A high-performance anti-freezing concrete anti-freezing performance test sampling mold

Abstract

This application discloses a high-performance antifreeze concrete sampling mold for testing the antifreeze performance of concrete, including a base, a top cover, and multiple assemblies. The base is connected to a fixing plate on opposite sides, and the fixing plate has a vertical first groove on opposite sides. The top surface of the base has a horizontal second groove on both sides. The first groove and the second groove are connected. The assemblies have a first protrusion on both sides and a second protrusion on the bottom side. The first protrusion and the first groove form a mortise and tenon structure, and the second protrusion and the second groove form a mortise and tenon structure. The top cover has a pouring port at its center.

Description

Technical Field

[0001] This utility model relates to the field of concrete performance testing technology, specifically to a sampling mold for testing the frost resistance of high-performance frost-resistant concrete. Background Technology

[0002] Currently, traditional steel or plastic molds are mostly used for sampling in concrete frost resistance testing. These molds typically consist of a base, side plates, and a top cover, assembled with bolts or clips to form a cubic cavity (commonly 100mm×100mm×100mm standard size), used to pour concrete specimens for frost resistance testing such as freeze-thaw cycles. The assembly of existing molds largely relies on mechanical connections, with the side plates and base primarily engaging in planar contact. The top cover often has a straight cylindrical inlet, and concrete is filled into the cavity through manual vibration or natural pouring.

[0003] However, existing molds have significant shortcomings for high-performance freeze-thaw resistant concrete (such as high-flowability concrete with a slump of 180 mm): First, the joints are poorly sealed, and high-flowability concrete is prone to leakage from the gaps, resulting in chipped edges and corners of the specimens and affecting dimensional accuracy. Second, the straight-cylinder inlet lacks a flow guiding structure, and coarse aggregate is prone to segregation due to gravity during concrete pouring, causing uneven density in the upper and lower parts of the specimen, which in turn leads to inaccurate freeze-thaw test data. Third, traditional connection methods (such as bolts) are prone to generating local stress during disassembly, which can damage specimens with low early strength, such as those at 3 days, affecting test accuracy. In addition, some mold cavities have large dimensional errors, which cannot meet the strict requirements for specimen dimensional accuracy (such as ±0.5 mm) in freeze-thaw performance testing, further reducing the reliability of test results. Utility Model Content

[0004] The present invention aims to provide a high-performance sampling mold for testing the frost resistance of concrete, so as to solve the technical problems of traditional sampling molds for testing the frost resistance of concrete, such as easy leakage of grout in high slump concrete, easy segregation of specimens, easy damage to early strength specimens during disassembly and assembly, and insufficient dimensional accuracy.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a high-performance antifreeze concrete frost resistance testing sampling mold, including a base, a top cover and multiple assemblies. The base has a fixing plate connected to its opposite sides. The fixing plate has a vertical first groove on its opposite sides and a horizontal second groove on its top sides. The first groove and the second groove are connected. The assemblies have a first protrusion on both sides and a second protrusion on its bottom side. The first protrusion and the first groove form a mortise and tenon structure, and the second protrusion and the second groove form a mortise and tenon structure. The top cover has a pouring port at its center.

[0006] The working principle of this utility model is as follows: During assembly, the assembly component is inserted into the vertical first groove of the fixing plate through the first protrusion on both sides, and the second protrusion at the bottom is simultaneously embedded into the horizontal second groove of the base. The interlocking action of the mortise and tenon structure makes the assembly component tightly connected with the fixing plate and the base to form a closed sampling cavity. During use, the top cover is placed on the top of the assembly component, and concrete is injected into the cavity through the pouring port in the center of the top cover. The stable fit of the mortise and tenon structure ensures that the cavity does not deform during the pouring process. After the pouring is completed, the mortise and tenon structure can be disassembled to remove the molded specimen, thus realizing the sampling of high-performance antifreeze concrete.

[0007] The beneficial effects of this utility model are as follows: 1. Assembly is achieved through a mortise and tenon structure composed of a first protrusion and a first groove, and a second protrusion and a second groove. Compared with traditional bolt or snap-fit ​​connections, the splicing is more stable and there is no local stress concentration during assembly and disassembly, which can reduce damage to concrete specimens with low early strength; 2. The first groove and the second groove are connected, so that the assembled parts can be inserted into the fixing plate in the vertical direction and can also be horizontally limited with the base, improving the overall assembly accuracy and ensuring the stability of the cavity dimensions; 3. The design of multiple assembled parts makes it easy to replace damaged parts individually, reducing maintenance costs and adapting to the flexible assembly needs of specimens of different specifications; 4. The top cover is provided with a pouring port, which can directly guide concrete into the cavity and reduce overflow waste during pouring.

[0008] Furthermore, the top cover is larger than the base. The larger size of the top cover allows it to completely cover the top edge of the base and the assembly, preventing concrete from overflowing from the top gap of the cavity during pouring. It also provides redundant space for the relative positioning of the top cover and the base, avoiding seal failure due to slight misalignment.

[0009] Furthermore, the bottom of the top cover is connected to a pouring block, which has a spiral downward pouring channel inside. The spiral downward pouring channel can guide the concrete to slowly flow into the cavity along the spiral path. The centrifugal force generated by the spiral motion makes the coarse aggregate and mortar mix more evenly, reduces the segregation problem caused by the free fall of high slump concrete, and improves the consistency of the internal density of the specimen.

[0010] Furthermore, the pouring cavity formed by the fixed plate and the assembly components is a 100mm cube. The 100mm cube pouring cavity meets the standard specimen size requirements for concrete freeze-thaw resistance testing. After the specimen is formed, it can be directly used for freeze-thaw cycle tests without secondary cutting or grinding, reducing damage to the specimen structure during processing and ensuring the accuracy of test data.

