Sprayed concrete large plate test block forming tool

Abstract

The utility model discloses a sprayed concrete large plate test block forming tool, which belongs to the technical field of civil engineering building test detection tools and comprises a test mold and an outer cover. The test mold is of a pool-shaped structure with an opening in one end; the outer cover comprises a cover body a, a cover body b and a cover body c; the cover body a wraps the periphery of the test mold; the cover body b is mounted on the cover body a; the cover body c is mounted on the cover body b; the cover body a, the cover body b and the cover body c form a stepped tower-shaped structure; the inner spaces of the cover body a, the cover body b and the cover body c are communicated; a feeding hole is formed in the cover body c and is opposite to the opening end of the test mold; a plurality of exhaust holes are formed in the cover body a and the cover body b; and the exhaust holes in the cover body a and the exhaust holes in the cover body b are not coaxial. According to the utility model, sprayed concrete can be prevented from popping out to the external environment, concrete mixtures can be effectively and completely utilized, waste is reduced, the field area is reduced, and environmental pollution and injury to operators are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering building test and detection tools, and in particular relates to a sprayed concrete large-slab test block forming tool. Background Art

[0002] Before concrete is put into use, it needs to be tested for laboratory adaptation (i.e., it needs to be verified by mix design test). During the test, the concrete to be tested is made into a large plate test block, and the performance of the large plate test block is measured to determine whether the concrete meets the requirements. At present, the large plate test block is made by uniformly spraying concrete into the large plate spray test mold. Since the large plate spray test mold is not covered (it is an open structure), the spray pressure during the spraying process (the pressure inside the concrete when it is sprayed out at the nozzle) sprays part of the concrete sprayed to the bottom of the mold and will rebound. Qualified and high-quality raw materials must be used for the test, which will cause material waste. Since there are a lot of cement and chemical admixtures in the concrete, the popped-out concrete will affect the health of the operators, so the mix ratio test can only be done on an open temporary engineering site. Since the rebounded concrete will solidify quickly and cause pollution to the environment, it is necessary to manually perform secondary cleaning to restore the original appearance of the site. Therefore, it is time-consuming, labor-intensive, and material-consuming to make large plate test blocks using the existing large plate spray test mold. At the same time, it is difficult to meet the temperature (20±5°C) and humidity (>50%) requirements required for adaptation testing in an open environment, which affects the test structure results. Utility Model Content

[0003] In view of this, the utility model provides a shotcrete large slab test block forming tool, which can prevent the shotcrete from being ejected into the external environment, can effectively and fully utilize the concrete mixture, reduce waste, reduce site area, and prevent environmental pollution and harm to operators.

[0004] The utility model is realized by the following technical solutions:

[0005] A shotcrete large slab test block forming tool, comprising: a test mold and an outer cover;

[0006] The test mold is a pool-shaped structure with one end open;

[0007] The outer cover comprises: a cover body a, a cover body b and a cover body c;

[0008] The cover body a is wrapped around the periphery of the test mold; the cover body b is installed on the cover body a; the cover body c is installed on the cover body b; the cover bodies a, b and c form a stepped tower structure, the cover body a has the largest coverage area; the cover body b has a smaller coverage area than the cover body a, and the cover body c has the smallest coverage area; the internal spaces of the cover bodies a, b and c are connected;

[0009] The cover body c is provided with a feed port, which is opposite to the opening end of the test mold;

[0010] The cover body a and the cover body b are both provided with a plurality of exhaust holes; the exhaust holes on the cover body a and the exhaust holes on the cover body b are not coaxial.

[0011] Furthermore, the cover body a is a hexahedral structure with one end open; a blocking cover is installed on the open end of the cover body a to close the open end;

[0012] A rectangular through hole a is processed at the center of a surface of the cover body a that is connected to the open end, and the surface is referred to as surface a; and the rectangular through hole a is opposite to the open end of the test mold;

[0013] The exhaust holes arranged on the cover body a are exhaust holes a; a plurality of the exhaust holes a are located on the surface a of the cover body a; and a plurality of the exhaust holes a are arranged along the circumference of the rectangular through hole a.

