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Fiber concrete

A fiber-reinforced concrete and basalt fiber technology, applied in the field of fiber-reinforced concrete, can solve problems such as complex crack control in concrete engineering, achieve the effects of reducing total void ratio, reducing bleeding rate, and improving impermeability

Inactive Publication Date: 2014-09-10
HUNAN CONSTR ENG GRP COR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many reasons for cracks in concrete engineering, involving various links such as material mix ratio, structural design, construction and post-maintenance, and these factors interact and interact with each other, making the crack control of concrete engineering very complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The fiber concrete includes the following components by weight:

[0037] 175kg of water; 340 kg of P1O4215 silicate; 64 kg of grade II finely ground fly ash; 16 kg of silica fume; 705kg of medium sand; 1059kg of gravel or pebbles; Silicon fiber cracking reinforcement 32 kg.

[0038] Performance analysis of the fiber concrete:

[0039] (1) Influence on the physical properties of concrete

[0040] The evenly distributed fibers present a three-dimensional network structure in the concrete, which plays a role in supporting the aggregate, inhibits the bleeding and segregation of the fresh concrete, and thus improves the workability of the concrete mixture. Adding high performance with low mixing ratio to the concrete, compared with the same strength concrete without fiber, the initial setting time is 1~1.5h earlier, and the final setting time is also slightly earlier. The ultimate tensile rate of concrete is quite low, generally only 0.01% to 0.20%, while the ultimate t...

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Abstract

The invention discloses fiber concrete comprising the following components in parts by weight: 170-180 parts of water, 335-345 parts of cement, 60-70 parts of coal ash, 13-19 parts of silicon ash, 1755-1775 parts of aggregates, 2.8-3.5 parts of basalt fiber, 3-5 parts of polycarboxylate superplasticizer and 30-34 parts of light silica fiber anti-crack reinforcer. Basalt fiber is not only good in stability, but also has various excellent performances such as electric insulation property, corrosion resistance, combustion resistance, high temperature resistance and the like. Due to the doping of the light silica fiber anti-crack reinforcer, the separation tendency of the concrete can be effectively avoided and inhibited, and cracks generated after the concrete is poured can be remarkably reduced and even completely eliminated, so that the concrete has the advantages of high compactness, high strength, good durability, low bleeding rate, high anti-crack coefficient and the like. Due to the doping of the coal ash, the silicon ash and the polycarboxylate superplasticizer, the performance of the concrete is improved, the generation of cracks is controlled effectively, and the positive significance for the durability of the concrete is taken.

Description

technical field [0001] The invention relates to a fiber concrete. Background technique [0002] Concrete is the most widely used building material in contemporary construction projects. Concrete engineering technology is always advancing along with the needs of engineering construction and the development of science and technology. It has been widely used in industrial and civil construction, water conservancy, urban construction, agriculture and forestry, transportation and seaport and other projects. At the same time, there will be many new problems in the application of concrete. In recent years, the performance of concrete such as tensile resistance, bending resistance, wrinkle resistance and toughness is relatively poor, and it is prone to cracks and water seepage, which will bring serious problems to engineering construction. huge loss. Therefore, how to improve the tensile strength, bending resistance, wrinkle resistance and toughness of concrete has become the focu...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/02C04B18/08C04B14/38
CPCY02W30/91
Inventor 肖燎张天翔谭丁谢勇彭琳娜张鑫刘维
Owner HUNAN CONSTR ENG GRP COR
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