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Test method for anti-permeability performance of fluid sealant and substrate bonding sample interface

A test method and sealant technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of strong impermeability of the bonding interface and low impermeability of the bonding interface, and achieve strong guidance, Simple operation and convenient use effect

Inactive Publication Date: 2009-07-15
NORTHWEST A & F UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The level of bonding strength directly affects the strength of impermeability, the bonding interface with high bonding strength has strong impermeability, and the bonding interface with low bonding strength has low impermeability

Method used

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  • Test method for anti-permeability performance of fluid sealant and substrate bonding sample interface

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Embodiment Construction

[0013] In the present invention, the anti-seepage sample is composed of the substrate to be bonded and the sealant. The size of the cavity in the substrate to be bonded and the specific size of the sample can be determined according to the actual size of the simulated specific project or the purpose of the test. Cured for 28 days in an environment with a temperature of 20±2°C and a relative humidity of 65±5%.

[0014] The anti-seepage sample has the following characteristics: first, ensure that the interface between the substrate to be bonded and the sealant is the only channel for water to exit. If the base material is porous material such as concrete, mortar, solidified soil, brick, wood, etc., apply an anti-seepage layer evenly on the bottom and side walls of the base soil of the impervious sample. The anti-seepage layer can be mixed with liquid paraffin or butter cement thing. Secondly, a piece of rubber gasket with a gap in the middle is placed on the upper and lower par...

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Abstract

The invention discloses a method for testing interface impervious strength of the sample bonded by sealant and base material. The method comprises: reserving a seam cavity of a certain size in the middle of the bonded base material sample, filling sealant into the seam cavity to bond the base material and the sealant into an integral body to obtain a impervious sample of the size matching the water pressure chamber; maintaining the impervious sample in the environment with temperature of 20+ / -2 degrees centigrade and relative humidity of 65+ / -5% for 28 days; fixing the tested cylindrical impervious sample into a steel sample jacket mould; placing upon the water pressure chamber of impervious instrument ensuring that the bonded interface of the sealant and base material is the only channel of the pressure water; increasing the water pressure of the permeability instrument at regular intervals for 0.1MPa each time from 0.1MPa until water seeps from the impervious sample surface; and determining the previous water pressure as the impervious strength of the interface of base material and sealant. The invention has simple operation, need not adding other equipments, it can test the impervious strength of various composite material structure.

Description

technical field [0001] The invention belongs to the field of performance testing of building materials, in particular to a method for testing the interface impermeability of a sealant and a base material bonding sample. Background technique [0002] The sealant used as an anti-seepage sealing material does not need to be tested for anti-seepage performance because of its high impermeability level. However, after the base material and the sealant are bonded, depending on the material of the base material, it may be permeable or impermeable. When the sealant is bonded to substrates of different materials, the bonded interface is often the part with the weakest impermeability. Since the bonding surface is composed of two materials, first of all, the porosity, void pattern, roughness of the substrate surface, and the type, ratio, and viscosity of the polymer sealant all affect the bonding strength. In addition, the cleanliness, roughness, dry humidity of the substrate interfac...

Claims

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Application Information

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IPC IPC(8): G01N3/08
Inventor 张慧莉娄宗科田堪良何武全姚汝方
Owner NORTHWEST A & F UNIV
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