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Tensile test manufacturing method of synthetic crude fibers in concrete

A technology of tensile testing and production method, which is applied to the testing and production of synthetic crude fibers in concrete, and the tensile strength testing field of crude fibers. The effect of reducing the difficulty of test operation

Active Publication Date: 2018-07-24
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is exactly for the problem of fiber slippage during the test of synthetic crude fiber, proposes a kind of reasonable, effective, can improve the testing precision and is used for the tensile test preparation method of synthetic crude fiber in concrete

Method used

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  • Tensile test manufacturing method of synthetic crude fibers in concrete
  • Tensile test manufacturing method of synthetic crude fibers in concrete
  • Tensile test manufacturing method of synthetic crude fibers in concrete

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Experimental program
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Embodiment Construction

[0026] 1. Prepare the fixed plate for surface roughening:

[0027] Such as figure 1 As shown, cut the bulky fixing plate material into a fixing plate 1 of 20 mm×15 mm, and ensure that the cut part is flat and smooth. Then, one side of the fixed plate 1 is polished with a file until the surface is rough, and the surface powder is removed to make the polished surface clean and tidy.

[0028] The above fixing plate material is a material suitable for bonding with synthetic thick fibers, and the thickness is 1.5-2 mm.

[0029] 2. Pretreatment of synthetic crude fiber:

[0030] Squeeze both ends of the synthetic thick fiber 2 into a flat shape 2-1 with a vise, and the extruded length is not less than 8mm.

[0031] 3. Fixed synthetic crude fiber:

[0032] Such as figure 2 As shown, the two ends of the pretreated synthetic crude fiber 2 are respectively bonded between two polished fixing plates 1, wherein the inner end 2-2 of the processed crude fiber 2 should be stretched into...

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Abstract

The invention discloses a tensile test manufacturing method of synthetic crude fibers in concrete, and relates to the field of testing fibers for concrete. Two ends of synthetic crude fibers are extruded into flat shapes, and then the two ends of the synthetic crude fibers are bonded through fixing glue between fixing plates with roughened surfaces respectively. During a tensile test, the front end position of a clamp of a tensile tester is consistent with the inner ends of the parts which are extruded into flat shapes of the synthetic crude fibers, and the length direction of the synthetic crude fibers is perpendicular to the transverse direction of the clamp of the tensile tester. The method provided by the invention is beneficial to controlling a sliding phenomenon of the crude fibers in a stretching link, reduces the operation difficulty of the test in the process of bonding the crude fibers, speeds up the test process, and enables the test to be convenient and easy to operate, andthe final data of the test to be more accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of fiber strength testing, in particular to the tensile strength testing of thick fibers used in concrete. [0002] The field of testing, in particular relates to a testing method for synthetic coarse fibers in concrete. Background technique [0003] Synthetic coarse fibers are commonly used materials in concrete, which can improve the toughness of concrete and prevent concrete from cracking. The CN201510473489 patent document discloses a method for testing the tensile strength of a whole bundle of fibers for cement and concrete, which uses kraft paper bonded with epoxy resin to test the tensile strength of a whole bundle of fibers. The CN201510473541 patent document discloses a method for testing the tensile strength of fiber monofilaments for cement and concrete. The fiber monofilaments are bonded to each zigzag strip located on the same side of the folding line; the plane paper is folded in half and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28G01N1/286
Inventor 杨鼎宜周兴宇葛晨王天琪刘鑫吕锦飞王志旺毛子铭罗洪林
Owner YANGZHOU UNIV
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