Crack manufacturing device for concrete self-healing test

Abstract

The utility model provides a crack manufacturing device for a concrete self-healing test, which comprises a base and two vertical side plates oppositely arranged on two sides of the base, and U-shaped openings penetrating through the tops of the vertical side plates are arranged on the vertical side plates; convex parts matched with the U-shaped openings are arranged at the two ends of the top plate; the two horizontal cross beams are arranged on the two sides of the vertical side plate, and the two ends of each horizontal cross beam are connected with the side wall of the vertical side plate respectively; and the crack adjusting assemblies are respectively arranged on the two horizontal cross beams. According to the utility model, the convenience of loading and unloading the concrete sample is improved, the change of cracks on concrete can be conveniently observed in real time in the test process, and the conditions of crack width and the widths of the cracks on the surface of the concrete at the U-shaped observation ports on the two sides are kept consistent.

Description

Technical Field

[0001] This utility model belongs to the field of concrete testing equipment, specifically relating to a crack manufacturing device for concrete self-healing testing. Background Technology

[0002] With the acceleration of urbanization, people have increasingly higher requirements for the performance of building materials. Self-healing concrete, as a new type of building material, has received increasing attention and research. Its purpose is to improve the waterproofing performance of buildings, prevent moisture from penetrating into the structure, and slow down or avoid corrosion, cracking, and deterioration of cement structural materials, thereby improving the durability and stability of buildings. However, there has never been a good evaluation method for determining whether concrete possesses self-healing properties.

[0003] The revised draft of GB18445-202X, "Cement-Based Penetrating Crystalline Waterproofing Materials," introduced a test method for the self-healing ability of concrete. This method involves splitting a concrete cube specimen in half, then clamping the two halves together in situ, controlling the gap width to be 0.5 mm. A water-permeable device is installed on the fixed specimen, and the crack surface is continuously exposed to water for a certain period. After a period of wet-dry cycles, the initial and 28-day water flow rates are measured, and the healing rate is calculated. However, in actual testing, the standard drafters found that this method has problems such as damaging the cross-sectional structure after splitting the specimen, making it impossible to fit perfectly together, resulting in significant differences in crack width in different parts, and uncontrollable crack width.

[0004] Therefore, there is an urgent need to develop a crack fabrication device for concrete self-healing experiments that is simple in structure, has controllable crack width, and is easy to observe. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a crack fabrication device for concrete self-healing testing, comprising:

[0006] Base;

[0007] Two vertical side plates are arranged opposite each other on both sides of the base, and each vertical side plate has a U-shaped opening that extends through the top.

[0008] The top plate has protrusions at both ends that mate with the U-shaped opening;

[0009] Two horizontal beams are provided on both sides of the vertical side plate, and the two ends of each horizontal beam are connected to the side wall of the vertical side plate respectively.

[0010] After assembly, the base, two vertical side plates, two horizontal beams, and top plate together form a cavity for accommodating concrete.

[0011] Crack adjustment components are respectively installed on the two horizontal beams, and the crack adjustment components include shims and adjustment bolts;

[0012] The gasket is disposed on the inner wall of the horizontal beam, and the gasket can extend and retract along the cavity;

[0013] The adjusting bolt is rotatably mounted through the horizontal beam, one end of which can abut against the gasket, and the through portion of the horizontal beam is provided with threads that match the adjusting bolt.

[0014] According to a preferred embodiment of the crack manufacturing device for concrete self-healing test of the present invention, the horizontal beam can move up and down relative to the side wall of the vertical side plate.

[0015] According to a preferred embodiment of the crack manufacturing device for concrete self-healing test of the present invention, there are at least 3 crack adjustment components on each horizontal beam, wherein one crack adjustment component is set at the center position of the horizontal beam, and the remaining crack adjustment components are symmetrically arranged along the center position of the horizontal beam.

[0016] According to a preferred embodiment of the crack manufacturing device for concrete self-healing test according to the present invention, the position of each crack adjustment component does not exceed the edge of the concrete.

[0017] According to a preferred embodiment of the concrete self-healing test crack manufacturing device of the present invention, the two ends of each horizontal beam are detachably connected to the side wall of the vertical side plate.

[0018] According to a preferred embodiment of the concrete self-healing test crack manufacturing device of the present invention, the base is an upper arc-shaped structure and the top plate is a lower arc-shaped structure.

[0019] According to a preferred embodiment of the concrete self-healing test crack manufacturing device of the present invention, the base and the two vertical side plates are integrally formed.

[0020] According to a preferred embodiment of the concrete self-healing test crack manufacturing device of the present invention, the base and the two vertical side plates are detachably connected.

