Concrete self-healing rate testing device

Abstract

The utility model provides a concrete self-healing rate testing device which comprises an elastic placing pipe and a supporting box, the supporting box is connected with a cover plate, the cover plate is provided with a placing hole corresponding to the elastic placing pipe, the elastic placing pipe is placed in the placing hole and is connected with the supporting box through a positioning mechanism, and the elastic placing pipe is connected with the supporting box through the positioning mechanism. A hoop used for positioning the concrete block is connected to the outer wall of the elastic containing pipe, and the inner wall of the elastic containing pipe and the outer wall of the concrete block are hooped and sealed through the hoop so that the purpose of positioning and supporting the concrete block can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to test device, in particular to a kind of concrete self-healing rate test device. BACKGROUND

[0002] Concrete is now widely used building material, but in the use process under the action of stress or other factors will appear damage and produce microcrack.

[0003] At present, the Chinese patent with the application publication number CN108793886A discloses a kind of self-healing concrete, and the weight parts composition of the raw material of this concrete is: Portland cement 100-120 parts, water 50-60 parts, dispersing agent 25-35 parts, aggregate 50-70 parts, microbial compound 20-30 parts, modified fiber compound 20-30 parts, phenolic antioxidant 3-5 parts, ethylene bis stearyl amide 1-3 parts, modified saturated carbon nine petroleum resin 8-12 parts.

[0004] By specific proportion and preparation method, the anti-cracking activity is increased to a certain extent, and the self-repairing ability of concrete is also improved.

[0005] At present, the Chinese patent with the authorization announcement number CN214408600U discloses concrete permeability and / or self-healing performance testing device, and the operation steps are disclosed in its embodiment 4, (1), the bottom plate mold is placed horizontally on the ground, and the frame mold is placed above the bottom plate mold to jointly enclose to form pouring cavity for pouring concrete sample; (2), the stirred concrete sample is added to the pouring cavity, and is smoothed; (3), the lower end of water distribution cylinder is vertically inserted into the concrete sample in the pouring cavity by 15mm; the stainless steel sheet with width of 10mm and thickness of 0.3mm is inserted into the concrete sample surrounded by the water distribution cylinder; after the concrete sample is cured for 8h and final setting, the stainless steel sheet is pulled out to obtain a 0.3mm crack; (4), after the concrete sample is cured for 24h and demoulding, a certain height of water is gradually added into the water distribution cylinder, the water height is 10mm each time, after each time of water adding, it is observed whether the lower side of concrete sample leaks water after 1min of standing, and the water height when concrete begins to leak water is recorded, that is, the initial water seepage height; (5), remove the water in the water distribution cylinder in step (4), and the water distribution cylinder is placed in curing chamber (temperature 20±2 ℃, relative humidity >95%) for standard curing for 24h, then taken out, and again according to the method of step (4), a certain height of water is gradually added into the water distribution cylinder, and the water height when the lower side of the concrete sample begins to leak water is recorded, that is, the secondary water seepage height; (6), the ratio of secondary water seepage height and initial water seepage height is taken as self-healing degree to evaluate the self-healing ability of concrete.

[0006] The concrete impermeability and / or self-healing performance testing device discloses an operation method but does not disclose a testing device, and therefore a testing device is urgently needed for supporting a concrete block so as to determine a self-healing rate. Utility model content

[0007] Therefore, the utility model aims at providing a concrete self-healing rate testing device for supporting a concrete block so as to determine a self-healing rate.

[0008] In order to solve the above technical problems, the utility model discloses a concrete self-healing rate testing device, which comprises an elastic placing pipe and a supporting box.

[0009] The concrete block is placed in the elastic placing pipe, the clamp is tightened, the clamp exerts force on the elastic placing pipe, the elastic placing pipe exerts pressure on the concrete block, the concrete block is clamped and sealed between the elastic placing pipe and the concrete block, the elastic placing pipe is placed in the placing hole, the supporting pipe is positioned through the positioning mechanism, the repairing liquid is poured into the elastic placing pipe, the repairing liquid repairs the concrete block, part of the repairing liquid can fall into the supporting box through the cracks on the concrete block so as to be collected, the time is counted from the first drop of the repairing liquid leaking out of the cracks of the concrete block to the last drop of the repairing liquid leaking out of the cracks of the concrete block, and the time difference obtained can calculate the self-healing rate.