[0014] Further, the cover body b is a hexahedral structure with one end open; the open end of the cover body b is fixedly connected to the outer periphery of the rectangular through hole a of the cover body a; the opening size of the open end of the cover body b corresponds to the size of the rectangular through hole a; the surface opposite to the open end of the cover body b is surface b; a rectangular through hole b is processed at the center of the surface b; and the rectangular through hole b is opposite to the open end of the test mold;

[0015] The exhaust holes arranged on the cover body b are called exhaust holes b; a plurality of the exhaust holes b are arranged on four surfaces except the opening end and surface b of the cover body b.

[0016] Further, the cover body c is a hexahedral structure with one end open; the open end of the cover body c is fixedly connected to the outer periphery of the rectangular through hole b of the cover body b, and the size of the open end of the cover body c corresponds to the size of the rectangular through hole b; let the surface opposite to the open end of the cover body c11 be surface c;

[0017] The feed port is arranged at the center of surface c.

[0018] Furthermore, the diameter of the exhaust hole is 1 mm to 3 mm.

[0019] Furthermore, the outer cover also includes: a plurality of L-shaped baffles a;

[0020] A plurality of L-shaped baffles a are installed on the inner wall surface of the cover body a; a plurality of L-shaped baffles a correspond one to one with a plurality of exhaust holes a; each L-shaped baffle a is integrally formed by a horizontal plate and a vertical plate; the vertical plate of the L-shaped baffle a is vertically fixed to the surface a and faces away from the inflowing concrete; the horizontal plate of the L-shaped baffle a is parallel to the surface a and is arranged opposite to the corresponding exhaust hole a.

[0021] Furthermore, the outer cover further comprises: a plurality of L-shaped baffles b;

[0022] A plurality of L-shaped baffles b are installed on the inner wall surface of the cover body b, corresponding to a plurality of exhaust holes b one by one; each of the L-shaped baffles b is integrally formed by a horizontal plate and a vertical plate; the horizontal plate of the L-shaped baffle b is vertically fixed to the surface processed with the exhaust holes b, and is located between the opening end of the cover body b and the exhaust holes b corresponding thereto; the vertical plate of the L-shaped baffle b is parallel to the surface processed with the exhaust holes b, and is arranged opposite to the exhaust holes b corresponding thereto; and the vertical plate of the L-shaped baffle b faces away from the inflowing concrete.

[0023] Further, the outer cover also includes: a rotating hose;

[0024] The rotating hose is installed on the feed inlet.

[0025] Furthermore, the outer cover further includes: one or more hanging rings;

[0026] The hanging ring is installed on the open end of the cover body a.

[0027] Beneficial effects:

[0028] (1) The utility model provides a tool for forming a large-plate test block of sprayed concrete, comprising a test mold and an outer cover; the outer cover prevents concrete from bouncing out into the external environment, which can save time, effort and materials, and can also ensure the health of operators; when spraying concrete, the concrete that bounces onto the inner wall of the outer cover can quickly rebound into the test mold, and the rebounded concrete (i.e., the rebound material of the concrete) does not affect the strength of the manufactured large-plate test block, thereby ensuring the performance of the large-plate test block; the provision of the exhaust hole can prevent the pressure inside the outer cover from being too high during spraying concrete, thereby affecting the injection of concrete; the exhaust hole located on the cover body a and the exhaust hole located on the cover body b are not coaxial, thereby preventing the pressure inside the outer cover from being concentrated locally, thereby causing damage to the outer cover; the outer cover is a three-layer structure, which can meet the spraying distance of concrete; the forming tool can realize the large-plate test block being manufactured in the laboratory, which can ensure the temperature and humidity conditions required for adaptation and detection, thereby ensuring the accuracy of the test results of the large-plate test block.

