Strong test method for peeling adhesive bonding sample of sealant and substrate

A technology of peel strength and testing methods, applied in the direction of measuring devices, analysis materials, instruments, etc., to achieve significant guidance and reference value

Inactive Publication Date: 2011-11-09
NORTHWEST A & F UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there is no specification that has a test method for the peeling strength of sealing materials that simulates actual engineering conditions

Method used

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  • Strong test method for peeling adhesive bonding sample of sealant and substrate
  • Strong test method for peeling adhesive bonding sample of sealant and substrate

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Embodiment Construction

[0011] Referring to Fig. 1, according to the technical scheme of the present invention, the concrete 3 is made into two T-shaped samples, and a gap cavity of a certain size is reserved in the middle of the two T-shaped samples, and the sealant 2 is poured into the gap cavity, so that the concrete And the sealant becomes a bonded sample as a whole, and the bonded sample is maintained in an environment with a temperature of 20±2°C and a relative humidity of 65±5% for 28 days.

[0012] During the test, use a sharp blade to cut a hole whose length is not more than one-tenth of the total length of the joint interface as the peeling port 4 on the bonding surface of the sealant 2 and the concrete 3, and place the two ends of the concrete 3 in the fixture 1 respectively , connect fixture 1 to the tension machine, start the tension machine at a rate of 5mm / min, and stretch fixture 1 in the opposite direction until the sealant 2 and concrete 3 are completely peeled off. At this time, the...

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Abstract

The invention discloses a testing method of the peeling strength between a sealing gum and a stuck sample of a stuck base material, which manufactures the stuck base material sample into two T-shaped sample blocks, and a cavity with specified size is reserved in the middle for injecting the sealing gum, thus integrating concrete and the sealing gum into a whole stuck sample which is placed in theenvironment with the temperature of 20 DEG C minus or plus 2 DEG C and the relative humidity of 65 percent minus or plus 5 percent for being conserved for 28 days. When in test, an opening with the length not larger than one tenth of the total seaming interface length is cut between the bonding surfaces of the sealing gum and a cement mortar by a sharp blade and is used as a peeling opening, the sample is placed in a clamping tool, the clamping tool is connected with a tensile machine which is operated at the speed of 5 millimeters per minute, the stuck base material is stretched in an opposite direction, and until the sealing gum 2 is totally peeled off the concrete 3, the largest tensile value is the peeling strength between the sealing gum and the stuck base material sample. The testing method of the peeling strength between the sealing gum and the stuck sample of the stuck base material has simple operation, convenient use and favorable popularization, has no need of new additional equipments, and has strong guidance and remarkable industrial practice significance to specific industrial practices.

Description

technical field [0001] The invention belongs to the field of performance testing of building materials, and in particular relates to a method for testing the peeling strength of a bonded sample of a sealant and an adhered substrate. Background technique [0002] At present, the method of testing the bonding tensile strength of sealing materials has been very mature. However, in engineering practice, due to imperfect interface treatment or improper operation by construction personnel, or the direction of external force, etc., the edge of the sealing material and the bonding substrate is easy to be peeled off, and the peeling part gradually makes the sealant and substrate Material separation, disengagement, resulting in water leakage, severe cases can damage the local project or the overall anti-seepage layer, it can be seen that the test of peeling strength is necessary. However, so far, there is no specification that has a test method for the peeling strength of sealing mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
Inventor 张慧莉汪有科田堪良娄宗科何武全姚汝方
Owner NORTHWEST A & F UNIV
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