view of the detachable and assembleable expansion test board.

[0023] Figure 6 This is a top view of the assembled detachable and modular expansion test board.

[0024] Figure 7 A magnified view of a single module unit of a detachable and assembleable scalability test board. Figure 1 .

[0025] Figure 8 A magnified view of a single module unit of a detachable and assembleable scalability test board. Figure 2 .

[0026] Figure 9 This is a schematic diagram of the locking structure at the connection point of the assembled test board.

[0027] Explanation of reference numerals in the attached diagram: 1. Assembled test board; 2. Slot; 3. Rotating buckle; 4. Block; 5. Buckle slot; 6. Transmission gear block; 7. Rack; 9. Ejection spring; 10. Ejection block; 11. Slot 1; 12. Slot 2. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0029] This utility model provides, for example Figure 1-9 The diagram shows a detachable and assembleable expansion test plate, comprising multiple assembled test plates 1, each assembled test plate 1 having a square structure. The sides of the multiple assembled test plates 1 are provided with detachable connecting structures. The top and bottom ends of each assembled test plate 1 are provided with concentric arc lines for measuring the ductility of concrete. The connecting structures include an insertion structure for guidance and a locking structure for fixing.

[0030] The dimensions of the assembled test plate 1 are 350mm×350mm×10mm. The shape and size of the assembled test plate 1 can be combined and assembled as needed to meet the concrete spreadability test requirements of different slump ranges.

[0031] The concentric arc at the top of the assembled test plate 1 is a 90-degree arc, with multiple arcs arranged at equal intervals along the radial direction, and all assembled test plates 1 form multiple concentric circles. Each arc in the 90-degree arc is spaced 20mm apart, and the concrete expansion range that can be tested when four units are assembled is 0-680mm.

[0032] The connection structure includes a slot 2 and a block 4, which are located on the two end faces of the assembled test plate 1 near the center of the arc, respectively. The slot 2 is used to insert the block 4 onto the side wall of the adjacent assembled test plate 1. The slot 2 and the block 4 facilitate the positioning and installation of the assembled test plate 1, reducing the installation difficulty.

[0033] The locking structure includes a rotating buckle 3 and a buckle groove 5. The rotating buckle 3 and the buckle groove 5 are respectively located on the two end faces of the assembly test plate 1 away from the center of the arc. The rotating buckle 3 and the assembly test plate 1 are hinged together.

[0034] After multiple assembly test boards 1 are assembled, multiple rotating buckles 3 are rotated to preset positions, and the protruding ends of the rotating buckles 3 are engaged in the buckle grooves 5 of adjacent assembly test boards 1.

[0035] When the protruding ends of the multiple rotating buckles 3 separate from the buckle grooves 5, the assembly test board 1 can be disassembled.

[0036] The concentric arc at the bottom of the assembled test plate 1 consists of multiple concentric circles, and its measurement range is smaller than that at the top. The lower surface is a complete circle, with each concentric circle spaced 20mm apart. The concrete expansion range that can be tested by a single unit is 0-320mm, which can adapt to different testing environments.

[0037] The assembly test plate 1 has a slot 2 12 on the end face facing the slot 2. A transmission gear block 6 is fitted on the outer side of the rotating end of the rotating buckle 3. A rack 7 for meshing with the transmission gear block 6 is slidably arranged on the inner side of the slot 2 12. The slot 2 12 has a limiting groove to prevent the rack 7 from falling off. After the assembly test plate 1 is separated, the rotation of the rotating buckle 3 can drive the rack 7 to slide and reset, reducing the difficulty of subsequent assembly.

[0038] The assembly test plate 1 has a slot 11 on its end face facing the locking block 4. An ejector block 10 is slidably disposed inside the slot 11. One end of the ejector block 10 is equipped with an ejector spring 9 for pushing the ejector block 10. The position of the ejector block 10 is adapted to the slot 12. When multiple assembly test plates 1 are assembled, the ejector block 10 presses against the rack 7, causing the rotating latch 3 to engage with the latch groove 5. The rack 7 and the transmission rack 6 are in a meshing state. By pressing the rack 7 against the ejector block 10, the rotating latch 3 can slide towards the side where the adjacent assembly test plate 1 is located. The ejector spring 9 and the slot 11 also allow for the storage of the ejector block 10, reducing the difficulty of alignment and assembly.

