Sample impermeability test method based on fiber-compensated shrinkage concrete

Abstract

The invention relates to the technical field of fiber-compensated shrinkage concrete, and discloses a fiber-compensated shrinkage concrete-based sample impermeability test method, which comprises the following steps: 1) preparing a round table cylinder-shaped sample, and polishing the outer surface to remove laitance; (2) attaching a paraffin layer to the peripheral side surface of the sample which is provided with a peripheral side surface, a top side surface and a bottom side surface; (3) sleeving the periphery of the sample with a heating sleeve, and heating and melting the paraffin layer to connect into a whole; 4) placing the sample in a test mold of an anti-permeability instrument, arranging a water injection port at the bottom of the test mold to connect with a water injection pipe, and fixing the sample in the test mold; 5, high-pressure water is injected into the water injection pipe and acts on the side face of the bottom through a water injection opening, and the water injection pipe is closed after continuous injection is conducted for set time; 6) withdrawing the sample from the test mold, and separating the sleeve; 7) longitudinally dividing the sample in half, and measuring the water seepage height of the sample through the inner side surface; through the seven steps, the accuracy of the test result of the impermeability performance of the sample is improved.

Description

Technical Field

[0001] This invention patent relates to the technical field of fiber compensated shrinkage concrete. Specifically, it relates to a method for testing the impermeability of specimens based on fiber compensated shrinkage concrete. Background Art

[0002] Fiber compensated shrinkage concrete is a high-performance concrete material that improves the crack resistance and impermeability of concrete by adding an expansive agent and fibers (such as polypropylene fibers).

[0003] In recent years, with the development of concrete technology, fiber compensated shrinkage concrete has been increasingly widely used in construction projects, especially in structures that require high impermeability performance, such as large water tanks in large water plants, bridges, tunnels, etc. Therefore, it plays an extremely important role in the impermeability performance testing of fiber compensated shrinkage concrete.

[0004] In the prior art, traditional impermeability test methods are mainly based on the test standards of ordinary concrete. When these methods are used to test fiber compensated shrinkage concrete, there are deficiencies in the accuracy of impermeability performance testing, mainly reflected in: insufficient surface treatment of specimens, imperfect side sealing, insecure fixation, inaccurate measurement of the internal water seepage height, and complex test procedures. These problems result in poor accuracy and reliability of test results. Summary of the Invention

[0005] The purpose of this invention is to provide a method for testing the impermeability of specimens based on fiber compensated shrinkage concrete, aiming to solve the problem of poor accuracy in testing the impermeability performance of specimens in the prior art.

[0006] The method for testing the impermeability of specimens based on fiber compensated shrinkage concrete of this invention is realized as follows, including the following steps:

[0007] 1), Prepare a frustum-shaped specimen with fiber compensated shrinkage concrete, and polish the outer surface of the specimen to remove the laitance on the outer surface of the specimen.

[0008] 2), The outer circumference of the specimen has an outer circumferential side surface, the top of the specimen has a top side surface, and the bottom of the specimen has a bottom side surface. Attach a paraffin layer to the outer circumferential side surface, and the paraffin layer is arranged in a circumferential direction along the outer circumferential side surface to seal the outer circumferential side surface.

[0009] 3), After heating a metal sleeve to a set temperature, sleeved the sleeve on the outer circumference of the specimen. The paraffin layer is melted by heat and fixedly connected with the sleeve as a whole. The top of the sleeve is exposed at the top side surface, and the bottom of the sleeve is exposed at the bottom side surface.

[0010] 4), Place the specimen in the test mold of the impermeability tester. The bottom of the test mold is provided with a water injection port, and the water injection port is connected to a water injection pipe. The bottom side of the specimen covers the water injection port, and the specimen is fixed in the test mold;

[0011] 5), Inject high-pressure water with a set pressure into the water injection pipe. The high-pressure water acts on the bottom side through the water injection port. After the high-pressure water is continuously injected for a set time, close the water injection pipe;

[0012] 6), Remove the specimen from the test mold and detach the sleeve from the specimen;

[0013] 7), Vertically divide the specimen into two halves to form two semi-specimens. The semi-specimens have an inner side formed after division, and the water seepage height of the specimen is measured through the inner side.

[0014] Further, in step 1), after the specimen is formed and cured to a set time, polish the outer surface of the specimen.

