Method for testing water channeling resistance of waterproof material under negative pressure and simulation of constant-temperature or temperature-variable working conditions

Abstract

The invention discloses a water channeling resistance test method for a waterproof material under negative pressure and simulation of constant temperature or temperature change working conditions, test equipment adopted by the method comprises a water tank, a test piece and a negative pressure power piece, and the method comprises the following steps: 1) forming the test piece; and 2) test and result determination. On one hand, on the basis of splicing and coating of test pieces, on the premise that a coiled material is not damaged, the water channeling resistance of a waterproof material layer is obtained through the pressure difference change in a pressure channel in a manner of immersion and negative pressure adsorption (changing a traditional water channeling impact mode) under the temperature change or constant temperature working condition; on the other hand, after the test pieces are formed, the adopted clamping not only counteracts the acting force of relative opening of the two test pieces based on the clamping, but also eliminates the adsorption force of the gap sections into the butt joint gap based on the deformation and resetting of the corresponding gap sections before and after the negative pressure; therefore, the waterproof material layer is subjected to a water channeling resistance test without interference of other external force, and the accuracy of a test result is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of waterproof material performance detection, and particularly relates to a waterproof material anti-water-channeling test method under negative pressure and simulated constant temperature or temperature change conditions. BACKGROUND

[0002] At present, the method for testing the anti-water-channeling performance of waterproof coiled material includes the following steps:

[0003] (1) Preparing a test piece, first, a through hole is preset on the waterproof coiled material, and then a standard-shaped test piece is formed on the waterproof coiled material by pouring, and the test piece is demolded and cured under standard conditions; or first, a standard-shaped test piece is formed on the waterproof coiled material by pouring, and the test piece is demolded and cured under standard conditions, and then a through hole is punched on the waterproof coiled material;

[0004] (2) Placing the cured test piece into a permeability tester, and performing permeability detection on the test piece under the conditions of a specified pressure and time, the waterproof coiled material is water-facing, and is pressurized and kept for a period of time, and whether water seeps out from the bonding edge between the waterproof coiled material and the mortar block is observed in real time, and once water seepage occurs, it is determined that the anti-water-channeling performance of the waterproof coiled material is unqualified.

[0005] Although the required anti-water-channeling performance can be obtained according to the detection principle, the following limitations exist:

[0006] 1) In the detection method, the waterproof coiled material must be punched, and the test result is more suitable for the working condition that the waterproof coiled material is used for bottom isolation waterproofing and the surface is formed by pouring, and the detection method is obviously not applicable once the waterproof coiled material is used for other working conditions, for example, the waterproof coiled material is used for non-damaged surface or outer covering of a joint, especially in a complex temperature change environment, and therefore, the anti-water-channeling performance detection under complex working conditions cannot be met.

[0007] 2) The detection method not only has high requirements for the molding and assembly sealing of the test piece, but also can only detect the combination performance of the waterproof coiled material and the test piece, but in actual operation, due to the water-facing pressure on the waterproof coiled material, the water-channeling is further hindered, and the test result has a certain failure rate. SUMMARY

[0008] The present application aims to overcome the deficiencies in the prior art, and provides a waterproof material anti-water-channeling test method under negative pressure and simulated constant temperature or temperature change conditions.

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0010] A waterproof material anti-water-channeling test method under negative pressure and simulated constant temperature or temperature change conditions, the test equipment adopted by the method includes a water tank, a test piece and a negative pressure power component, and the method includes the following steps:

[0011] 1) Test piece forming

[0012] Firstly, two cylindrical concrete or mortar test pieces are selected, and are spliced together in alignment from top to bottom at the end portions to form a butt joint gap; then, a waterproof material is wrapped around the two concrete test piece butt joint end portions based on the butt joint gap to form a waterproof material layer, wherein the waterproof material layer is sealed from the spliced end portions, and the waterproof material layer is divided into a gap segment that seals the circumference of the butt joint gap, and a fitment segment that is wrapped around the two test piece butt joint end portions from both sides of the gap segment, and the length of each fitment segment is less than the length of the wrapped test piece. The two test pieces and the waterproof material layer form a test piece, and a through hole is formed in one test piece that penetrates through the test piece and communicates with the butt joint gap, and the through hole, the butt joint gap, and the gap segment form a pressure channel.