[0029] (2) The utility model provides a shotcrete large slab test block forming tool, the diameter of the exhaust hole is 1mm to 3mm, which can effectively prevent concrete particles from passing through the exhaust hole, and can further reduce concrete waste.

[0030] (3) The utility model provides a shotcrete large slab test block forming tool, wherein the vertical plate of the L-shaped baffle a is vertically fixed to the surface a and faces away from the inflowing concrete, thereby effectively shielding the concrete particles during feeding; the horizontal plate of the L-shaped baffle a is parallel to the surface a and arranged opposite to the corresponding exhaust hole a, thereby effectively shielding the concrete particles ejected from the test slab.

[0031] (4) The utility model provides a shotcrete large slab test block forming tool, wherein the horizontal plate of the L-shaped baffle b is vertically fixed to the surface processed with the exhaust hole b, and is located between the open end of the cover body b and the exhaust hole b corresponding thereto, and can effectively block the concrete particles ejected from the test plate; the vertical plate of the L-shaped baffle b is parallel to the surface processed with the exhaust hole b, and is arranged opposite to the exhaust hole b corresponding thereto, and the vertical plate of the L-shaped baffle b is facing away from the inflowing concrete, and can effectively block the concrete particles during feeding.

[0032] (5) The utility model provides a large-plate test block forming tool for shotcrete, wherein a rotating hose is installed on a feed port, and concrete can be evenly sprayed into the test mold through the rotating hose, which is beneficial to ensuring the structural strength of the large-plate test block produced by the forming tool.

[0033] (6) The utility model provides a shotcrete large slab test block forming tool, and the outer cover also includes one or more hanging rings, through which the forming tool can be suspended in the vertical direction, which can meet the production requirements of large slab test blocks on the side wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the utility model;

[0035] Figure 2 The bar graph is the compressive strength of the prepared large plate specimens under different pressures;

[0036] Among them, 1-test mold, 2-outer cover, 3-cover body a, 4-exhaust hole a, 5-blocking cover, 6-L-type baffle a, 7-hanging ring, 8-cover body b, 9-exhaust hole b, 10-L-type baffle b, 11-cover body c, 12-feed port. DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0038] This embodiment provides a shotcrete large slab test block forming tool, such as Figure 1 As shown, it includes: a test mold 1 and an outer cover 2;

[0039] The test mold 1 is a pool-shaped structure with one end open;

[0040] The outer cover 2 is mounted on the test mold 1; the outer cover 2 includes: a cover body a3, a cover body b8, a cover body c11, a baffle 5, a rotating hose, a feed port 12, a plurality of exhaust holes a4, a plurality of exhaust holes b9, a plurality of L-shaped baffles a6, a plurality of L-shaped baffles b10 and more than one hanging ring 7;

[0041] The cover body a3 is wrapped around the periphery of the test mold 1; the cover body b8 is installed on the cover body a3; the cover body c11 is installed on the cover body b8; the cover bodies a3, b8 and c11 form a stepped tower structure, and the cover body a3 has the largest coverage area; the internal spaces of the cover bodies a3, b8 and c11 are connected;

[0042] The cover body a3 is a hexahedral structure with one end open; a rectangular through hole a is processed in the center of a surface of the cover body a3 connected to the open end, and the surface is referred to as surface a; in this embodiment, the size of the cover body a3 is 500mm×400mm×250mm

[0043] The test mold 1 is placed into the cover body a through the open end of the cover body a3; the open end of the test mold 1 is opposite to the rectangular through hole a;

[0044] A plurality of the exhaust holes a4 are provided on the surface a of the cover body a3; the plurality of exhaust holes a4 are arranged along the circumference of the rectangular through hole a; in this embodiment, the diameter of the exhaust holes a4 ranges from 1 mm to 3 mm;

[0045] The blocking cover 5 is installed on the open end of the cover body a3 to close the open end of the cover body a3;

