Testing device and method for bonding performance of fiber and mortar materials

A technology of bonding performance and mortar material, which is applied in the direction of measuring device, analyzing material, using mechanical device, etc., to achieve the effect of convenient operation and simple device

Inactive Publication Date: 2012-08-08
JINLING INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a fiber and mortar material bonding performance testing device for the current problem that it is difficult to provide relevant technical

Method used

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  • Testing device and method for bonding performance of fiber and mortar materials
  • Testing device and method for bonding performance of fiber and mortar materials
  • Testing device and method for bonding performance of fiber and mortar materials

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0024] Example 1.

[0025] like Figure 1-4 shown.

[0026] A fiber and mortar material bonding performance testing device, which includes a test piece forming mold 1 ( figure 2 ) and tensile test fixture 2 ( image 3 , 4 ), the test piece forming mold 1 includes a left mold 3, a right mold 4 and a plastic insert 5, and the left mold 3 and the right mold 4 are spliced ​​to form a "8"-shaped cavity (such as figure 2 a), in the left mold 3, the right mold 4 and the middle position, there is a slot 6 for inserting one side of the plastic insert 5, and the plastic insert 5 is provided with one end for the fiber to pass through. , A number of through holes that match the diameter of the fiber, on one side of the left mold 3 and the right mold 4, there is a side transverse slit 7 that communicates with the inner cavity, and the side transverse slit 7 is fixed with and passes through the plastic insert 5. One end of the through-hole fiber 12 is connected to a connecting line...

Example Embodiment

[0027] Example two.

[0028] A method for testing the bonding properties of fibers and mortar materials, comprising the preparation, clamping and tensile test of a test piece, wherein the preparation steps of the test piece are:

[0029] First, punch several small holes in the center of the plastic insert according to the diameter of the fibers to be tested, and then pass the fibers to be tested through the small holes;

[0030] Secondly, wind one end of the fiber to be tested into a loop or heat it into a knot at high temperature to strengthen the anchoring of the end in the high-strength mortar and ensure that the end will not debond during tensile loading;

[0031] Third, insert the plastic insert with the fiber to be tested into the slot in the middle of the "8"-shaped test piece forming mold, and divide the cavity of the test mold into two parts by the plastic insert;

[0032] Fourth, pour high-strength mortar material in half of the test piece forming mold of the an...

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Abstract

Provided are a testing device and a testing method for bonding performance of fiber and mortar materials, wherein the device comprises a testing specimen forming mold (1) and a tensile testing fixture (2), the testing specimen forming mold (1) includes a left mold (3), a right mold (4) and plastic inserts (5), an '8' shaped cavity is formed by splicing the left mold (3) with the right mold (4), slots (6) for inserting one side of the plastic inserts (5) are arranged at the left mold (3), the right mold (4) and a middle position, the plastic inserts (5) are provided with a plurality of through holes, side transverse slits (7) are arrange at one side of the left mold (3) and one side of the right mold (4); the tensile testing fixture (2) is composed of an inner arc-shaped chuck (8) matching with the shape of an end part of a testing specimen (11), a spheric joint (9) and a connecting bolt (10). The device and the method of the invention are simple and practicable, and have high testing precision.

Description

technical field [0001] The invention relates to a material testing device and method, in particular to a fiber bonding strength testing device and method in fiber-containing mortar, in particular to a fiber and mortar material bonding performance testing device and method. Background technique [0002] As we all know, fiber cement-based composite materials have been widely used in domestic and foreign projects to reduce the shrinkage and deformation of cement substrates and improve their crack resistance. Its anti-crack performance is closely related to the performance of the fiber itself and the interface bonding strength with the cement substrate. The interfacial bond strength can be obtained by methods such as fiber pull-out test, fiber intrusion test, fiber breakage test, and bead debonding test. For brittle substrates that are easy to crack, such as concrete and mortar, when a crack occurs, the fibers bridge the two sides of the crack, which is similar to the fiber pul...

Claims

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Application Information

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IPC IPC(8): G01N19/04
Inventor 宣卫红孔祥双陈育志
Owner JINLING INST OF TECH
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