[0013] 2) Test and result determination

[0014] Firstly, a positioning clamp is clamped to the two outer ends of the test piece from the length direction of the test piece to make the butt joint gap shrink and form a force F on the gap segment; then, a pipeline is penetrated through a water tank to connect the power piece and the pressure channel, and the test piece is vertically placed in the water tank, and the water level in the water tank covers the waterproof material layer; then, a negative pressure is formed by the negative pressure power piece, and the negative pressure includes a first negative pressure F1 acting on the gap segment, and a second negative pressure F2 acting between the fitment segment and the test piece. At the same time, in a simulated constant temperature or temperature change working condition, based on F≥F1, the adsorption interference of the gap segment on the fitment segment is eliminated, so that the fitment segment performs a water channeling resistance test under the pressure of F2, and the water channeling resistance of the waterproof material layer is obtained through the pressure difference change in the pressure channel.

[0015] Preferably, the width of the waterproof material layer is greater than or equal to the length of the test piece; and / or, the length of the waterproof material layer is equal to the circumference of a circle formed by the lengthwise projection of the test piece. Under the limitation of width and length, the required test piece structure can be formed.

[0016] According to a specific implementation and preferred aspect of the present application, the width of each fitment segment is at least 3 / 5 of the length of the test piece. The detection failure rate caused by size inconsistency is reduced.

[0017] Preferably, the widths of the two fitment segments are equal. A relatively close detection working condition is provided, which can more accurately obtain the water channeling resistance performance.

[0018] In some specific implementations, the through hole is located in the middle of the test piece. Based on the middle layout, the waterproof material layer is more uniformly impacted by water channeling, so that the water channeling resistance performance of the waterproof material layer is more accurately obtained.

[0019] According to another specific implementation and preferred aspect of the present application, the exposed end of the through hole is installed in a sealing joint, wherein the through hole and the pipeline are sealingly connected based on the sealing joint. The end is used for sealing and switching to facilitate the assembly operation before the test.

[0020] According to still another specific implementation and preferred aspect of the present application, in step 2), the test piece is installed downwardly from the through hole based on the seat, wherein the seat is formed with a mounting hole for the pipeline to communicate with the through hole. In this way, the anti-water channeling test can be implemented in a more labor-saving manner.

[0021] According to still another specific implementation and preferred aspect of the present application, the alignment clamps are multiple and are distributed in a ring array based on the through hole. The array distribution makes the force direction keep relatively parallel, which is more conducive to create a relatively balanced adsorption environment, thereby improving the detection accuracy.

[0022] Preferably, each alignment clamp includes a C-shaped or U-shaped clamp arm and two positioning feet located at the open ends of the clamp arm, wherein one or both of the two positioning feet are adjustably abutted against the two ends of the test piece along the up-down direction.

[0023] In addition, the waterproof material layer is a hot-melt polymer coiled material or a hot-melt construction coiled material; or the waterproof material layer includes a waterproof coating on the inner side and a waterproof coiled material wrapped around the waterproof coating. In short, the test method is applicable to different coiled materials or coatings, and can also be combined with the specific use conditions for high-precision performance detection, and has strong practicability.

[0024] Thanks to the implementation of the above technical solutions, the present application has the following advantages compared with the prior art:

