Light high-crack-resistance cement concrete

A technology of cement concrete and high crack resistance, applied in the field of building materials, can solve the problems of high density and increase the investment cost of infrastructure construction, and achieve the effect of reducing density, improving earthquake resistance and strong technical advantages.

Inactive Publication Date: 2013-04-10
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the density of the material is still relatively high, and the apparent density of the mixture is 2050kg/m 3 Above, for long-span and

Method used

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  • Light high-crack-resistance cement concrete

Examples

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Effect test

Embodiment 1

[0040] Example 1: Lightweight and highly crack-resistant cement concrete

[0041] Lightweight high-cracking-resistant cement concrete, based on 100 parts by weight, consists of the following raw materials: 40 parts of cementitious material, 14 parts of rubber particles, the particle size is 60 mesh, 0.14 parts of silane coupling agent, 29.06 parts of river sand, water 15.2 parts, 0.2 parts of water reducer, 1.4 parts of polymer fibers, of which:

[0042] The weight ratio of cement, fly ash, silica fume and fine limestone powder in the cementitious material is 75:16:5:4;

[0043] The weight ratio of polyvinyl alcohol fiber and polypropylene fiber in the polymer fiber is 80:20.

[0044] The above-mentioned raw materials are prepared into light-weight high-crack-resistant cement concrete according to the following steps.

[0045] (1) Weigh the cementitious material, rubber particles, silane coupling agent, river sand, water, water reducing agent and polymer fiber according to t...

Embodiment 2

[0048] Example 2: Lightweight and highly crack-resistant cement concrete

[0049] The difference between this embodiment and the above embodiment is only that the ratio of raw materials is different. Based on 100 parts by weight, it is composed of the following raw materials: 35 parts of gelling material, 18 parts of rubber particles, and the particle size is 60 mesh; silane coupling agent 0.27 32.33 parts of river sand; 12.6 parts of water; 0.20 parts of water reducing agent; 1.6 parts of polymer fiber, of which:

[0050] The weight ratio of cement, fly ash, silica fume and fine limestone powder in the cementitious material is 80:10:6:4;

[0051] The weight ratio of polyvinyl alcohol fiber and polypropylene fiber in the polymer fiber is 70:30.

Embodiment 3

[0052] Example 3: Lightweight and highly crack-resistant cement concrete

[0053] The difference between this embodiment and the above embodiment is only the ratio of raw materials, which is composed of the following raw materials in terms of 100 parts by weight: 38 parts of gelling material, 17 parts of rubber particles, the particle size is 80 mesh, and the silane coupling agent is 0.21 27.79 parts of river sand, 15 parts of water, 0.20 parts of water reducer, 1.8 parts of polymer fiber, of which:

[0054] The weight ratio of cement, fly ash, silica fume and fine limestone powder in the cementitious material is 72:15:10:3;

[0055] The weight ratio of polyvinyl alcohol fiber and polypropylene fiber in the polymer fiber is 75:25.

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Abstract

The invention provides light high-crack-resistance cement concrete which comprises the following materials in parts: 20-50 parts of cementing material, 10-20 parts of junked tire rubber grains, 0.08-0.3 parts of silane coupling agent, 20-40 parts of river sand, 10-20 parts of water, 0.3-0.6 parts of water reducing agent and 0.8-2 parts of polymeric fiber, wherein the cementing material comprises the following materials in parts: 60-80 parts of cement, 10-30 parts of fly ash, 5-10 parts of silicon ash and 3-8 parts of fine limestone powder, and the polymeric fiber comprises the following materials in parts: 70-90 parts of polyvinyl alcohol fiber and 10-30 parts of polypropylene fiber. According to the light high-crack-resistance cement concrete, a junked tire is recycled, and the density of the concrete is reduced greatly at the same time; the shock resistance and the deformation resistance of the concrete are improved greatly; an ordinary concrete brittle failure mode is changed; and strain hardening is achieved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a lightweight high-crack-resistant cement concrete. Background technique [0002] Cement concrete is the most used building material in the world today, but its inherent brittleness, poor toughness, and low tensile strength have a great impact on the durability of cement concrete structures. In addition, ordinary cement concrete has a large self-weight, which leads to a large cross-sectional size of the structure and a high reinforcement ratio, which brings great restrictions to the development of modern building structures in the direction of super high-rise and long-span. With the development of the automobile industry, the annual production of waste tires in my country is about 200 million, which brings serious black pollution to the social environment. Landfilling, stacking or incineration of them will cause secondary pollution. If the waste tires are ground into rubber par...

Claims

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Application Information

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IPC IPC(8): C04B28/18C04B18/22C04B16/06C04B24/40C04B111/40
CPCY02W30/91
Inventor 何锐李永鹏嵇绍华陈拴发李祖仲刘状壮朱林志
Owner CHANGAN UNIV
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