[0046] More than one hanging ring 7 is installed on the open end of the cover body a3; in this embodiment, the hanging ring 7 is preferably two; the hanging ring 7 can hang the forming tool in the vertical direction to meet the production requirements of making large plate test blocks on the side wall;

[0047] A plurality of L-shaped baffles a6 are installed on the inner wall surface of the cover body a3; a plurality of L-shaped baffles a6 correspond to a plurality of exhaust holes a4 one by one; each L-shaped baffle a6 is formed integrally by a horizontal plate and a vertical plate; the vertical plate of the L-shaped baffle a6 is vertically fixed to the surface a and faces away from the inflowing concrete, so as to shield the concrete particles during feeding; the horizontal plate of the L-shaped baffle a6 is parallel to the surface a and arranged opposite to the corresponding exhaust holes a4, so as to shield the concrete particles ejected from the test plate 1; in this embodiment, the vertical length of the L-shaped baffle a6 is 20 mm and the horizontal length is 25 mm; the L-shaped baffle a6 is used to prevent the concrete particles from being ejected through the exhaust holes;

[0048] The cover body b8 is a hexahedral structure with one end open; the open end of the cover body b8 is fixedly connected to the outer periphery of the rectangular through hole a of the cover body a3, and the size of the open end of the cover body b8 corresponds to the size of the rectangular through hole a; the surface opposite to the open end of the cover body b8 is surface b; a rectangular through hole b is processed at the center of the surface b; the rectangular through hole b is opposite to the open end of the test mold 1; in this embodiment, the size of the cover body b8 is 400mm×350mm×270mm;

[0049] The exhaust holes b9 are arranged on four surfaces other than the opening end of the cover body b8 and the surface b (i.e., the axial direction of the exhaust holes b9 is not parallel to the axial direction of the exhaust holes a4); in this embodiment, the diameter of the exhaust holes b9 ranges from 1 mm to 3 mm.

[0050] A plurality of L-shaped baffles b10 are installed on the inner wall surface of the cover body b8, corresponding to a plurality of exhaust holes b9 one by one; each of the L-shaped baffles b10 is integrally formed by a horizontal plate and a vertical plate; the horizontal plate of the L-shaped baffle b10 is vertically fixed to the surface processed with the exhaust holes b9, and is located between the open end of the cover body b8 and the exhaust holes b9 corresponding thereto, and is used to block the concrete particles ejected from the test plate 1; the vertical plate of the L-shaped baffle b10 is parallel to the surface processed with the exhaust holes b9, and is arranged opposite to the exhaust holes b9 corresponding thereto; and the vertical plate of the L-shaped baffle b10 is facing away from the inflowing concrete, and is used to block the concrete particles during feeding; in this embodiment, the vertical length of the L-shaped baffle b10 is 20 mm, and the horizontal length is 25 mm; the L-shaped baffle a6 is used to block the concrete particles from being ejected through the exhaust holes;

[0051] The cover body c11 is a hexahedral structure with one end open; the open end of the cover body c11 is fixedly connected to the outer periphery of the rectangular through hole b of the cover body b8, and the size of the open end of the cover body c11 corresponds to the size of the rectangular through hole b; the surface opposite to the open end of the cover body c11 is surface c; in this embodiment, the size of the cover body c11 is 300mm×200mm×100mm;

[0052] The feed port 12 is arranged at the center of the surface c, and the feed port is opposite to the opening end of the test mold 1;

[0053] The rotating hose is coaxially installed in the feed port 12; since the rotating hose can realize rotation, concrete can be sprayed uniformly in the test mold 1 of the forming tool.