[0025] In the water channeling resistance performance test of the existing waterproofing membrane, the waterproofing membrane must be perforated (or damaged), and the test results are more suitable for the conditions of waterproofing membrane bottom isolation waterproofing and surface pouring. Once the waterproofing membrane is used in other conditions, for example, the surface of the waterproofing membrane is not damaged or the waterproofing membrane is used as the outer layer of the joint, especially in complex temperature change environment, the detection method is obviously not applicable, therefore, it cannot meet the water channeling resistance performance test under complex conditions. In addition, this detection method not only has high requirements for the forming, assembly and sealing of the test piece, but also can only detect the combination performance of the waterproofing membrane and the test piece, therefore, the forming of the test piece and the pressure difference and waterproofing performance of the waterproofing membrane itself will affect the test results, leading to an increase in failure rate. The present application ingeniously solves the various deficiencies of the prior art by overall design of the waterproof material water channeling resistance test method. After using the waterproof material water channeling resistance test method, firstly, two cylindrical concrete or mortar test samples are selected, and the two test samples are vertically aligned and spliced at the ends to form an abutment joint gap; then, the waterproof material is wrapped around the abutment joint gap to form a waterproof material layer, wherein the waterproof material layer is sealed at the spliced end, and the waterproof material layer is divided into a gap segment surrounding the abutment joint gap, and a fitting segment wrapped around the abutment end of each test sample on both sides of the gap segment, and the length of each fitting segment is less than the length of the wrapped test sample, and the two test samples and the waterproof material layer form a test piece, and a through hole is formed in one of the test samples, which penetrates the test sample and communicates with the abutment joint gap, and the through hole, the abutment joint gap and the gap segment form a pressure channel; then, the test piece is clamped at the two outer ends of the test piece from the length direction by using a positioning clamp, so that the abutment joint gap is contracted and an acting force F is formed on the gap segment; then, the power member and the pressure channel are connected by a pipeline penetrating the water tank, and the test piece is vertically placed in the water tank, and the water level in the water tank covers the waterproof material layer; finally, a negative pressure is formed by the negative pressure power member, and the negative pressure includes a first negative pressure F1 acting on the gap segment and a second negative pressure F2 acting between the fitting segment and the test sample, and in the simulation of constant temperature or temperature change conditions, based on F≥F1, the adsorption interference of the gap segment on the fitting segment is eliminated, so that the fitting segment performs water channeling resistance test under the pressure of F2, and the water channeling resistance of the waterproof material layer is obtained by the pressure difference change in the pressure channel, therefore, on the one hand, based on the splicing and wrapping of the test piece, without damaging the waterproofing membrane, by means of immersion and negative pressure adsorption (changing the traditional water channeling impact mode), the water channeling resistance of the waterproof material layer is obtained in the temperature change or constant temperature conditions by the pressure difference change in the pressure channel; on the other hand, the clamping is performed after the test piece is formed, based on the fact that the clamping can offset the acting force of the two test pieces relative to the opening, and based on the fact that the deformation and reset of the corresponding gap segment before and after the negative pressure eliminate the adsorption force of the gap segment to the abutment joint gap, the waterproof material layer performs water channeling resistance test without other external interference, thereby improving the accuracy of the test results. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Front view of the test equipment for the embodiment;

[0027] Figure 2 For Figure 1 Schematic diagram of the test piece and clamping;

[0028] Figure 3 For Figure 2 Schematic diagram of the test piece and clamping;

[0029] Figure 4 For Figure 2 Schematic diagram of the test piece and clamping;

[0030] Wherein: 1, water tank; 10, bracket;

[0031] 2, test piece; 20, cylindrical concrete sample; 20a, butt joint gap; 20b, through hole; 21, waterproof material layer; 21a, gap section; 21b, lamination section; 210, waterproof coating; 211, coiled material layer;

[0032] 3, alignment clamp; 30, clamp arm; 31, positioning foot; 32, lead screw; 33, wheel disc;

[0033] 4, negative pressure power piece; 40, pipeline; 41, valve; 42, pressure gauge; 43, negative pressure pump; 44, sealed joint. DETAILED DESCRIPTION

[0034] In order to make the above objectives, characteristics and advantages of the present application more apparent, comprehensible and easier to understand, the present application will be described in detail below with the aid of the accompanying drawings and specific embodiments. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0040] Example 1

[0041] like Figures 1 to 3 As shown, the waterproof material anti-water-transfer testing equipment based on negative pressure and simulated constant temperature or temperature change conditions in this embodiment includes a water tank 1, a specimen 2, an alignment clamp 3, and a negative pressure power component 4.

[0042] Specifically, the water tank 1 forms a constant temperature water tank or a temperature changing water tank based on the functional requirements, and is selected based on different working conditions, and both constant temperature and temperature change are easy to implement; at the same time, a seat 10 is arranged in the water tank 1, and the test piece 2 is installed on the seat 10 in the water tank 1.

