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Anti-crack fiber for water reducing type concrete and mortar

A technology of anti-cracking fiber and concrete, which is applied in the fields of anti-cracking fiber for mortar and water-reducing concrete, and can solve the problems of adding anti-cracking and good workability

Inactive Publication Date: 2010-07-14
SHANGHAI LUOYANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result that adding crack resistance and good workability cannot be achieved at the same time

Method used

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  • Anti-crack fiber for water reducing type concrete and mortar
  • Anti-crack fiber for water reducing type concrete and mortar

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific embodiments.

[0026] Anti-cracking fibers for water-reducing concrete and mortar are selected from horse chestnut wood, and the cellulose fibers with high strength and high elastic modulus are extracted through biological fiber extraction technology, and the surface of the extracted cellulose fibers is coated with a chemical alkali-resistant coating; Adding a water reducer to the cellulose fibers coated with a chemical alkali-resistant coating to prepare water-reducing concrete and anti-cracking fibers for mortar, wherein the water-reducing agent is polycarboxylate water-reducer or naphthalene sulfonate Formaldehyde condensation product water reducing agent, the weight ratio of the cellulose fiber to the water reducing agent is: cellulose fiber: 15%-30%; water reducing agent: 70%-85%; wherein the water reducing rate of the water reducing agent is not less than 20%.

[0027] Cellulose fi...

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Abstract

The invention relates to an anti-crack fiber for water reducing type concrete and mortar. A preparation method comprises the following steps of: selecting horse chestnutn timber, extracting high-strength high-elastic modulus cellulose fiber thereof through biological fiber extraction technology, and coating a chemical alkali-resistant coating layer on the surface of the extracted cellulose fiber; and adding a water reducing agent to the cellulose fiber coated with the chemical alkali-resistant coating layer to prepare the anti-crack fiber for the water reducing type concrete and mortar. The fiber has natural hydrophilism and a hollow cavity structure; and the hollow cavity structure can store part of free water in the early hydration stage, does not influence the working performance of the concrete, the mortar and other cement-based composite materials, and can improve the working performance of the concrete, the mortar and other cement-based composite materials.

Description

technical field [0001] The invention relates to an additive-type functional material of cement-based composite materials such as concrete and mortar, in particular to a crack-resistant fiber for water-reducing concrete and mortar. Background technique [0002] The fibers used in various projects to improve the crack resistance of cement-based composite materials such as concrete and mortar have more or less influence on the working performance of cement-based composite materials such as concrete and mortar due to their physical and chemical properties (different lengths, surface hydrophobicity). The degree of fall and expansion have brought great difficulties to the construction. The result is that the addition of crack resistance and good workability cannot be achieved at the same time. Contents of the invention [0003] The purpose of the present invention is to provide a water-reducing concrete and anti-cracking fiber for mortar that does not affect the working perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B16/02C04B20/10
Inventor 刘国平黄雷
Owner SHANGHAI LUOYANG NEW MATERIAL TECH
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