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A testing fixture and testing method for tensile bond strength between mortar surface layer and substrate

A technology for tensile bond strength and testing fixtures, applied in the direction of strength characteristics, using stable tension/pressure to test material strength, measuring devices, etc., can solve the problem of inability to obtain the bond strength between the mortar surface and the base, and the top pull It takes time and effort to clean the adhesive on the surface of the board, and the bonding surface is wet, etc.

Inactive Publication Date: 2014-10-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] (1) Adhesives are required to paste the top drawing plate on the mortar layer. The adhesives usually used require the bonding surface to be dry, and water is usually required in the process of cutting the sample, so it takes a long time for the sample to dry before proceeding. Paste, so there is often the problem of weak paste caused by wet bonding surface
[0014] (2) When the adhesive is pasted on the facade and the top is pulled out, the adhesive is prone to flow, and the adhesive will stick to the mortar when it flows to the cutting seam, thus affecting the test results
[0015] (3) The top drawing board is heavy, and it takes a certain time for the adhesive to exert its cohesive force. Therefore, the standard requires that the top pasting board should be fixed with adhesive tape in time after pasting, and the fixing of the adhesive tape is not easy to operate.
[0016] (4) The adhesives and tapes used are disposable materials, which have environmental pollution problems
[0017] (5) After the experiment, the cleaning of the adhesive on the surface of the top drawing board is very time-consuming and laborious
[0018] (6) Due to the difference between the surface layer and the interior of the mortar, and the strength of the mortar surface layer is low, the surface layer of the mortar is often pulled apart during the tensile test, rather than the mortar and the base material, and the mortar surface layer and the base material cannot be obtained. The real bond strength of the test data is relatively large

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  • A testing fixture and testing method for tensile bond strength between mortar surface layer and substrate
  • A testing fixture and testing method for tensile bond strength between mortar surface layer and substrate

Examples

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Embodiment 1

[0044] Such as figure 1 As shown in the present invention, a test fixture for the tensile bond strength between the mortar surface and the substrate includes a top drawing plate 1, fasteners and two splints 2; the center position of the top drawing plate 1 is provided with a The joint 3 connected by the bond strength tester; the fastener includes a bolt 4, a nut 5 and a washer 6; wherein, the top drawing plate is a circular plate with a diameter of 50 mm.

[0045] Such as figure 2 As shown, the upper and middle parts of each plywood are semi-cylindrical, the upper part is provided with a groove 7; the middle part is provided with a bolt hole 8, and the lower part is a clamping part 9 for clamping the mortar surface; the clamping part 9 is semi-cylindrical , the side in contact with the mortar surface layer is provided with a score 10 . In this embodiment, the cross-sectional area of ​​the middle part of the splint is larger than the cross-sectional area of ​​the clamping pa...

Embodiment 2

[0055] A fixture for testing the tensile bonding strength of a mortar surface layer and a substrate in the present invention includes a top drawing plate, a fastener and two splints; the fastener includes bolts, nuts and gaskets; wherein, the top drawing plate is 40mm ×40mm square plate, the side of the bolt contacting the splint is hemispherical.

[0056] The upper and middle parts of each splint are flat, with grooves on the upper part; bolt holes in the middle, and clamping parts for clamping the mortar surface at the bottom; the clamping part is flat, and the part in contact with the mortar surface Scores on one side. In this embodiment, the cross-sectional area of ​​the middle part of the splint is larger than the cross-sectional area of ​​the clamping part to form a protrusion above the clamping part.

[0057]When the detection fixture of the present invention is in use, the clamping part clamps the mortar surface layer, the protrusion above the clamping part is stuck o...

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Abstract

The invention discloses a mortar surface layer and base body tensile bonding intensity detecting clamp, which comprises a top pull-draw plate, a fastening element and two clamp plates, wherein the upper part of each clamp plate is provided with a groove, the lower part of each clamp plate is provided with a clamping part used for clamping a mortar surface layer, when the detecting clamp is used, the clamping part clamps the mortar surface layer, the top pull-draw plate is clamped in the grooves of the two clamp plates, and the two clamp plates are fixedly connected through the fastening element. The invention also discloses a mortar surface layer and base body tensile bonding intensity detecting method using the detecting clamp. Compared with the prior art, the detecting device and the detecting method can be used for testing the real bonding intensity of the mortar surface layer and the base body and have the advantages that the use is convenient, the experiment efficiency is high, and the environment is protected.

Description

technical field [0001] The invention relates to the field of testing the tensile bonding strength of a mortar surface layer, in particular to a jig and a detection method for detecting the tensile bonding strength of a mortar surface layer and a substrate. Background technique [0002] Mortar is a commonly used building material, which plays the role of bonding, lining and transmitting stress in civil engineering, including masonry mortar, plastering mortar, ground mortar and other types. Through the bonding of mortar and other materials, it becomes a whole, so the bond strength of mortar is very important. [0003] In recent years, with the development of ready-mixed mortar technology, more and more attention has been paid to the bonding performance of mortar. Unlike traditional mortars that only focus on work performance and compressive strength, the "Ready-Mixed Mortar" (JG / T 230-2007) standard also proposes tensile bond strength requirements for plastering mortars and w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/08
Inventor 杨医博郭文瑛王恒昌莫海鸿
Owner SOUTH CHINA UNIV OF TECH