[0021] According to a preferred embodiment of the concrete self-healing test crack manufacturing device of the present invention, the top plate is movably disposed on both sides within the U-shaped opening.

[0022] According to a preferred embodiment of the crack manufacturing device for concrete self-healing test of the present invention, the crack adjustment component is replaced by a shim and an adjustment bolt. The adjustment bolt is rotatably disposed through the horizontal beam. The through portion of the horizontal beam is provided with a thread matching the adjustment bolt. The shim is disposed on one side of the inner wall of the horizontal beam and connected to the end of the adjustment bolt.

[0023] Compared with the prior art, this utility model has the following beneficial effects:

[0024] 1. This utility model provides a U-shaped opening through the top on both side plates, which facilitates the installation and removal of the top plate, thereby improving the convenience of loading and unloading concrete samples. On the other hand, the U-shaped opening also forms a favorable observation window, which makes it convenient to observe the changes in cracks on the concrete in real time during the test, thereby avoiding the risk of excessive cracks or specimen breakage due to overload.

[0025] 2. This utility model achieves the desired crack width by using a crack adjustment component on the crossbeam and controlling the force of the shims squeezing the concrete by adjusting the tightness of the bolts. Furthermore, by symmetrically setting the crack adjustment component on the crossbeam, equal pressure can be applied symmetrically on both sides of the concrete, ensuring that the crack width on the concrete surface at the U-shaped observation openings on both sides remains consistent. Attached Figure Description

[0026] Figure 1 This utility model relates to a structural schematic diagram of a crack-generating device for concrete self-healing testing.

[0027] Among them, 1-base, 2-vertical side plate, 3-U-shaped opening, 4-top plate, 5-horizontal beam, 6-concrete test block, 7-shield. Detailed Implementation

[0028] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] See Figure 1 One embodiment of this utility model provides a crack-inducing apparatus for a concrete self-healing test, comprising:

[0030] Base 1;

[0031] Two vertical side plates 2 are arranged opposite each other on both sides of the base 1. Each vertical side plate 2 has a U-shaped opening 3 that extends through the top.

[0032] Top plate 4, with protrusions at both ends that mate with the U-shaped opening 3; two horizontal beams 5, which are located on both sides of the vertical side plate 3, with each horizontal beam 5 connected to the side wall of the vertical side plate 3 at both ends.

[0033] After assembly, the base 1, two vertical side plates 2, two horizontal beams 5, and top plate 4 together form a cavity for accommodating the concrete test block 6.

[0034] Crack adjustment components are respectively installed on the two horizontal beams 5. There are 3 crack adjustment components on each horizontal beam 5, one of which is installed at the center of the horizontal beam 5, and the other two crack adjustment components are symmetrically arranged on both sides of the center. The crack adjustment components include shims 7 and adjusting bolts.

[0035] The gasket 7 is connected to the inner wall of the horizontal beam 5 via a telescopic rod, thereby allowing the gasket 7 to telescopically move into the cavity;

[0036] The adjusting bolt is rotatably mounted through the horizontal beam 5, and one end of the adjusting bolt can abut against the gasket 7. The through portion of the horizontal beam 5 is provided with threads that match the adjusting bolt.

[0037] During operation, the concrete specimen 6 is first placed in the cavity, and its position is adjusted so that the central axis of its side wall coincides with the central axis of the inner wall of the horizontal beam 5. Then, the adjusting bolt is rotated to abut against the shim 7, causing the shim to move towards the side wall of the concrete specimen 6 and apply pressure. Next, the protruding ends of the top plate 4 are placed into the U-shaped opening of the vertical side plate 2, and the top plate 4 is moved downwards to abut against the top of the concrete specimen 6. The self-healing crack-inducing device for concrete testing is placed under a press, and pressure is applied to the top plate 4, which is then transmitted to the concrete specimen 6 to induce cracks.

[0038] The U-shaped openings on both sides allow for easy observation of the crack development on the sides of the concrete specimen 6. When the crack width reaches the predetermined target, the pressure of the press is stabilized or unloaded to complete the crack creation. When the crack widths on the two sides of the concrete specimen 6 are inconsistent, the pressure applied to the concrete specimen 6 by the shim 7 can be controlled by adjusting the tightness of the corresponding adjusting bolts, thereby regulating the crack width on the sides of the concrete specimen 6 and making the crack widths on both sides consistent.

[0039] In another embodiment of this utility model, the horizontal beam can move up and down relative to the side wall of the vertical side plate so as to adjust the position of the shim 7 according to the height of the concrete test block 6.

[0040] In another embodiment of the present invention, the position of each of the crack adjustment components does not exceed the edge of the concrete test block 6, so as to avoid uneven effect on the concrete test block 6.