[0015] Further, in step 1), only polish the bottom side and the top side of the specimen.

[0016] Further, in step 2), rosin is mixed in the paraffin layer. The bottom of the paraffin layer is arranged flush with the bottom side, and the top of the paraffin layer is arranged flush with the top side.

[0017] Further, in step 2), mix paraffin and rosin and place them in a tray. Place the tray in a vacuum dryer and heat it to a set temperature. The paraffin and rosin melt and mix to form a molten material; place the specimen horizontally in the tray and roll the specimen until the molten material coats the entire outer peripheral side. After the molten material solidifies, it forms the paraffin layer.

[0018] Further, in step 2), after attaching a thin film layer to the bottom side and the top side respectively, place the specimen horizontally in the tray and roll it until the molten material coats the entire outer peripheral side.

[0019] Further, in step 3), place the sleeve in a vacuum dryer and heat it to a set temperature. Then, place the bottom side of the specimen against a horizontally flat surface, with the top side of the specimen facing up; sleeve the sleeve over the outer periphery of the specimen from top to bottom until the bottom of the sleeve abuts against the horizontal surface and is arranged flush with the bottom side.

[0020] Further, in step 3), after the paraffin layer solidifies and combines with the sleeve as a whole, remove the thin film layers on the bottom side and the top side, and the bottom side and the top side are exposed.

[0021] Further, in step 7), the specimen is placed on a vibrating table. There is a circular groove area arranged circularly on the vibrating table. The outer periphery of the circular groove area has an inner side wall arranged annularly inward; a bottom diameter bar is provided at the bottom of the circular groove area. The end of the bottom diameter bar is butted against the inner side wall, and the bottom diameter bar passes through the center of the circular groove area; swingable side bars are respectively provided on both sides of the circular groove area, and a top diameter bar is provided above the circular groove area. The top diameter bar and the bottom diameter bar are arranged vertically aligned up and down;

[0022] A bottom diameter groove is machined on the bottom side surface of the specimen. The end of the bottom diameter groove penetrates the outer side surface, and the bottom diameter groove passes through the center of the bottom side surface; a top diameter groove is machined on the top side surface of the specimen. The end of the top diameter groove penetrates the outer side surface, and the top diameter groove passes through the center of the top side surface, and the top diameter groove and the bottom diameter groove are vertically aligned up and down;

[0023] Two outer peripheral grooves are machined on the outer side surface. The top of the outer peripheral groove communicates with the end of the top diameter groove, the bottom of the outer peripheral groove communicates with the end of the bottom diameter groove, the outer peripheral groove penetrates the paraffin layer, and the top diameter groove, the bottom diameter groove and the two outer peripheral grooves enclose and communicate to form an annular groove;

[0024] The bottom side surface of the specimen is abutted against the bottom of the circular groove area. There is a gap between the outer side surface and the inner side wall. The bottom diameter bar is embedded in the bottom diameter groove. The two side bars are swung towards the specimen until the side bars are embedded in the outer peripheral grooves. The top diameter bar moves downward until the top diameter bar is embedded in the top diameter groove. Then the vibrating table vibrates longitudinally, and the top diameter bar vibrates and moves downward until the specimen is longitudinally split in half.

[0025] Further, in step 7), the bottom diameter bar includes two deformation sheets arranged facing each other and having elastic deformation. The lower parts of the two deformation sheets are connected together facing each other to form a fixed part; the upper parts of the deformation sheets protrude and bend outward to form bending parts. The bending parts of the two deformation sheets are arranged facing each other and enclose an elastic space; there is a gap between the tops of the two bending parts to form a strip-shaped opening communicating with the elastic space; an elastic body is filled in the elastic space, and the elastic body is connected with the two bending parts as a whole;

[0026] After the bottom diameter bar is embedded in the bottom diameter groove, the tops of the two bending parts abut against the specimen, and the outer sides of the two bending parts abut against the inner side wall of the bottom diameter groove; during the longitudinal vibration of the vibrating table, the two bending parts and the elastic body deform synchronously and apply an outward vibration force to the inner side wall of the bottom diameter groove.