[0043] The test piece 2 includes two cylindrical concrete samples 20 which are abutted to form an abutted gap 20a, and a waterproof material layer 21 which is wrapped around the abutted end portions of the two concrete samples based on the abutted gap 20a.

[0044] In some embodiments, the cylindrical concrete sample 20 is a cylinder with the same size and specification, and a through hole 20b is formed in the middle of one of the cylindrical concrete samples 20. In short, the cylindrical concrete block (or mortar block) has a size of 300mm in diameter and 250mm in height, and one of the blocks needs to be pre-drilled with a through hole of 20mm in diameter. As for the molding of the test block, it can be molded separately or formed into a cylindrical concrete block with a diameter of 300mm and a height of 500mm, and then cut and drilled. The waterproof material layer 21 is a commonly used hot melt construction coiled material (hot melt polymer coiled material), and is commonly used for covering and paving, and the end portions are sealed and overlapped. Specifically, the waterproof material layer 21 is based on the abutted gap 20a, and the waterproof material layer 21 is divided into a gap segment 21a which seals the circumference of the abutted gap 20a, and a fitting segment 21b which fits the abutted end portions of the two samples, respectively. In this example, the width of the waterproof material layer 21 is 300mm, and the length of the waterproof material layer 21 is equal to the circumference of the circle formed by the projection of the test piece in the upward and downward directions. Under the limitation of width and length, the required test piece structure can be formed. Generally, the gap segment 21a is about 1-2mm, and the remaining part is divided into fitting segments 21b (the widths of the two fitting segments in the upward and downward directions are equal), i.e. the width of each fitting segment 21b is about 148mm. Avoiding the invalidation of test results caused by different lengths.

[0045] The alignment clamp 3 has multiple (at least two) and is arranged in a ring array based on the through hole 20b. Based on the array distribution, the direction of the acting force remains relatively parallel, which is more conducive to creating a relatively balanced adsorption environment, thereby improving the detection accuracy. In some embodiments, the alignment clamp 3 includes a C-shaped or U-shaped clamp arm 30, and two positioning feet 31 located at the opening end of the clamp arm 30, wherein one or both of the two positioning feet 31 are adjustably abutted to the two ends of the test piece 2 along the upward and downward directions. Further, the positioning foot 31 located at the lower part is fixed at the lower end of the clamp arm 30; the positioning foot 31 located at the upper part is adjusted by the upward and downward movement of the lead screw 32 and the wheel disc 33, wherein the wheel disc 33 is rotated to drive the lead screw 32 and the positioning foot 31 to move synchronously.

[0046] The negative pressure power component 4 comprises a pipeline 40, a valve 41, a pressure gauge 42, a negative pressure pump 43 and a sealing joint 44. Specifically, the test piece 2 is vertically erected downward from the through hole 20b to the frame 10, and the pipeline 40 is sealingly connected to the through hole 20b through the sealing joint 44. The pipeline 40 is exposed outside the water tank 1 and is in communication with the negative pressure pump 43. The valve 41 and the pressure gauge 42 are arranged on the exposed pipeline 40.

[0047] In summary, the waterproof material anti-water channeling test method under negative pressure and simulated constant temperature or temperature change conditions of the embodiment comprises the following steps:

[0048] 1) Test piece forming

[0049] Firstly, two cylindrical concrete or mortar test samples are selected and are spliced together in alignment from top to bottom to form an abutment gap. Then, a waterproof material is wrapped around the abutment ends of the two concrete test samples to form a waterproof material layer, with the waterproof material layer being sealed from the spliced ends. The waterproof material layer is divided into a gap segment surrounding the abutment gap and a bonding segment wrapped around the abutment ends of the two test samples from both sides of the gap segment. The length of each bonding segment is less than the length of the wrapped test sample. The two test samples and the waterproof material layer form a test piece. A through hole is formed in one of the test samples and is in communication with the abutment gap. The through hole, the abutment gap and the gap segment form a pressure channel.

