Manufacturing method of test piece for tensile test of chopped bundle fibers for fixing cement concrete

A technology of cement concrete and tensile test, which is applied in the preparation of test samples and the use of stable tension/pressure to test the strength of materials, etc. It can solve the problems of damage detection data, inaccuracy, etc., so as to solve the damage of fibers and improve The effect of test efficiency and simplicity of preparation process

Inactive Publication Date: 2018-06-29
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to solve the inaccurate detection data caused by the damage and slippage of the chopped strand fiber used in cement concrete by the traditional clamping method, and is designed for the tensile strength test of the chopped strand fiber used in cement concrete Test piece production method

Method used

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  • Manufacturing method of test piece for tensile test of chopped bundle fibers for fixing cement concrete
  • Manufacturing method of test piece for tensile test of chopped bundle fibers for fixing cement concrete
  • Manufacturing method of test piece for tensile test of chopped bundle fibers for fixing cement concrete

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Experimental program
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Embodiment Construction

[0026] 1. Mold structure description:

[0027] like figure 1 As shown, the mold assembly is mainly composed of a base 1 , two sets of frame-shaped molds 2 and a number of buckles 3 .

[0028] The base 1 is provided with a straight slide rail 1-1 with a scale, and one side of each group of frame-shaped molds 2 is provided with a slide block 2-1 matched with the straight slide rail 1-1. With the cooperation of the straight slide rail 1-1, the slider 2-1 can be positioned on the straight slide rail 1-1 through the buckle 3.

[0029] A plurality of slots 2-2 are arranged on the upper surface of each group of frame-shaped molds 2, and the length and width of each slot 2-2 are respectively 20 mm and 20 mm.

[0030] 2. Take the chopped strand glass fiber as an example to prepare the sample:

[0031] Through the movement of the slider 2-1 on the straight slide rail 1-1, according to the length of the fiber sample required for the test, the distance between the two groups of frame-s...

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Abstract

The invention discloses a manufacturing method of a test piece for a tensile test of chopped bundle fibers for fixing cement concrete, and belongs to the technical field of strength tests of fibers for cement concrete. A die is used, thus the sample preparation process is simple, and multiple samples can be manufactured at the same time. The manufacturing method is characterized in that two ends of chopped bundle fibers for fixing cement concrete are wrapped by smooth surfaces of small square paper sheets, thus a clamp does not directly contact with the chopped bundle fibers, and the chopped bundle fibers will not be damaged by the clamp. Super glue is used to prevent the chopped bundle fibers from falling, when the chopped bundle fibers are not firmly clamped or the clamping method is notproper. The test efficiency is improved, and the detected data is objective and accurate.

Description

technical field [0001] The invention belongs to the technical field of fiber strength testing for cement concrete. Background technique [0002] Concrete is a major consumer of construction projects. Traditional concrete has obvious shortcomings such as large volume shrinkage and inability to corrosion. Adding fibers to concrete can significantly improve these shortcomings of concrete. Cement concrete uses chopped strand fibers as fibers commonly used in engineering in my country. , its strength directly affects the performance of fiber-reinforced composite materials, it is particularly important to test the strength of chopped strand fibers for cement concrete. [0003] The traditional fiber method: cut a certain length of fiber according to the test requirements, clamp the two ends of the fiber directly on the two fixtures, start the detector, and make one fixture and the other fixture have displacement, so that the fiber Breaking occurs under tension, and the tensile forc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N3/08
CPCG01N1/28G01N3/08
Inventor 杨鼎宜葛晨周兴宇毛子铭朱文婷王天琪吕锦飞王志旺张旭董亚超
Owner YANGZHOU UNIV
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