[0027] Compared with the prior art, the specimen impermeability test method based on fiber compensated shrinkage concrete provided by the present invention has the following advantages:

[0028] Firstly, by grinding the outer surface of the specimen to remove the floating slurry, the problem of test error caused by the residual floating slurry on the specimen surface is effectively solved, the flatness and cleanliness of the specimen surface are improved, and a reliable specimen basis is provided for subsequent tests;

[0029] Secondly, the outer peripheral side of the specimen is sealed by using a paraffin layer and a heated metal sleeve to form a reliable sealing structure, effectively preventing the high-pressure water body from seeping out from the side, ensuring that the water body can only seep in from the bottom during the test, thereby improving the reliability of the test results;

[0030] Furthermore, by fixing the specimen in the test mold and using the sealing structure of the paraffin layer and the sleeve to further enhance the stability of the specimen, ensuring that the specimen remains stable under the action of the high-pressure water body, and improving the stability and repeatability of the test;

[0031] Finally, by longitudinally splitting the specimen in half to form two half-specimens and directly measuring the water seepage height through the inner side, the water seepage path is clearly visible, facilitating the accurate measurement of the water seepage height, thereby improving the accuracy of the test results. Brief Description of the Drawings

[0032] Figure 1 is a schematic flow chart of the specimen impermeability test method based on fiber compensated shrinkage concrete provided by the present invention;

[0033] Figure 2 is a schematic structural diagram of each surface of the specimen provided by the present invention;

[0034] Figure 3 is a schematic structural diagram of the paraffin layer and the sleeve provided by the present invention;

[0035] Figure 4 is a schematic structural diagram of the specimen placed in the test mold provided by the present invention;

[0036] Figure 5 is a schematic structural diagram of the circular groove area provided by the present invention;

[0037] Figure 6 is a schematic structural diagram of the annular groove provided by the present invention;

[0038] Figure 7 is a schematic structural diagram of the bottom diameter bar provided by the present invention;

[0039] In the figure: vibrating table 100, circular groove area 101, inner-facing side wall 102, side bar 103, top diameter bar 104, test mold 105, water injection port 106, water injection pipe 107;

[0040] Bottom diameter bar 200, deformation piece 201, fixing part 202, bending part 203, strip opening 204, elastomer 205;

[0041] Specimen 300, outer peripheral side surface 301, top side surface 302, bottom side surface 303, paraffin layer 304, sleeve 305, bottom diameter groove 306, top diameter groove 307, outer peripheral groove 308. Detailed implementation mode

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0044] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0045] Refer to Figure 1-7 As shown, it is a preferred embodiment provided by the present invention.

[0046] The anti-seepage test method for specimens of fiber compensated shrinkage concrete includes the following steps:

[0047] 1), Prepare a frustum-shaped specimen 300 with fiber compensated shrinkage concrete, and polish the outer surface of the specimen 300 to remove the floating mortar on the outer surface of the specimen 300;

[0048] 2), The specimen 300 has an outer peripheral side surface 301, a top side surface 302 at the top of the specimen 300, and a bottom side surface 303 at the bottom of the specimen 300. Attach a paraffin layer 304 to the outer peripheral side surface 301. The paraffin layer 304 is arranged circumferentially along the outer peripheral side surface 301 to seal the outer peripheral side surface 301;

[0049] 3) After heating the metal sleeve 305 to the set temperature, the sleeve 305 is sleeved on the outer periphery of the specimen 300. The paraffin layer 304 is heated and melted, and is fixedly connected to the sleeve 305 as a whole. The top of the sleeve 305 is exposed on the top side 302, and the bottom of the sleeve 305 is exposed on the bottom side 303.

[0050] 4) Place the specimen 300 in the test mold 105 of the impermeability tester. The bottom of the test mold 105 is provided with a water injection port 106, and the water injection port 106 is connected with a water injection pipe 107. The bottom side 303 of the specimen 300 covers the water injection port 106, and the specimen 300 is fixed in the test mold 105.

[0051] 5) Inject high-pressure water body with a set pressure through the water injection pipe 107. The high-pressure water body acts on the bottom side 303 through the water injection port 106. After the high-pressure water body is continuously injected for a set time, close the water injection pipe 107.

[0052] 6) Withdraw the specimen 300 from the test mold 105 and detach the sleeve 305 from the specimen 300.

[0053] 7) Longitudinally divide the specimen 300 into two half-specimens. The half-specimens have inner sides formed after division, and the water seepage height of the specimen 300 is measured through the inner sides.