[0010] As a preferred scheme of the utility model, the outer wall of the elastic placing pipe is provided with a positioning ring groove, and the clamp is embedded in the positioning ring groove.

[0011] The connection between the clamp and the elastic placing pipe can be more closely and stably connected, and the elastic placing pipe can be more easily deformed to position the concrete block.

[0012] As a preferred scheme of the utility model, the positioning mechanism comprises a locking rod, a first clamping plate and a second clamping plate, the locking rod is rotatably connected to the outer wall of the supporting box, the locking rod is rotated and moves the first clamping plate and the second clamping plate in the opposite direction through the conduction structure, the first clamping plate and the second clamping plate clamp the outer wall of the elastic placing pipe or move the first clamping plate and the second clamping plate away from the elastic placing pipe.

[0013] The elastic placing pipe is placed in the supporting box from the placing hole, the locking rod is rotated forward, the first clamping plate and the second clamping plate are moved to the direction of approaching each other through the transmission structure, so that the first clamping plate and the second clamping plate clamp the outer wall of the elastic placing pipe together, the elastic placing pipe is positioned through the friction force, the repair liquid leaked from the concrete block can enter the supporting box to collect the repair liquid, and the elastic placing pipe can be taken out from the placing hole by rotating the locking rod reversely.

[0014] As a preferred scheme of the utility model, the transmission structure comprises a sliding rod, a driving rod, a first screw sleeve and a second screw sleeve, the sliding rod is fixed on the inner wall of the supporting box at both ends, one end of the driving rod is connected with the locking rod, the other end is rotationally connected to the inner wall of the supporting box, the driving rod and the sliding rod are coaxially arranged, a first threaded section and a second threaded section are formed in the driving rod, the directions of the first threaded section and the second threaded section are opposite, the first screw sleeve is connected with the first threaded section and connected with the first clamping plate, the second screw sleeve is connected with the second threaded section and connected with the second clamping plate, and the first clamping plate and the second clamping plate are slidably connected to the sliding rod.

[0015] The first threaded section and the second threaded section are rotated, the first screw sleeve and the second screw sleeve are moved to the direction of approaching the elastic placing pipe through the transmission of the threads, so that the first clamping plate and the second clamping plate clamp the outer wall of the elastic placing pipe at the same time, and the elastic placing pipe can be taken out from the placing hole by rotating the locking rod reversely.

[0016] As a preferred scheme of the utility model, the first clamping plate and the second clamping plate are provided with clamping arc surfaces on the sides facing the elastic placing pipe.

[0017] The clamping arc surfaces can increase the contact area of the first clamping plate and the second clamping plate on the elastic placing pipe and improve the friction force.

[0018] As a preferred scheme of the utility model, the inner wall of the clamping arc surface is fixedly connected with a friction pad, and an anti-skid groove is formed in the surface of the friction pad.

[0019] The above technical scheme is realized, the friction force of the first clamping plate and the second clamping plate on the elastic placing pipe is further improved, and the elastic placing pipe is stably placed.

[0020] As a preferred scheme of the utility model, an observation window is formed in the side wall of the supporting box, a transparent plate is fixedly connected to the observation window, and the transparent plate corresponds to the lower end of the elastic placing pipe.

[0021] The above technical solution is realized, and the amount of the repair liquid leaking from the concrete block can be viewed at any time through the transparent plate. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an external structure schematic view for the embodiment;

[0023] Figure 2 It is a connection structure schematic view for embodying the elastic placement tube and the support box;

[0024] Figure 3 It is an enlarged view of A of the embodiment; Figure 2

[0025] Figure 4 It is a cross-sectional schematic view for embodying the friction pad;

[0026] Figure 5 It is a structure schematic view for embodying the elastic placement tube.