[0050] 2) Test and result determination

[0051] Firstly, a positioning clamp is used to clamp the two outer ends of the test piece from the length direction of the test piece to shrink the abutment gap and form a force F on the gap segment. Then, the test piece is placed on the frame with the through hole facing downward. A sealing joint is used to connect the pipeline and the through hole. Then, water is added to the water tank to cover the top surface of the test piece (which necessarily covers the entire waterproof material layer). Then, a negative pressure is formed by the negative pressure power component, and the negative pressure includes a first negative pressure F1 acting on the gap segment and a second negative pressure F2 acting between the bonding segment and the test sample. In the simulated constant temperature or temperature change condition, based on F≥F1, the adsorption interference of the gap segment on the bonding segment is eliminated, so that the bonding segment performs the anti-water channeling test under the pressure of F2, and the waterproof material layer is evaluated for its anti-water channeling performance through the pressure difference change in the pressure channel.

[0052] Meanwhile, the embodiment can quickly apply negative pressure and efficiently evaluate the anti-water channeling capability and durability of the waterproof material under extreme pressure.

[0053] Embodiment 2

[0054] In combination Figure 1As shown, the waterproof material anti-water channeling test equipment based on negative pressure and simulated constant temperature or temperature change condition in the embodiment comprises a water tank 1, a test piece 2, an alignment clamp 3 and a negative pressure power piece 4, wherein the water tank 1, the alignment clamp 3 and the negative pressure power piece 4 are the same as those in the embodiment 1, and the difference lies in the structure of the test piece 2.

[0055] Referring to Figure 4 As shown, the test piece 2 comprises two cylindrical concrete samples 20 which are abutted from top to bottom to form an abutted gap 20a, and a waterproof material layer 21 which is wrapped around the abutted end portions of the two concrete samples based on the abutted gap, wherein the waterproof material layer 21 comprises an inner layer and an outer layer, the inner layer is a waterproof coating layer 210, and the outer layer is a coiled material layer 211 which is wrapped around the outer periphery of the waterproof coating layer 210.

[0056] The waterproof material anti-water channeling test method based on negative pressure and simulated constant temperature or temperature change condition in the embodiment comprises the following steps:

[0057] 1) Test piece forming

[0058] Firstly, two cylindrical concrete or mortar samples are selected, and are abutted from top to bottom at the end portions to form an abutted gap; then, the waterproof material is wrapped around the outer periphery of the cylindrical concrete samples to form a waterproof coating layer based on the abutted gap, and then a coiled material layer is wrapped around the outer periphery of the waterproof coating layer, that is, the waterproof coating layer and the coiled material layer arranged inside and outside constitute a waterproof material layer, wherein the waterproof material layer is sealed from the abutted end portions, and the waterproof material layer is divided into a gap segment which blocks the abutted gap in the circumferential direction, and a bonding segment which is wrapped around the abutted end portions of the two samples from the two sides of the gap segment respectively, and the length of each bonding segment is less than the length of the sample wrapped therearound, the two samples and the waterproof material layer constitute a test piece, and a through hole which penetrates through one sample and communicates with the abutted gap is formed on the one sample, the through hole, the abutted gap and the gap segment constitute a pressure channel.

[0059] 2) Test and result determination

[0060] Firstly, the alignment clamp is clamped to the two outer ends of the test piece from the length direction of the test piece, so as to shrink the abutted gap and form a force F on the gap segment; then, the test piece is placed on the support seat with the through hole facing downward, and the pipeline is connected to the through hole by using a sealing joint, then water is added into the water tank, and the water level covers the top surface of the test piece (necessarily covers the entire waterproof material layer); then, the negative pressure power piece forms a negative pressure, and the negative pressure force comprises a first negative pressure force F1 acting on the gap segment and a second negative pressure force F2 acting between the bonding segment and the sample, and in the simulated constant temperature or temperature change condition, based on F≥F1, the adsorption interference of the gap segment on the bonding segment is eliminated, so that the bonding segment performs the anti-water channeling test in the pressure of F2, and the anti-water channeling property of the waterproof material layer is obtained through the pressure difference change in the pressure channel.