[0054] The above-provided specimen impermeability test method based on fiber compensated shrinkage concrete has the following advantages:

[0055] First, by grinding the outer surface of the specimen 300 to remove the floating mortar, the problem of test error caused by the residual floating mortar on the surface of the specimen 300 is effectively solved, the flatness and cleanliness of the surface of the specimen 300 are improved, and a reliable basis of the specimen 300 is provided for subsequent tests.

[0056] Second, the outer peripheral side 301 of the specimen 300 is sealed by using the paraffin layer 304 and the heated metal sleeve 305 to form a reliable sealing structure, effectively preventing the high-pressure water body from seeping out from the side, ensuring that the water body can only seep in from the bottom during the test process, and thus improving the reliability of the test results.

[0057] Third, by fixing the specimen 300 in the test mold 105 and further enhancing the stability of the specimen 300 by using the sealing structure of the paraffin layer 304 and the sleeve 305, ensuring that the specimen 300 remains stable under the action of the high-pressure water body, and improving the stability and repeatability of the test.

[0058] Finally, by longitudinally dividing the specimen 300 into two half-specimens and directly measuring the water seepage height through the inner sides, the water seepage path is clearly visible, facilitating the accurate measurement of the water seepage height, and thus improving the accuracy of the test results.

[0059] In this embodiment, in step 1), after the specimen 300 is molded and cured to a set time, the outer surface of the specimen 300 is polished.

[0060] In this way, the specimen 300 reaches a certain strength and stability before polishing, avoiding damage or deformation to the specimen 300 caused by premature polishing. By polishing after curing, the laitance and impurities on the surface of the specimen 300 can be more effectively removed, thereby improving the flatness and cleanliness of the surface of the specimen 300 and providing a more reliable basis for the subsequent impermeability performance test of the specimen 300.

[0061] In this embodiment, in step 1), only the bottom side 303 and the top side 302 of the specimen 300 are polished.

[0062] By means of local polishing, the laitance and impurities that may exist at the bottom and top of the specimen 300 can be removed targeted, ensuring the surface quality of these two key parts. The bottom side 303 and the top side 302 are the main parts where the specimen 300 contacts the test equipment during the impermeability test, and their surface quality directly affects the sealing and stability of the test. By only polishing these two parts, the water seepage error caused by surface defects can be effectively reduced, thereby improving the accuracy of the impermeability performance test of the specimen 300.

[0063] In this embodiment, in step 2), the paraffin layer 304 is mixed with rosin. The bottom of the paraffin layer 304 is arranged flush with the bottom side 303, and the top of the paraffin layer 304 is arranged flush with the top side 302.

[0064] By adding rosin to the paraffin layer 304, the adhesion and sealing performance of the paraffin layer 304 can be improved, making it better fit the outer peripheral side 301 of the specimen 300. At the same time, the paraffin layer 304 is arranged flush with the top side 302 and the bottom side 303 of the specimen 300, which can ensure the sealing of the specimen 300 with the impermeability tester during the subsequent test and prevent high-pressure water from seeping out from the side, thereby improving the reliability of the test results.

[0065] In this embodiment, in step 2), the paraffin and rosin are mixed and placed in a tray. The tray is placed in a vacuum dryer and heated to a set temperature. The paraffin and rosin melt and mix to form a molten material. The specimen 300 is placed horizontally in the tray, and the specimen 300 is rolled until the molten material coats the entire outer peripheral side 301. After the molten material solidifies, the paraffin layer 304 is formed.

[0066] By heating and rolling the specimen 300 in a vacuum dryer, paraffin and rosin can be evenly coated on the outer peripheral side 301 of the specimen 300, forming a uniform and firm paraffin layer 304. The uniform paraffin layer 304 can effectively prevent high-pressure water from seeping into the specimen 300 from the side, thereby improving the accuracy of the anti-seepage performance test of the specimen 300.

[0067] In this embodiment, in step 2), after attaching thin film layers to the bottom side 303 and the top side 302 respectively, the specimen 300 is placed horizontally in a tray and rolled until the molten material coats the entire outer peripheral side 301.

[0068] The thin film layers attached to the specimen 300 respectively can play a temporary protection role, preventing the paraffin layer 304 from contaminating or damaging these two key parts during the coating process, and helping to maintain the cleanliness and integrity of the surface of the specimen 300.

