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High performance concrete reinforced by assorted fiber

A technology of reinforced concrete and mixed fibers, which is applied in the field of building materials, can solve the problems of fiber agglomeration, large amount of single fiber doping, and failure to achieve the effect of reinforcement, etc., to achieve improved strength and durability, obvious economic efficiency, and improved The effect of service life

Inactive Publication Date: 2005-10-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that if the amount of a single fiber is too large, it will cause the fibers to form agglomerates and fail to achieve the effect of reinforcement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] High modulus fiber: carbon fiber;

[0011] Low modulus fiber: nylon fiber;

[0012] Concrete: The gradation is cement: gravel: sand: water = 1: 2.5: 2.1: 0.5. The cement is 52.5R Portland cement.

[0013] fiber volume content

[0014] It can be seen from the test results that carbon-nylon hybrid fiber concrete can greatly improve the flexural strength and impact resistance of concrete. The impact resistance of carbon-nylon fiber concrete is 7.7 times that of plain concrete and 1.8 times that of carbon fiber concrete.

Embodiment 2

[0016] High modulus fiber: steel fiber;

[0017] Low modulus fiber: nylon fiber;

[0018] Concrete: The gradation is cement: gravel: sand: water = 1: 3.3: 2.3: 0.5. The cement is 52.5R Portland cement.

[0019] fiber volume content

[0020] It can be seen from the test results that steel-nylon hybrid fiber concrete can greatly improve the bending strength and impact resistance of concrete. According to the number of failures, the impact resistance of steel-nylon fiber concrete is 8.9 times that of plain concrete, and the steel fiber concrete 2.2 times.

Embodiment 3

[0022] High modulus fiber: steel fiber;

[0023] Low modulus fiber: vinylon fiber;

[0024] Concrete: The gradation is cement: gravel: sand: water = 1: 3.3: 2.3: 0.5. The cement is 52.5R Portland cement.

[0025] fiber volume content

[0026] It can be seen from the test results that steel-vinylon fiber hybrid fiber concrete can greatly improve the flexural strength and impact resistance of concrete. The impact resistance of steel-vinylon fiber concrete is 10.1 times that of plain concrete and 2.5 times that of steel fiber concrete.

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PUM

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Abstract

The present invention relates to a high-performance mixed fibre reinforced concrete, its composition includes (by volume %) high elastic modulas fibre 1%-5%, low elastic modulus fibre 0.2%-3% and the rest general concrete, the described high elastic modulus fibre is one of steel fibre, carbon fibre and glass fibre, and the described low elastic modulus fibre is one of vinylon fibre, polypropylene fibre, acrylic fibre, nylon fibre and polyethylene fibre. Said invention can be used for making manhole cover which not only has higher strength, but also has higher impact resistance.

Description

technical field [0001] The invention relates to concrete, in particular to a high-performance hybrid fiber-reinforced concrete. It belongs to the technical field of building materials. Background technique [0002] Among engineering materials, short fibers are widely used to reinforce concrete materials. According to the elastic modulus of the fiber, it is divided into two types of fibers: high elastic modulus fiber and low elastic modulus fiber. High elastic modulus fiber refers to steel fiber, carbon fiber, glass fiber and other fibers whose Young's modulus is higher than that of concrete, and low elastic modulus fiber refers to vinylon fiber, polypropylene fiber, acrylic fiber, nylon fiber, polyethylene fiber and other fibers with low elastic modulus fibers in concrete. Fibers with high elastic modulus can increase the tensile strength of concrete; fibers with low elastic modulus have no effect on the strength of concrete, but can greatly improve the impact resistance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/38
Inventor 王增春南建林何艳丽
Owner SHANGHAI JIAO TONG UNIV
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