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Low-temperature performance test device and test method for simulating waterproof membrane material under stress

A technology for low-temperature performance and testing equipment, which is applied in the direction of measuring equipment, analysis materials, and preparation of test samples. Comprehensive impact and other issues

Active Publication Date: 2017-04-19
成都市嘉洲新型防水材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a low-temperature performance test device for simulating waterproof membrane materials under stress, which solves the problem that the current detection methods for various material properties are single-item detection, such as the strength, deformation and static low-temperature performance of materials, that is, various performance The test is divided into a single test to complete, without considering the comprehensive influence of simultaneous action and interaction in the field environmental conditions, especially the various external forces on the waterproof material, so it cannot reflect the real material performance during service

Method used

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  • Low-temperature performance test device and test method for simulating waterproof membrane material under stress

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The low temperature performance test under tension is shown in Table 1.

[0080] Table 1

[0081]

[0082] Note: The test is carried out according to the tensile ratio of 30%, 60%, and 90%, corresponding to the initial pressure of 0.0MPa, the temperature is graded as -10~-35°C, the interval is 5°C, the film thickness is 2.5mm, and the temperature interval is 120 minutes . Since there are too many experimental groups, the data of representative experimental groups are selected in the table, and the fracture standard is the appearance of cracks.

Embodiment 2

[0084] The low temperature performance test under tension + compression is shown in Table 2.

[0085] Table 2

[0086]

[0087] Explanation: The tensile rate and temperature of the test are as before, the initial pressure is 0.2MPa, the film thickness is 2.5mm, and the interval time of each temperature is 120 minutes. Due to the large number of experimental groups, the data of representative experimental groups are selected in the table, and the fracture standard is the occurrence of cracks.

Embodiment 3

[0089] The freeze-thaw cycles under tension are shown in Table 3.

[0090] table 3

[0091]

[0092] Explanation: The test tensile rate and temperature classification are as before, the initial pressure is 0.0MPa, the thickness of PVC waterproof board on the market is randomly selected to be 1.5mm, and the freeze-thaw cycle is 2 hours. Due to the large number of experimental groups, the data of representative experimental groups are selected in the table, and the fracture standard is the occurrence of cracks.

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Abstract

The invention discloses a device and a method for testing the cryogenic property of simulation waterproof membrane material under the stress condition, wherein a fixed stress application bracket is provided with a water tank; a waterproof membrane test piece is spread on the water tank; the water tank can be cooled by a refrigerant in a refrigeration chamber; a movable screw rod stress application rack is supported by the fixed stress application bracket; the test piece is pulled by the movable screw rod stress application rack; the membrane material test piece is stretched by a stress application nut and a screw rod of the movable screw rod stress application rack in a way of spiral stress application; the scale mark of the movable screw rod stress application rack is overlapped with the set scale mark of the fixed stress application bracket, so that the stretched length is reached; a test piece press plate stress application clip is arranged in place, and is located in the center part together with a transparent test piece press plate by the scale mark; a test piece press plate stress application screw rod is screwed for pressing; a gap between the transparent test piece press plate and the fixed stress application bracket is measured, and the frost heaving pressure is adjusted; the temperature change is observed by a temperature gauge; the change of the test piece is observed by the transparent test piece press plate, and the temperature change interval time is recorded. The device and the method have the beneficial effect that the real material property is reflected in the service period.

Description

technical field [0001] The invention belongs to the technical field of material performance testing equipment, and relates to a low-temperature performance testing device and a testing method for simulating a waterproof membrane material under stress. Background technique [0002] In various tunnels and other underground projects of basic engineering facilities in alpine regions, in addition to the conventional standards for anti-leakage water requirements, the low-temperature performance of materials must also be considered. Since the project life is generally 50 to 100 years, waterproof materials Higher requirements are put forward for the durability of waterproofing, and once there is a problem with the waterproofing of underground projects, it is difficult to repair. Therefore, the engineering community urgently needs relevant testing methods and standards for waterproofing materials that meet the actual situation. In engineering practice, waterproof materials are not on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/18G01N3/02G01N1/28
Inventor 杨其新刘东民盛草樱蒋雅君张玉兰
Owner 成都市嘉洲新型防水材料有限公司