[0027] Reference signs: 1, elastic placement tube; 11, clamp; 12, positioning ring groove; 2, support box; 21, cover plate; 22, placement hole; 3, positioning mechanism; 31, locking rod; 32, first clamping plate; 33, second clamping plate; 4, transmission structure; 41, sliding rod; 42, driving rod; 43, first screw sleeve; 44, second screw sleeve; 51, first threaded section; 52, second threaded section; 61, clamping arc surface; 62, friction pad; 63, anti-skid groove; 7, observation window; 71, transparent plate. DETAILED DESCRIPTION

[0028] The specific embodiments of the utility model are further described in detail below in combination with the drawings, so that the technical solution of the utility model is easier to understand and master.

[0029] A concrete self-healing rate testing device, comprising an elastic placement tube 1 and a support box 2. The elastic placement tube 1 is made of PE, and a clamp 11 for positioning the concrete block is connected to the outer wall of the elastic placement tube 1. The concrete block is cylindrical, and the elastic placement tube 1 is a cylindrical tube. The clamp 11 has two, and is used for clamping the upper end and the lower end of the concrete block respectively. The inner wall of the elastic placement tube 1 and the outer wall of the concrete block are clamped and sealed by the clamp 11. The two clamps 11 realize double sealing. The positioning ring groove 12 is formed in the outer wall of the elastic placement tube 1, and the two clamps 11 are embedded in the two positioning ring grooves 12 respectively.

[0030] The repair liquid is injected into the elastic placement tube 1. Since the two clamps 11 realize double sealing between the concrete block and the elastic placement tube 1, the repair liquid can only pass through the cracks on the concrete block under the action of gravity, and the repair liquid repairs the concrete block. The repair liquid is mainly different mineral admixtures; the self-healing rate of the repair liquid on the concrete block is determined.​

[0031] A cover plate 21 is fixedly connected to the support box 2, and a placement hole 22 corresponding to the elastic placement tube 1 is formed in the middle of the cover plate 21. The placement hole 22 is circular. The elastic placement tube 1 is placed in the placement hole 22 and connected to the support box 2 through the positioning mechanism 3,

[0032] The positioning mechanism 3 comprises a locking rod 31, a first clamping plate 32 and a second clamping plate 33. The locking rod 31 is rotationally connected to the outer wall of the support box 2. The locking rod 31 is rotated and moves the first clamping plate 32 and the second clamping plate 33 in the direction of approaching each other through the transmission structure 4. So that the first clamping plate 32 and the second clamping plate 33 clamp the outer wall of the elastic placement tube 1 or move the first clamping plate 32 and the second clamping plate 33 in the direction away from the elastic placement tube 1.

[0033] The transmission structure 4 comprises a sliding rod 41, a driving rod 42, a first screw sleeve 43 and a second screw sleeve 44. The two ends of the sliding rod 41 are fixed to the inner wall of the support box 2. One end of the driving rod 42 is connected to the locking rod 31, and the other end is rotationally connected to the inner wall of the support box 2. The driving rod 42 is coaxially arranged with the locking rod 31. The sliding rod 41 is arranged in parallel with the driving rod 42.

[0034] A first threaded section 51 and a second threaded section 52 are formed on the driving rod 42, and the turning directions of the first threaded section 51 and the second threaded section 52 are opposite. The first screw sleeve 43 is threadedly connected with the first threaded section 51, and the outer wall of the first screw sleeve 43 is fixedly connected with the first clamping plate 32. The second screw sleeve 44 is threadedly connected with the second threaded section 52, and the outer wall of the second screw sleeve 44 is fixedly connected with the second clamping plate 33. The end of the first clamping plate 32 away from the first screw sleeve 43 and the end of the second clamping plate 33 away from the second screw sleeve 44 are both slidingly connected to the sliding rod 41.

[0035] The elastic placement tube 1 is placed in the support box 2 from the placement hole 22, and then the locking rod 31 is rotated forward. Through the transmission effect of the first threaded section 51 and the second threaded section 52, the first clamping plate 32 and the second clamping plate 33 are moved in the direction of approaching each other along the sliding rod 41, so that the first clamping plate 32 and the second clamping plate 33 clamp the elastic placement tube 1 together, and the friction force generated realizes the positioning of the elastic placement tube 1. Similarly, the locking rod 31 is reversely rotated, so that the first clamping plate 32 and the second clamping plate 33 are moved in the direction of moving away from each other, so as to extract the elastic placement tube 1 from the placement hole 22.