[0069] In this embodiment, in step 3), after heating the sleeve 305 in a vacuum dryer to a set temperature, the bottom side 303 of the specimen 300 is abutted against a horizontally flat surface, and the top side 302 of the specimen 300 is arranged upward; the sleeve 305 is sleeved on the outer periphery of the specimen 300 from top to bottom until the bottom of the sleeve 305 abuts against the horizontal surface and is arranged flush with the bottom side 303.

[0070] In this way, it can be ensured that the paraffin layer 304 is heated and melted and firmly bonded to the sleeve 305. At the same time, the bottom of the sleeve 305 is arranged flush with the bottom side 303 of the specimen 300, which can further enhance the stability of the specimen 300, prevent the specimen 300 from shifting or shaking during the anti-seepage test, and thus improve the stability and repeatability of the test.

[0071] In this embodiment, in step 3), when the paraffin layer 304 solidifies and is integrated with the sleeve 305, the thin film layers on the bottom side 303 and the top side 302 are removed, and the bottom side 303 and the top side 302 are exposed.

[0072] After removing the thin film layers, the bottom side 303 and the top side 302 of the specimen 300 are completely exposed, facilitating subsequent test operations, enabling the key parts of the specimen 300 in the anti-seepage test to be in direct contact with the test equipment, and thus improving the accuracy and reliability of the test.

[0073] In this embodiment, in step 7), the specimen 300 is placed on the vibrating table 100. There is a circular groove area 101 arranged in a circular shape on the vibrating table 100. The outer periphery of the circular groove area 101 has an inwardly annularly arranged inner side wall 102; at the bottom of the circular groove area 101, there is a bottom diameter bar 200. The end of the bottom diameter bar 200 is butted against the inner side wall 102, and the bottom diameter bar 200 passes through the center of the circular groove area 101; on both sides of the circular groove area 101, there are respectively arranged swing side bars 103, and above the circular groove area 101, there is a top diameter bar 104. The top diameter bar 104 and the bottom diameter bar 200 are arranged vertically aligned up and down.

[0074] A bottom diameter groove 306 is machined on the bottom side 303 of the specimen 300. The end of the bottom diameter groove 306 penetrates the outer peripheral side 301, and the bottom diameter groove 306 passes through the center of the bottom side 303; a top diameter groove 307 is machined on the top side 302 of the specimen 300. The end of the top diameter groove 307 penetrates the outer peripheral side 301, and the top diameter groove 307 passes through the center of the top side 302, and the top diameter groove 307 and the bottom diameter groove 306 are vertically aligned up and down.

[0075] Two outer peripheral grooves 308 are machined on the outer peripheral side 301. The top of the outer peripheral groove 308 communicates with the end of the top diameter groove 307, the bottom of the outer peripheral groove 308 communicates with the end of the bottom diameter groove 306, the outer peripheral groove 308 penetrates the paraffin layer 304, and the top diameter groove 307, the bottom diameter groove 306, and the two outer peripheral grooves 308 enclose and communicate to form an annular groove.

[0076] The bottom side 303 of the specimen 300 is abutted against the bottom of the circular groove area 101. There is a gap between the outer peripheral side 301 and the inner side wall 102. The bottom diameter bar 200 is embedded in the bottom diameter groove 306. The two side bars 103 are swung towards the specimen 300 until the side bars 103 are embedded in the outer peripheral grooves 308. The top diameter bar 104 moves downward until the top diameter bar 104 is embedded in the top diameter groove 307. Then, the vibrating table 100 vibrates longitudinally, and the top diameter bar 104 vibrates and moves downward until the specimen 300 is longitudinally split in half.

[0077] By providing various grooves on the specimen 300 and utilizing the cooperation between various bars and grooves on the vibrating table 100, precise positioning and fixation of the specimen 300 can be achieved, enabling the specimen 300 to remain stable during vibration and avoiding displacement or deformation of the specimen 300 caused by vibration.

[0078] Meanwhile, through the longitudinal vibration of the vibration table 100 and the downward vibration movement of the top diameter bar 104, it can be ensured that the specimen 300 is longitudinally bisected evenly and precisely, making the water seepage path inside the specimen 300 clearly visible, facilitating the direct measurement of the water seepage height, and solving the problem of inaccurate measurement of the water seepage height caused by uneven splitting of the specimen 300.