[0061] In summary, after using the waterproof material anti-channeling water test method, first, two cylindrical concrete or mortar samples are selected, and the end portions are aligned and spliced from top to bottom to form a butt joint gap; then, the waterproof material is wrapped around the butt joint gap to form a waterproof material layer, wherein the waterproof material layer is sealed from the spliced end portion, and the waterproof material layer is divided into a gap segment that seals the circumference of the butt joint gap, and a fitting segment that wraps around the butt joint end portion of the two samples from the top and bottom of the gap segment, respectively, and the length of each fitting segment is less than the length of the wrapped sample. Two samples and a waterproof material layer form a test piece, and a through hole is formed in one sample that penetrates itself and communicates with the butt joint gap, and the through hole, the butt joint gap and the gap segment form a pressure channel; then, the alignment clamp is clamped to the two outer ends of the test piece from the length direction of the test piece, so that the butt joint gap is contracted and the force F is applied to the gap segment; then, the power piece and the pressure channel are connected by the pipeline penetrating the water tank, and the test piece is vertically placed in the water tank, and the water level in the water tank covers the waterproof material layer; finally, the negative pressure is formed by the negative pressure power piece, and the negative pressure includes the first negative pressure F1 acting on the gap segment and the second negative pressure F2 acting between the fitting segment and the sample. At the same time, in the simulation of constant temperature or temperature change condition, based on F≥F1, the adsorption interference of the gap segment to the fitting segment is eliminated, so that the fitting segment is subjected to the anti-channeling water test under the pressure of F2, and the anti-channeling water performance of the waterproof material layer is obtained by the pressure difference change in the pressure channel. Therefore, on the one hand, based on the splicing and wrapping of the test piece, without damaging the coiled material, by means of immersion and negative pressure adsorption (changing the traditional channeling water impact mode), in the temperature change or constant temperature condition, and the anti-channeling water performance of the waterproof material layer is obtained by the pressure difference change in the pressure channel; on the other hand, the clamping is used after the test piece is formed, based on the clamping that can offset the force of the relative opening of the two test pieces, and based on the deformation and reset of the corresponding gap segment before and after the negative pressure, the adsorption force of the gap segment to the butt joint gap is eliminated, so that the waterproof material layer is subjected to the anti-channeling water test without other external interference, and the accuracy of the test result is provided; the third aspect is that the width of the waterproof material layer is greater than or equal to the length of the test piece; the length of the waterproof material layer is equal to the circumference of the circle formed by the projection of the test piece in the upward direction.Within the width and length limits, the required test piece structure can be formed, the width of each adhering section is at least 3 / 5 of the sample length, which can reduce the failure rate caused by size inconsistency; the widths of the upper and lower adhering sections are equal, which provides relatively close detection conditions and can more accurately obtain the water channeling resistance performance; the fourth aspect through hole is located in the middle of the sample, based on the middle layout, the water channeling impact on the waterproof material layer can be more uniform, so as to more accurately obtain the water channeling resistance performance of the coiled material, and a sealing joint is installed at the exposed end of the through hole, wherein the through hole and the pipeline are sealed and connected based on the sealing joint, and the end is used for sealing and switching, so as to facilitate the assembly operation before the test; the fifth aspect adopts the reverse suction mode, which can more labor-savingly implement the water channeling resistance test, and the alignment clamps are arranged in a ring array distribution based on the through hole, based on the array distribution, the force direction remains relatively parallel, which is more conducive to creating a relatively balanced adsorption environment, so as to improve the detection accuracy; the sixth aspect waterproof material layer is a hot melt high polymer coiled material or a hot melt construction coiled material; or, the waterproof material layer includes a waterproof coating on the inner side and a waterproof coiled material wrapped in the waterproof coating; in short, the test method is suitable for different coiled materials or coatings, and can also be combined with the specific use conditions for high-precision performance detection, and has strong practicality; the seventh aspect two concrete samples are shaped the same and are in the shape of a cylinder, wherein the upper and lower alignment forms a butt joint gap, so that the formed adhering section can be subjected to water channeling resistance test under the same stress; at the same time, the test can not only evaluate the water channeling resistance and durability of the waterproof material under constant pressure or extreme pressure, but also more sensitively and accurately obtain the water channeling resistance performance of the waterproof material layer based on the pressure difference change of the pressure gauge, without manual observation.

