Use of hollow porous fiber in rigid self-waterproof concrete

A self-waterproof concrete and porous fiber technology, which is applied in the application field of the fiber in rigid self-waterproof concrete, can solve the problems of broken bridge deck, reduced structural function, leakage and salt frost, etc., to reduce steel corrosion and improve Effects of water repellency, improvement of tensile strength and toughness

Inactive Publication Date: 2007-07-11
SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Freeze-thaw damage, steel corrosion, alkali-aggregate reaction, concrete carbonation, etc. are regarded as the main durability problems of concrete. Roof and basement leaks lead to problems such as the decline in the use of the structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Hollow porous polypropylene fibers can effectively improve the crack resistance of concrete

[0021] Tests show that the hollow porous polypropylene fiber improves the crack resistance of concrete by 99.5%. Compared with the currently commonly used solid polypropylene fiber, the degree of improvement is about 30% higher;

Embodiment 2

[0022] Example 2: Hollow porous polypropylene fibers can improve the early strength of concrete

[0023] After the hollow porous polypropylene fiber is added to the concrete, due to the existence of the hole, the fiber can lock part of the water in the concrete, so that the concrete can effectively resist the generation of plastic shrinkage cracks during the hardening process. In this way, the water accumulated on the surface of the concrete can also be reduced, which is beneficial to improve the early strength of the concrete.

Embodiment 3

[0024] Embodiment 3: Adding this fiber can improve the splitting tensile strength of concrete. Compared with the concrete without fiber, the amount of this fiber in C20 concrete per cubic meter is 0.9kg / m 3 When it is used, its splitting tensile strength can be increased by 15%; while ordinary polypropylene fiber can only increase the tensile strength of concrete by 5-10%;

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PUM

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Abstract

The invention discloses an application of hollow microhole fiber in the rigidity self-waterproof concrete product, which is characterized by the following: making the fiber section hollow with 3-9 holes and hollow degree more than 20%; obtaining the fiber with hollow rate more than 98%, diameter at 20-50um, strength more than 500N / mm2, elastic modulus more than 3500N / mm2, extending rate at 15-30%, length at 6-25nm, fiber quantity at 76-200, 0000 / kg and density over 0.70g / cm3; improving strength for extension and flexibility of concrete product; resisting impaction, permeatability and freezing.

Description

【Technical field】 [0001] The invention relates to the application of a hollow porous fiber, in particular to the application of the fiber in rigid self-waterproof concrete. 【Background technique】 [0002] Freeze-thaw damage, steel corrosion, alkali-aggregate reaction, concrete carbonation, etc. are regarded as the main durability problems of concrete. Leakage in the roof and basement leads to problems such as the decline in the use and function of the structure. By analyzing the causes of various diseases, it is found that water is one of the most direct and important causes of these damages. Therefore, cutting off the source of water fundamentally means doing a good job of waterproofing the structure to ensure that the concrete structure is not damaged. , Effective measures to prolong the service life and improve the durability of the structure. [0003] Waterproof concrete is usually used in structural self-waterproofing, which relies on the compactness and crack resista...

Claims

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Application Information

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IPC IPC(8): C04B14/38C04B28/00C04B111/27
CPCC04B2111/27C04B20/0056
Inventor 张海文何唯平
Owner SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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