[0079] In this embodiment, in step 7), the bottom diameter bar 200 includes two deformable sheets 201 arranged facing each other and having elastic deformation. The lower parts of the two deformable sheets 201 are connected together facing each other to form a fixed part 202; the upper parts of the deformable sheets 201 protrude and bend outwards to form bent parts 203. The bent parts 203 of the two deformable sheets 201 are arranged facing each other and enclose an elastic space; there is a strip-shaped opening 204 formed by arranging the tops of the two bent parts 203 at intervals, which communicates with the elastic space; an elastomer 205 is filled in the elastic space, and the elastomer 205 is connected to the two bent parts 203 as a whole;

[0080] After the bottom diameter bar 200 is embedded in the bottom diameter groove 306, the tops of the two bent parts 203 abut against the specimen 300, and the outer sides of the two bent parts 203 abut against the inner side wall of the bottom diameter groove 306; during the longitudinal vibration of the vibration table 100, the two bent parts 203 and the elastomer 205 deform synchronously and apply an outward vibration force to the inner side wall of the bottom diameter groove 306.

[0081] By adopting the deformable sheet 201 with elastic deformation and the elastomer 205, when the bottom diameter bar 200 is embedded in the bottom diameter groove 306 of the specimen 300, it fits tightly with the specimen 300. During the vibration process, the synchronous deformation of the deformable sheet 201 and the elastomer 205 can keep a stable contact between the bottom diameter bar 200 and the specimen 300, and can apply the vibration force evenly, not only enhancing the stability of the specimen 300 during the vibration process, but also effectively preventing the specimen 300 from loosening or shifting during the vibration process;

[0082] In this way, the specimen 300 can maintain a good fixed state during the vibration process, thereby ensuring that the specimen 300 is evenly split, improving the accuracy of measuring the water seepage height inside the specimen 300, and solving the problem of test result deviation caused by the insecure fixation of the specimen 300.

[0083] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test method for the impermeability of a sample based on fiber-compensated shrinkage concrete, characterized in that: The following steps are involved: 1) Using fiber-compensated shrinkage concrete to prepare a truncated cone-shaped specimen, and grinding the outer surface of the specimen to remove the laitance on the outer surface of the specimen; 2) The periphery of the sample has a peripheral side surface, the top of the sample has a top side surface, and the bottom of the sample has a bottom side surface. A paraffin layer is attached to the peripheral side surface, and the paraffin layer is arranged around the peripheral side surface along the circumference of the peripheral side surface to seal the peripheral side surface; 3) After heating the metal sleeve to a set temperature, the sleeve is placed on the periphery of the sample, the paraffin layer is melted by the heat, and is fixedly connected to the sleeve as a whole, the top side surface is exposed at the top of the sleeve, and the bottom side surface is exposed at the bottom of the sleeve; 4) placing the sample in a test mold of an impermeability tester, wherein a water injection port is provided at the bottom of the test mold, the water injection port is connected to a water injection pipe, the bottom side of the sample is covered with the water injection port, and the sample is fixed in the test mold; 5) The water injection pipe injects high-pressure water of set pressure, and the high-pressure water acts on the bottom side through the water injection port. After the high-pressure water continues to be injected for a set time, the water injection pipe is closed; 6) withdrawing the sample from the test mold and separating the sleeve from the sample; 7) Split the sample in half longitudinally to form two half-sample bodies, each half-sample body having an inner side surface formed after the splitting, and measuring the water seepage height of the sample through the inner side surface.

2. The test method for the impermeability of a sample based on fiber-compensated shrinkage concrete according to claim 1, characterized in that: In the step 1), after the sample is formed, it is cured for a set time and then the outer surface of the sample is polished.

3. The test method for the impermeability of a sample based on fiber-compensated shrinkage concrete according to claim 1, characterized in that: In the step 1), only the bottom side and the top side of the sample are polished.

4. The test method for the impermeability of a sample based on fiber-compensated shrinkage concrete according to any one of claims 1 to 3, characterized in that: In the step 2), pine flavor is mixed in the paraffin layer, the bottom of the paraffin layer is flush with the bottom side, and the top of the paraffin layer is flush with the top side.