[0054] Working principle:

[0055] The forming tool in this embodiment is used to make a large concrete slab test block; concrete is sprayed into the test mold 1 of the forming tool by a wet spraying machine;

[0056] The forming tool in this embodiment is provided with an outer cover 2 on the basis of the existing test mold, so as to prevent the time-consuming, labor-consuming and material-consuming problems caused by the concrete particles being ejected outward; the ejected concrete can be ejected onto the inner wall surface of the outer cover 2 and then be ejected back into the test mold 1, so as to avoid the waste of concrete;

[0057] The outer cover 2 is a three-layer structure, which can meet the spraying distance of concrete;

[0058] When spraying concrete into the test mold 1 in the outer cover 2, the pressure inside the outer cover 2 will increase, and too high a pressure will increase the difficulty of spraying concrete; in this regard, an exhaust hole a4 and an exhaust hole b9 are provided in the embodiment; the gas inside the outer cover 2 can be discharged through the exhaust hole a4 and the exhaust hole b9, which can prevent the pressure inside the outer cover 2 from being too high; when discharging the gas, it is necessary to prevent the concrete particles from being discharged through the exhaust hole; in this regard, the diameter range of the exhaust hole of the outer cover 2 is set at 1mm to 3mm, which can effectively block the discharge of concrete particles with a diameter greater than 3mm (the maximum diameter is 5mm); at the same time, an L-shaped baffle is provided on the inner wall surface of the outer cover 2; the L-shaped baffle can cover the exhaust hole, which can not affect the discharge of gas in the outer cover 2, and further prevent the concrete particles from passing through, thereby avoiding the harm of concrete to the environment or human body and reducing the waste of concrete;

[0059] On the outer cover 2, the exhaust hole a4 located on the cover body a3 is axially inconsistent with the exhaust hole b9 located on the cover body b8, which can prevent the gas pressure from being concentrated on a part of the outer cover 2 and causing damage to the outer cover 2;

[0060] The outer cover 2 is equipped with a rotating hose, and the concrete can be sprayed evenly through the rotation of the rotating hose to ensure the quality of the large plate test block;

[0061] By using the molding tool, large plate test blocks can be made in the laboratory, which can ensure the environmental temperature and humidity requirements when making large plate test blocks, reduce the required site area, protect the environment, and ensure the health of operators;

[0062] Regarding the influence of the rebound material of the concrete rebounding into the test mold 1 on the strength of the large slab test block, a comparative test was conducted to test the influence of the rebound material on the strength of the concrete during the forming process of the large slab test block;

[0063] The test method is as follows:

[0064] (1) Install EVA waterproof sheet at the nozzle of wet spraying machine;

[0065] (2) Use EVA waterproof sheet to cover the open end of the existing test mold;

[0066] (3) Shotcrete spraying to make large slab test blocks;

[0067] (4) Testing the strength of large plate test pieces (marked in the table as: large plate test pieces formed using the inventive tool) and comparing them with the strength of large plate test pieces made using the existing method (marked in the table as: large plate test pieces formed under conventional conditions);

[0068] The strength of the large plate specimens prepared in the two cases is as follows Figure 2 As shown (a total of 9 groups of comparisons were conducted; the ordinate is compressive strength, in MPa);

[0069] The simulation test verified that the effect of the device on the strength of shotcrete under standard curing conditions is within the fluctuation range of the mix design standard deviation, that is, the rebound material will not affect the strength of the large plate test block.

[0070] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shotcrete slab test block forming tool, characterized in that: include: A test mold (1) and an outer cover (2); The test mold (1) is a pool-shaped structure with one end open; The outer cover (2) comprises: a cover body a (3), a cover body b (8) and a cover body c (11); The cover body a (3) is wrapped around the periphery of the test mold (1); the cover body b (8) is mounted on the cover body a (3); the cover body c (11) is mounted on the cover body b (8); the cover bodies a (3), b (8) and c (11) form a stepped tower structure, the cover body a (3) has the largest coverage area; the cover body b (8) has a smaller coverage area than the cover body a (3), and the cover body c (11) has the smallest coverage area; the internal spaces of the cover bodies a (3), b (8) and c (11) are connected; The cover body c (11) is provided with a feed port (12), and the feed port (12) is opposite to the opening end of the test mold (1); The cover body a (3) and the cover body b (8) are both provided with a plurality of exhaust holes; the exhaust holes on the cover body a (3) and the exhaust holes on the cover body b (8) are not coaxial.