[0041] In another embodiment of this utility model, the base is an upper arc-shaped structure and the top plate is a lower arc-shaped structure, with the upper arc and the lower arc respectively abutting against the bottom and top of the concrete test block 6.

[0042] In another embodiment of this utility model, the two ends of each horizontal beam 5 are detachably connected to the side wall of the vertical side plate 2, so as to replace the water balance beam 5 with the position of the crack adjustment component according to the size of the concrete.

[0043] In another embodiment of this utility model, the base 1 and the two vertical side plates 2 are integrally formed, thereby improving the overall stability of the device.

[0044] In another embodiment of this utility model, for ease of loading, unloading and transportation, the base 1 and the two vertical side plates 2 are detachably connected.

[0045] To prevent the loss of components of the manufacturing device and to improve the overall stability of the device, another embodiment of this utility model provides a crack manufacturing device for concrete self-healing testing, comprising:

[0046] Base 1;

[0047] Two vertical side plates 2 are arranged opposite each other on both sides of the base 1. Each vertical side plate 2 has a U-shaped opening 3 that extends through the top.

[0048] Top plate 4, with protrusions at both ends that mate with the U-shaped opening 3; two horizontal beams 5, which are located on both sides of the vertical side plate 3, with each horizontal beam 5 connected to the side wall of the vertical side plate 3 at both ends.

[0049] The base 1 and the two vertical side plates 2 are an integral structure. After assembly, the base 1, the two vertical side plates 2, the two horizontal beams 5, and the top plate 4 together form a cavity for accommodating the concrete test block 6.

[0050] Crack adjustment components are respectively installed on the two horizontal beams 5. There are 3 crack adjustment components on each horizontal beam 5, one of which is installed at the center of the horizontal beam 5, and the other two are symmetrically arranged on both sides of the center. The crack adjustment component includes a shim 7 and an adjustment bolt.

[0051] The adjusting bolt is rotatably mounted through the horizontal beam 5, the gasket 7 is located inside the horizontal beam 5 and connected to the end of the adjusting bolt, and the through portion of the horizontal beam 5 is provided with threads that match the adjusting bolt.

[0052] It should be noted that, based on the above embodiments of this utility model, those skilled in the art can fully realize the scope of the independent claims and dependent claims of this utility model, and the implementation process and methods are the same as those in the above embodiments; and the parts of this utility model not described in detail belong to the well-known technology in the art. However, the protection scope of this utility model is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A crack-inducing device for concrete self-healing testing, characterized in that, include: Base; Two vertical side plates are arranged opposite each other on both sides of the base, and each vertical side plate has a U-shaped opening that extends through the top. The top plate has protrusions at both ends that mate with the U-shaped opening; Two horizontal beams are provided on both sides of the vertical side plate, and the two ends of each horizontal beam are connected to the side wall of the vertical side plate respectively. After assembly, the base, two vertical side plates, two horizontal beams, and top plate together form a cavity for accommodating concrete. Crack adjustment components are respectively installed on the two horizontal beams, and the crack adjustment components include shims and adjustment bolts; The gasket is disposed on the inner wall of the horizontal beam, and the gasket can extend and retract along the cavity; The adjusting bolt is rotatably mounted through the horizontal beam, one end of which can abut against the gasket, and the through portion of the horizontal beam is provided with threads that match the adjusting bolt.

2. The crack-inducing device for concrete self-healing testing according to claim 1, characterized in that, The horizontal beam is movably connected to the side wall of the vertical side plate relative to the side wall of the vertical side plate.

3. The crack-inducing device for concrete self-healing testing according to claim 1, characterized in that, Each horizontal beam has at least three crack adjustment components, one of which is located at the center of the horizontal beam, and the remaining crack adjustment components are symmetrically arranged along the center of the horizontal beam.

4. The crack-inducing device for concrete self-healing testing according to claim 3, characterized in that, The position of each of the crack adjustment components does not exceed the edge of the concrete.

5. A crack-inducing device for concrete self-healing testing according to any one of claims 1-4, characterized in that, Both ends of each horizontal beam are detachably connected to the sidewall of the vertical side plate.

6. A crack-inducing device for concrete self-healing testing according to any one of claims 1-4, characterized in that, The base has an upper arc-shaped structure, and the top plate has a lower arc-shaped structure.

7. A crack-inducing device for concrete self-healing testing according to any one of claims 1-4, characterized in that, The base and the two vertical side plates are integrated into one piece.

8. A crack-inducing device for concrete self-healing testing according to any one of claims 1-4, characterized in that, The base and two vertical side plates are detachably connected.

9. A crack-inducing device for concrete self-healing testing according to any one of claims 1-4, characterized in that, The top plate is movably disposed within the U-shaped opening on both sides.

Images