5. The test method for the anti-permeability of a sample based on fiber-compensated shrinkage concrete according to claim 4, characterized in that: In the step 2), paraffin wax and rosin flavor are mixed and placed in a tray, and the tray is placed in a vacuum dryer and heated to a set temperature, and the paraffin wax and rosin flavor are melted and mixed to form a melt; the sample is placed in a horizontal position in the tray, and the sample is rolled until the melt coats the entire peripheral side surface, and the melt solidifies to form the paraffin layer.

6. The test method for the anti-permeability of a sample based on fiber-compensated shrinkage concrete according to claim 5, characterized in that: In the step 2), after the thin film layers are attached to the bottom side and the top side, the sample is placed in a horizontal position in the tray and rolled until the molten material coats the entire peripheral side.

7. The test method for the impermeability of a sample based on fiber-compensated shrinkage concrete according to any one of claims 1 to 3, characterized in that: In the step 3), after the sleeve is placed in a vacuum dryer and heated to a set temperature, the bottom side of the sample is abutted against a horizontal plane arranged horizontally and flatly, and the top side of the sample is arranged upward; the sleeve is sleeved on the outer circumference of the sample from top to bottom until the bottom of the sleeve abuts against the horizontal plane and is arranged flush with the bottom side.

8. The test method for the impermeability of a sample based on fiber-compensated shrinkage concrete according to any one of claims 1 to 3, characterized in that: In the step 3), after the paraffin layer solidifies and is integrated with the sleeve, the film layer on the bottom side and the top side is removed, and the bottom side and the top side are exposed.

9. The test method for the impermeability of a sample based on fiber-compensated shrinkage concrete according to any one of claims 1 to 3, characterized in that: In the step 7), the sample is placed on a vibration table, the vibration table has a circular groove area arranged in a circular shape, the outer periphery of the circular groove area has an inwardly arranged inward side wall; the bottom of the circular groove area is provided with a bottom diameter bar, the end of the bottom diameter bar is butted against the inward side wall, and the bottom diameter bar passes through the center of the circular groove area; the two sides of the circular groove area are respectively provided with swinging side bars, the top of the circular groove area is provided with a top diameter bar, and the top diameter bar is vertically aligned with the bottom diameter bar; A bottom diameter groove is formed on the bottom side of the sample, the end of the bottom diameter groove passes through the outer peripheral side, and the bottom diameter groove passes through the center of the bottom side; a top diameter groove is formed on the top side of the sample, the end of the top diameter groove passes through the outer peripheral side, and the top diameter groove passes through the center of the top side, and the top diameter groove is vertically aligned with the bottom diameter groove; Two peripheral grooves are formed on the peripheral side surface, the top of the peripheral groove is connected to the end of the top diameter groove, the bottom of the peripheral groove is connected to the end of the bottom diameter groove, the peripheral groove passes through the paraffin layer, and the top diameter groove, the bottom diameter groove and the two peripheral grooves are connected to form an annular groove; The bottom side of the sample is abutted against the bottom of the circular groove area, with a gap between the outer peripheral side and the inner side wall, and the bottom diameter bar is embedded in the bottom diameter groove. The two side strips are swung toward the sample until the side strips are embedded in the outer peripheral groove, and the top diameter bar moves downward until the top diameter bar is embedded in the top diameter groove. The vibration table vibrates longitudinally, and the top diameter bar vibrates and moves downward until the sample is split in half longitudinally.

10. The test method for the anti-permeability of a sample based on fiber-compensated shrinkage concrete according to claim 9, characterized in that: In step 7), the bottom diameter strip includes two deformation pieces arranged facing each other and having elastic deformation, the lower parts of the two deformation pieces are connected facing each other as a whole to form a fixed part; the upper part of the deformation piece is protruded and bent outward to form a bent part, and the bent parts of the two deformation pieces are arranged facing each other to enclose and form an elastic space; The tops of the two curved parts are arranged at intervals to form a strip-shaped opening connected to the elastic space; the elastic space is filled with an elastic body, and the elastic body is connected to the two curved parts as a whole; When the bottom diameter strip is embedded in the bottom diameter groove, the tops of the two curved parts abut against the sample, and the outer sides of the two curved parts abut against the inner wall of the bottom diameter groove; when the vibration table vibrates longitudinally, the two curved parts and the elastic body deform synchronously and apply an outward vibration force to the inner wall of the bottom diameter groove.

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