2. A shotcrete slab test block forming tool as claimed in claim 1, characterized in that: The cover body a (3) is a hexahedral structure with one end open; a blocking cover (5) is installed on the open end of the cover body a (3) to close the open end; A rectangular through hole a is processed at the center of a surface of the cover body a (3) connected to the open end, and the surface is referred to as surface a; and the rectangular through hole a is opposite to the open end of the test mold (1); The exhaust holes arranged on the cover body a (3) are exhaust holes a (4); a plurality of the exhaust holes a (4) are located on the surface a of the cover body a (3); and a plurality of the exhaust holes a (4) are arranged along the circumference of the rectangular through hole a.

3. A shotcrete slab test block forming tool as claimed in claim 2, characterized in that: The cover body b (8) is a hexahedral structure with one end open; the open end of the cover body b (8) is fixedly connected to the outer periphery of the rectangular through hole a of the cover body a (3); the size of the open end of the cover body b (8) corresponds to the size of the rectangular through hole a; the surface opposite to the open end of the cover body b (8) is surface b; a rectangular through hole b is processed at the center of the surface b; and the rectangular through hole b is opposite to the open end of the test mold (1); The exhaust holes arranged on the cover body b (8) are called exhaust holes b (9); a plurality of the exhaust holes b (9) are arranged on four surfaces other than the opening end and surface b of the cover body b (8).

4. A shotcrete slab test block forming tool as claimed in claim 3, characterized in that: The cover body c (11) is a hexahedral structure with one end open; the open end of the cover body c (11) is fixedly connected to the outer periphery of the rectangular through hole b of the cover body b (8), and the size of the open end of the cover body c (11) corresponds to the size of the rectangular through hole b; let the surface opposite to the open end of the cover body c11 be surface c; The feed port (12) is arranged at the center of surface c.

5. A shotcrete slab test block forming tool as claimed in any one of claims 1 to 4, characterized in that: The diameter of the exhaust hole is 1 mm to 3 mm.

6. A shotcrete slab test block forming tool as claimed in claim 2, characterized in that: The outer cover (2) further comprises: a plurality of L-shaped baffles a (6); A plurality of L-shaped baffles a (6) are installed on the inner wall surface of the cover body a (3); a plurality of L-shaped baffles a (6) correspond to a plurality of exhaust holes a (4) one by one; each L-shaped baffle a (6) is integrally formed by a horizontal plate and a vertical plate; the vertical plate of the L-shaped baffle a (6) is vertically fixed to the surface a and faces away from the inflowing concrete; the horizontal plate of the L-shaped baffle a (6) is parallel to the surface a and is arranged opposite to the exhaust hole a (4) corresponding to it.

7. A shotcrete slab test block forming tool as claimed in claim 3, characterized in that: The outer cover (2) further comprises: a plurality of L-shaped baffles b (10); A plurality of L-shaped baffles b (10) are installed on the inner wall surface of the cover body b (8) and correspond to a plurality of exhaust holes b (9) one by one; each of the L-shaped baffles b (10) is integrally formed by a horizontal plate and a vertical plate; the horizontal plate of the L-shaped baffle b (10) is vertically fixed to the surface processed with the exhaust holes b (9) and is located between the opening end of the cover body b (8) and the exhaust holes b (9) corresponding thereto; the vertical plate of the L-shaped baffle b (10) is parallel to the surface processed with the exhaust holes b (9) and is arranged opposite to the exhaust holes b (9) corresponding thereto; and the vertical plate of the L-shaped baffle b (10) faces away from the inflowing concrete.

8. A shotcrete slab test block forming tool as claimed in claim 1, characterized in that: The outer cover (2) further comprises: a rotating hose; The rotating hose is installed on the feed port (12).

9. A shotcrete slab test block forming tool as claimed in claim 2, characterized in that: The outer cover (2) further comprises: one or more hanging rings (7); The hanging ring (7) is installed on the open end of the cover body a (3).

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