[0011] Furthermore, a rubber sealing gasket with a thickness of 1-2 mm is provided between the mating surfaces of the first protrusion and the first groove. The rubber sealing gasket can fill the tiny gaps between the mating surfaces of the first protrusion and the first groove, significantly improving the sealing performance of the tenon and mortise structure. It can effectively prevent grout leakage in highly fluid concrete, avoid damage to the edges and corners of the specimen, and ensure the dimensional accuracy of the specimen.

[0012] Furthermore, the lower outlet diameter of the pouring channel is 80-90mm, and the outlet edge is rounded with a radius of 2-3mm. The 80-90mm outlet diameter is suitable for the top surface size of the 100mm cubic cavity, so that the concrete can be evenly spread to the bottom of the cavity after being guided by the spiral channel, reducing local accumulation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the chassis structure of a high-performance antifreeze concrete sampling mold for testing the antifreeze performance of concrete according to this utility model.

[0014] Figure 2 This is a schematic diagram of the assembly structure of a high-performance antifreeze concrete frost resistance testing sampling mold according to the present invention.

[0015] Figure 3 This is a schematic diagram of the top cover structure of a high-performance antifreeze concrete sampling mold for testing the antifreeze performance of concrete according to this utility model.

[0016] The reference numerals in the accompanying drawings include: fixing plate 1, first groove 102, base 2, second groove 201, assembly 3, second protrusion 301, first protrusion 302, top cover 4, pouring block 5, and pouring channel 501. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The basic implementation examples are as follows: Figure 1 - Appendix Figure 3As shown: A high-performance frost-resistant concrete frost-resistant performance testing sampling mold includes a base 2, a top cover 4, and two assemblies 3. A fixing plate 1 is fixedly connected to the opposite left and right sides of the base 2. Vertical first grooves 102 are provided on the opposite sides of the fixing plate 1. Horizontal second grooves 201 are provided on the upper and lower sides of the top surface of the base 2. The first grooves 102 and the second grooves 201 are vertically connected. First protrusions 302 are fixedly connected to both sides of the assembly 3, and second protrusions 301 are fixedly connected to the bottom side of the assembly 3. The first protrusions 302 and the first grooves 102 form a mortise and tenon structure. A rubber sealing gasket with a thickness of 2mm is provided between the mating surfaces of the first groove 102. The second protrusion 301 and the second groove 201 form a mortise and tenon structure. The bottom of the top cover 4 is connected to the pouring block 5. The pouring block 5 has a spiral downward pouring channel 501. The lower end outlet diameter of the pouring channel 501 is 80mm, and the outlet edge has a rounded transition with a radius of 2mm. The center of the top cover 4 has a pouring port that communicates with the pouring channel 501. The size of the top cover 4 is larger than that of the base 2. The pouring cavity formed by the fixed plate 1 and the assembly 3 is a 100mm cube.

[0019] The specific implementation process is as follows: Align the first protrusions 302 on both sides of the assembly 3 with the first groove 102 of the fixing plate 1, and simultaneously align the second protrusion 301 on the bottom side of the assembly 3 with the second groove 201 of the base 2. Push the assembly 3 vertically downwards until the first protrusion 302 is fully embedded in the first groove 102 and the second protrusion 301 is fully embedded in the second groove 201. At this point, the assembly 3 and the fixing plate 1 and base 2 are tightly connected by a mortise and tenon structure, forming a closed sampling cavity. Place the top cover 4 on top of the assembly 3, with the pouring port in the center of the top cover 4 facing the cavity. Pour high-performance antifreeze concrete into the cavity through the pouring port until the cavity is filled. After the concrete has initially set, pull the assembly 3 upwards to disengage the first protrusion 302 from the first groove 102, and simultaneously disengage the second protrusion 301 from the second groove 201. Remove the assembly 3 and the top cover 4 to obtain the formed concrete specimen. This specimen can be directly used for antifreeze performance testing.

[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high performance, freeze resistant concrete freeze resistance testing sampling mold characterized by: The device includes a base, a top cover, and multiple assemblies. The base has a fixing plate connected to its opposite sides. The fixing plate has a vertical first groove on its opposite sides and a horizontal second groove on its top sides. The first and second grooves are connected. The assemblies have a first protrusion on both sides and a second protrusion on its bottom side. The first protrusion and the first groove form a mortise and tenon structure, and the second protrusion and the second groove form a mortise and tenon structure. The top cover has a pouring port at its center.

2. The high performance de-icing concrete de-icing performance testing sampling mold of claim 1, wherein: The size of the top cover is larger than the size of the base.

3. The sampling mold for testing the frost resistance of high-performance frost-resistant concrete according to claim 2, characterized in that: The bottom of the top cover is connected to a pouring block, and the pouring block has a spiral downward pouring channel inside.

4. The sampling mold for testing the frost resistance of high-performance frost-resistant concrete according to claim 3, characterized in that: The grouting cavity formed by the assembly of the fixing plate and the assembly components is a 100mm cube.

5. The sampling mold for testing the frost resistance of high-performance frost-resistant concrete according to claim 4, characterized in that: A rubber sealing gasket is provided between the mating surfaces of the first protrusion and the first groove, and the thickness of the sealing gasket is 1-2mm.

6. The sampling mold for testing the frost resistance of high-performance frost-resistant concrete according to claim 5, characterized in that: The lower outlet diameter of the irrigation channel is 80-90mm, and the outlet edge is rounded with a radius of 2-3mm.

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