[0062] The above detailed description of the present application is intended to enable a person skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application, and any equivalent changes or modifications made according to the spirit and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A waterproof material water channeling resistance test method under negative pressure and simulated constant temperature or temperature change conditions, the test equipment used in the method comprises a water tank, a test piece and a negative pressure power component, characterized in that, The method comprises the steps of: 1) specimen forming First, two cylindrical concrete or mortar specimens are selected, and the two specimens are spliced together in alignment from top to bottom, and an abutment gap is formed; then, a waterproof material is wrapped around the abutment ends of the two concrete specimens based on the abutment gap to form a waterproof material layer, wherein the waterproof material layer is sealed from the spliced ends, and the waterproof material layer is divided into a gap segment that seals the circumference of the abutment gap, and a fit segment that is wrapped around the abutment ends of the two specimens from the two sides of the gap segment, respectively, and the length of each fit segment is less than the length of the specimen wrapped therearound, and the two specimens and the waterproof material layer form a specimen, and a through hole is formed in one of the specimens, which penetrates the specimen and communicates with the abutment gap, and the through hole, the abutment gap, and the gap segment form a pressure channel; 2) test and result determination First, a positioning clamp is clamped to the two outer ends of the specimen from the length direction of the specimen to make the abutment gap shrink and form a force F on the gap segment; then, the power member and the pressure channel are connected by a pipeline that penetrates the water tank, and the specimen is vertically placed in the water tank, and the water level in the water tank covers the waterproof material layer; then, a negative pressure is formed by the negative pressure power member, and the negative pressure includes a first negative pressure F1 acting on the gap segment and a second negative pressure F2 acting between the fit segment and the specimen, and in a simulated constant temperature or temperature change condition, based on F≥F1, the adsorption interference of the gap segment on the fit segment is eliminated to make the fit segment perform a water channeling resistance test under the pressure of F2, and the water channeling resistance of the waterproof material layer is obtained through the pressure difference change in the pressure channel.

2. The waterproof material water channeling resistance test method under negative pressure and simulated constant temperature or temperature change conditions according to claim 1, characterized in that, The width of the waterproof material layer is greater than or equal to the length of the specimen; and / or, the length of the waterproof material layer is equal to the circumference of a circle formed by the length of the specimen in the vertical direction.

3. The waterproof material water channeling resistance test method of negative pressure and analog constant temperature or temperature change working condition according to claim 1, characterized in that, The width of each fit segment is at least 3 / 5 of the length of the specimen.

4. The waterproof material water channeling resistance test method of negative pressure and simulated constant temperature or temperature change working condition according to claim 3, characterized in that, The widths of the two fit segments are equal.

5. The waterproof material water channeling resistance test method of negative pressure and analog constant temperature or temperature change working condition according to claim 1, characterized in that, The through hole is located in the middle of the specimen.

6. The waterproof material water channeling resistance test method of negative pressure and analog constant temperature or temperature change working condition according to claim 1, characterized in that, The exposed end of the through hole is installed in a sealing connector, wherein the through hole and the pipeline are sealingly connected based on the sealing connector.

7. The waterproof material water channeling resistance test method of negative pressure and analog constant temperature or temperature change working condition according to claim 1, characterized in that, In step 2), the specimen is installed in the water tank downward from the through hole based on a support, wherein the support forms a mounting hole for the pipeline to communicate with the through hole.

8. The waterproof material water channeling resistance test method of negative pressure and analog constant temperature or temperature change working condition according to claim 1, characterized in that, There are a plurality of positioning clamps, which are arranged in a ring array based on the through hole.

9. The waterproof material water channeling resistance test method of negative pressure and simulated constant temperature or temperature change working condition according to claim 8, characterized in that, Each positioning clamp comprises a C-shaped or U-shaped clamp arm and two positioning feet located at the open ends of the clamp arm, wherein one or both of the two positioning feet are adjustably abutted to the two ends of the specimen in the vertical direction.

10. The waterproof material water-shunting resistance test method of negative pressure and simulated constant temperature or temperature change working condition according to any one of claims 1 to 9, characterized in that, The waterproof material layer is a hot melt high polymer coiled material or a hot melt construction coiled material; or, the waterproof material layer comprises a waterproof coating on the inner side and a waterproof coiled material wrapped around the waterproof coating.

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