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Composite high-strength concrete

A concrete and high-strength technology, applied in the field of concrete, can solve problems such as poor durability, low compressive strength of high-strength concrete, and easy cracking, and achieve the effects of improving compactness, enhancing thermal insulation and heat resistance, and reducing moisture

Active Publication Date: 2022-04-15
深圳市深建混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problems of low compressive strength, easy cracking and poor durability of high-strength concrete, the first purpose of this application is to provide a composite high-strength concrete

Method used

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  • Composite high-strength concrete
  • Composite high-strength concrete

Examples

Experimental program
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Effect test

preparation example 1

[0041] (1) Soak 100 parts by weight of carbon fibers in absolute ethanol for 45 minutes, then ultrasonically clean them for 35 minutes, and then dry them in vacuum at 70°C for 4 hours;

[0042] (2) Mix the dried carbon fiber in step (1) with a hydrofluoric acid solution with a mass concentration of 35%, the volume ratio of the carbon fiber to the hydrofluoric acid solution is 1:2, heat and react at 70°C for 8 hours, take it out and use Wash with deionized water until neutral, and then vacuum-dry at a temperature of 70°C for 7 hours;

[0043] (3) Mix the carbon fibers dried in step (2) with the chitosan mixture at a weight ratio of 1:3, then wash with ethanol and deionized water, and dry in vacuum at 60°C for 5 hours to obtain modified carbon fibers.

preparation example 2

[0045] (1) Soak 100 parts by weight of carbon fiber in absolute ethanol for 30 minutes, then ultrasonically clean it for 45 minutes, and then vacuum dry it at 80°C for 3 hours;

[0046] (2) Mix the dried carbon fiber in step (1) with a hydrofluoric acid solution with a mass concentration of 25%, the volume ratio of the carbon fiber to the hydrofluoric acid solution is 1:2, heat and react at 60°C for 5 hours, take it out and use Wash with deionized water until neutral, then vacuum dry at 80°C for 6 hours;

[0047] (3) Mix the carbon fibers dried in step (2) with the chitosan mixture at a weight ratio of 1:5, then wash with ethanol and deionized water, and dry in vacuum at 70°C for 3 hours to obtain modified carbon fibers.

preparation example 3

[0049] (1) Soak 100 parts by weight of carbon fibers in absolute ethanol for 60 minutes, then ultrasonically clean them for 25 minutes, and then dry them in vacuum at 60°C for 5 hours;

[0050] (2) Mix the dried carbon fiber in step (1) with hydrofluoric acid solution with a mass concentration of 25-35%, the volume ratio of carbon fiber to hydrofluoric acid solution is 1:2, heat and react at 60°C for 12 hours, take out Afterwards, it was washed with deionized water to neutrality, and then vacuum-dried at a temperature of 80° C. for 6 hours to obtain modified carbon fibers.

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Abstract

The invention relates to the field of building materials, and particularly discloses composite high-strength concrete and a preparation method thereof.The composite high-strength concrete is prepared from, by weight, 230-280 parts of cement, 200-300 parts of high-strength materials, 20-60 parts of plant ash, 10-15 parts of waste fibers, 10-20 parts of lignin, 5-15 parts of liquid paraffin, 8-30 parts of water glass, 5-12 parts of water reducing agents, 120-210 parts of water and 15-25 parts of molecular sieves; the high-strength material is a mixture of broken bricks, waste concrete blocks and industrial waste residues. The high-strength concrete prepared by the invention has relatively high anti-permeability performance and relatively high compressive strength, so that the high-strength concrete is not easy to crack when being stressed.

Description

technical field [0001] The present application relates to the technical field of concrete, and more specifically relates to a composite high-strength concrete. Background technique [0002] With the vigorous development of my country's construction and transportation, people have higher and higher requirements for structures. Concrete plays an important role in building materials. Among them, because high-strength concrete is much higher than ordinary concrete in terms of strength, and Under the same stress conditions, the deformation is much smaller, and the load-bearing capacity of its structure is significantly improved, so high-strength concrete has more applications in large-scale special and important projects. [0003] High-strength concrete is widely used because of its high compressive strength, small deformation and other excellent properties. However, high-strength concrete has the disadvantages of poor toughness and easy cracking, which makes it easy for harmful s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/02C04B20/04C04B18/02C04B14/08C04B14/38C04B40/00C04B111/20C04B111/34
CPCY02W30/91
Inventor 张应红柏成林
Owner 深圳市深建混凝土有限公司
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