[0039] The assembled test board 1 is made of high-strength engineering plastic, and its surface has an anti-slip texture to improve the durability and stability of the test board, preventing it from sliding during placement.

[0040] The assembled test board 1 is modular, which facilitates individual replacement or repair, and further extends the service life of the assembled test board 1.

[0041] Assembly and usage of the test board

[0042] Step 1: Module Preparation

[0043] Take out four square modular units (350mm×350mm×10mm) and check whether the slots and buckles on the edges of each module are intact and whether the concentric arcs on the surface are clearly visible (the upper surface is a 1 / 4 arc and the lower surface is a complete circle).

[0044] Step Two: Basic Assembly

[0045] Single module use: To test the 0-320mm extension range, the entire lower surface circle of a single module can be used for measurement. Place the module horizontally on the test platform, ensuring the anti-slip texture is in contact with the platform to enhance stability.

[0046] Four-module assembly: To test the 0-680mm expansion range, connect the four modules sequentially using slots and clips (e.g., Figure 4 (As shown). The specific steps are as follows:

[0047] a. Align the clips of the first module with the slots on the edge of the second module and press vertically until they are fully engaged.

[0048] b. Repeat the above steps to assemble the four modules into a square test board (e.g., Figure 6 (As shown), check whether the connection is tight and without gaps.

[0049] Step 3: Testing Operation

[0050] 1) Pour the freshly mixed concrete into the center area of ​​the test plate and slowly raise the slump cone to allow the concrete to flow freely.

[0051] 2) After the concrete stops flowing, measure the maximum expansion diameter along the upper 1 / 4 arc (which forms a complete concentric circle after assembly). The expansion value corresponds to each arc at 20mm intervals, and the result can be read directly.

[0052] 3) If the extended range exceeds that of a single module, the test area can be expanded by assembling four modules to ensure measurement accuracy.

[0053] Step 4: Disassembly and Storage

[0054] 1) After the test is completed, gently push the edge of the module along the direction of the snap connection to separate each unit one by one.

[0055] 2) Clean the surface of the modules to remove any residual concrete, and stack them for storage to save space.

[0056] Example 1: Large-scale expansion test at the construction site

[0057] Application scenarios:

[0058] A highway construction site requires testing of highly fluid ready-mixed concrete (design spread 550mm ± 30mm). The ambient temperature is 35℃, the humidity is 65%, and the ground in the test area is slightly tilted.

[0059] Operating procedures:

[0060] 1) Assemble the test board:

[0061] a. The operator moves the four modules to the test point and checks that the slots and buckles are free of mud and sand blockage.

[0062] b. Assemble the modules in a clockwise direction, applying 10N of pressure after connecting every two modules to ensure a tight fit.

[0063] c. After assembly, use a level to adjust the position of the test plate to ensure that the overall plane level deviation is ≤1mm.

[0064] 2) Concrete testing:

[0065] a. Place the slump cone vertically in the center of the test plate, and fill it with freshly mixed concrete in three layers, tamping each layer 25 times to remove air bubbles.

[0066] b. After slowly raising the slump cone, the concrete flowed freely to a stable state, and the maximum expansion diameter was measured to be 628 mm.

[0067] c. The operator quickly determined the expansion to be 628mm by observing the concentric arcs (20mm intervals) on the upper surface, which meets the design requirements.

[0068] 3) Result processing and disassembly:

[0069] a. After recording the test data, use a scraper to remove any residual concrete from the surface to prevent it from hardening and affecting subsequent use.

[0070] b. When disassembling, start by gently pushing the clips from the edge modules, and then put them into the carrying case one by one after separating them.

[0071] Example 2: Small-scale precision testing in the laboratory

[0072] Application scenarios:

[0073] A building materials laboratory needs to verify the effectiveness of mix design optimization for low-flow self-compacting concrete (spread ≤ 300mm). The laboratory environment is maintained at a constant temperature of 20℃ and humidity of 50%.

[0074] Operating procedures:

[0075] 1) Single-module test preparation:

[0076] a. Select a single module and check the clarity of the complete circular scale lines on the lower surface (0-320mm, 20mm interval).