[0036] In order to increase the friction force between the first clamping plate 32, the second clamping plate 33 and the elastic placement tube 1, a clamping arc surface 61 is formed on the side of the first clamping plate 32 and the second clamping plate 33 facing the elastic placement tube 1, and the clamping arc surface 61 corresponds to the shape of the elastic placement tube 1. A friction pad 62 made of rubber is fixedly connected to the inner wall of the clamping arc surface 61, and an anti-skid groove 63 is formed on the surface of the friction pad 62.

[0037] An observation window 7 is formed on the side wall of the support box 2, and a transparent plate 71 made of glass is fixedly connected to the observation window 7, and the position of the transparent plate 71 corresponds to the lower end of the elastic placement tube 1.

[0038] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A device for testing the self-healing rate of concrete, characterized in that: The device includes an elastic placement tube (1) and a support box (2). The support box (2) is connected to a cover plate (21). The cover plate (21) has a placement hole (22) corresponding to the elastic placement tube (1). The elastic placement tube (1) is placed in the placement hole (22) and connected to the support box (2) through a positioning mechanism (3). The outer wall of the elastic placement tube (1) is connected to a clamp (11) for positioning concrete blocks. The clamp (11) tightly seals the inner wall of the elastic placement tube (1) to the outer wall of the concrete block.

2. The concrete self-healing rate testing device according to claim 1, characterized in that: The outer wall of the elastic placement tube (1) is provided with a positioning ring groove (12), and the clamp (11) is embedded in the positioning ring groove (12).

3. A concrete self-healing rate testing device according to claim 1 or 2, characterized in that: The positioning mechanism (3) includes a locking rod (31), a first clamping plate (32), and a second clamping plate (33). The locking rod (31) is rotatably connected to the outer wall of the support box (2). The locking rod (31) rotates and, through the transmission structure (4), causes the first clamping plate (32) and the second clamping plate (33) to move in opposite directions, so that the first clamping plate (32) and the second clamping plate (33) clamp the outer wall of the elastic placement tube (1) or move the first clamping plate (32) and the second clamping plate (33) away from the elastic placement tube (1).

4. The concrete self-healing rate testing device according to claim 3, characterized in that: The transmission structure (4) includes a slide rod (41), a drive rod (42), a first threaded sleeve (43), and a second threaded sleeve (44). The two ends of the slide rod (41) are fixed to the inner wall of the support box (2). One end of the drive rod (42) is connected to the locking rod (31), and the other end is rotatably connected to the inner wall of the support box (2). The drive rod (42) and the slide rod (41) are coaxially arranged. The drive rod (42) has a first threaded section (51) and a second threaded section (52). The first threaded section (51) and the second threaded section (52) rotate in opposite directions. The first threaded sleeve (43) is connected to the first threaded section (51) and to the first clamping plate (32). The second threaded sleeve (44) is connected to the second threaded section (52) and to the second clamping plate (33). The first clamping plate (32) and the second clamping plate (33) are slidably connected to the slide rod (41).

5. The concrete self-healing rate testing device according to claim 3, characterized in that: The first clamping plate (32) and the second clamping plate (33) are provided with a clamping arc surface (61) on the side facing the elastic placement tube (1), and the clamping arc surface (61) corresponds to the shape of the elastic placement tube (1).

6. The concrete self-healing rate testing device according to claim 5, characterized in that: A friction pad (62) is fixedly connected to the inner wall of the clamping arc surface (61), and an anti-slip groove (63) is formed on the surface of the friction pad (62).

7. The concrete self-healing rate testing device according to claim 1, characterized in that: An observation window (7) is provided on the side wall of the support box (2), and a transparent plate (71) is fixedly connected to the observation window (7). The transparent plate (71) corresponds to the lower end of the elastic placement tube (1).

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