[0077] b. Fix the module on the vibration table to simulate actual pouring conditions.

[0078] 2) Concrete testing:

[0079] a. Pour the freshly mixed concrete in two batches, turning on the vibrating table (frequency 50Hz, duration 10 seconds) after each batch to simulate the vibration effect.

[0080] b. After the concrete spread and stabilized, the maximum diameter was measured to be 286 mm, and the result was read directly through the concentric circles on the lower surface.

[0081] c. The test was repeated 3 times. The expansion range was 284-288mm, and the standard deviation was ≤1.5mm, which proved that the accuracy of the test board met the standard requirements.

[0082] 3) Data comparison and optimization:

[0083] a. The test results were compared with those of unoptimized concrete (240mm spread), and the fluidity was determined to be improved by 18%.

[0084] b. Adjust the admixture dosage based on the data (increase from 1.2% to 1.5%), and the final spread reaches 305mm, meeting the design requirements.

[0085] This utility model provides an assembly test plate 1 suitable for testing the spread of concrete, especially suitable for scenarios requiring frequent adjustments to the size of the test area, such as construction sites or laboratories. The modular design of the assembly test plate 1 significantly reduces transportation and storage costs, making it easy to carry and assemble on-site. The modular units of the assembly test plate 1 can be replaced or repaired individually, further extending the service life of the assembly test plate 1. The concentric arcs on the surface of the modules are evenly spaced, allowing for direct measurement of the diameter and spread changes of the concrete after expansion. The modules are connected by slots 2 and rotating buckles 3, enabling quick assembly and disassembly, and allowing adjustment of the test area size as needed.

[0086] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A detachable and assembleable expansion test board, characterized in that: It includes multiple assembled test plates (1), each of which has a square structure. The sides of the multiple assembled test plates (1) are provided with detachable connection structures. The top and bottom of each assembled test plate (1) are provided with concentric arcs for measuring the ductility of concrete. The connection structure includes an insertion structure for guidance and a locking structure for fixing.

2. The detachable and assembleable expansion test board according to claim 1, characterized in that: The concentric arc at the top of the assembled test board (1) is a 90-degree arc. Multiple arcs are set at equal distances along the radial direction, and all the assembled test boards (1) form multiple concentric circles after assembly.

3. The detachable and assembleable expansion test board according to claim 2, characterized in that: The connection structure includes a slot (2) and a block (4). The slot (2) and the block (4) are located on the two end faces of the assembly test board (1) near the center of the arc, respectively. The slot (2) is used to insert the block (4) on the side wall of the adjacent assembly test board (1).

4. The detachable and assembleable expansion test board according to claim 2, characterized in that: The locking structure includes a rotating buckle (3) and a buckle groove (5). The rotating buckle (3) and the buckle groove (5) are located on the two end faces of the assembly test plate (1) away from the center of the arc, respectively. The rotating buckle (3) and the assembly test plate (1) are hinged. After multiple assembly test boards (1) are assembled, multiple rotating buckles (3) are rotated to the preset position, and the protruding end of the rotating buckle (3) is engaged in the buckle groove (5) of the adjacent assembly test board (1).

5. The detachable and assembleable expansion test board according to claim 4, characterized in that: The assembly test plate (1) has a slot 2 (12) on the end face facing the slot (2). The rotating end of the rotating buckle (3) is fitted with a transmission tooth block (6). The inner side of the slot 2 (12) is slidably provided with a rack (7) for meshing with the transmission tooth block (6).

6. The detachable and assembleable expansion test board according to claim 5, characterized in that: The assembly test board (1) has a slot one (11) on the end face facing the card block (4). A push-out block (10) is slidably arranged on the inner side of the slot one (11). A push-out spring (9) for pushing the push-out block (10) is provided at one end of the push-out block (10). The position of the push-out block (10) is adapted to the slot two (12). When multiple assembly test boards (1) are assembled, the push-out block (10) squeezes the rack (7) and drives the rotating buckle (3) to engage with the buckle groove (5).

7. The detachable and assembleable expansion test board according to claim 2, characterized in that: The concentric arc at the bottom of the assembled test board (1) consists of multiple concentric circles.

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