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Anti-cracking concrete for large-span building and preparation method of anti-cracking concrete

A large-span technology for construction, applied in the field of building materials, can solve problems such as poor durability and short service life, and achieve the effects of preventing fracture, increasing service life, and improving crack resistance

Active Publication Date: 2021-01-22
JIANGSU YUANFENG CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned related technologies, the applicant believes that in the scheme of improving the crack resistance of concrete materials by adding expansion agents, since the expansion agent acts as a compact concrete structure, it cannot perform secondary reinforcement on cracks generated in hot and cold environments. In order to produce cracks after use, resulting in poor durability and short service life, it cannot form a good compensation for the existing crack structure

Method used

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  • Anti-cracking concrete for large-span building and preparation method of anti-cracking concrete
  • Anti-cracking concrete for large-span building and preparation method of anti-cracking concrete
  • Anti-cracking concrete for large-span building and preparation method of anti-cracking concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Take the basalt fiber and rinse it with absolute ethanol 3 times, dry it naturally and soak the basalt fiber in the silane coupling agent KH-560 according to the mass ratio of 1:10, let it stand for 6 hours, and rinse it with deionized water 3 times , Dried naturally, and collected surface treated basalt fiber;

[0034]According to the mass ratio of 1:1:25:0.5, stir and mix the ethyl orthosilicate, deionized water, absolute ethanol and 0.1 mol / L hydrochloric acid, and place the mixture at 55°C for 25 min. Collect the base body fluid. According to the mass ratio of 1:15, stir and mix 5% ammonia water and absolute ethanol to obtain the modified solution. According to the mass ratio of 1:10, add the modified solution dropwise to the base liquid, stir and mix and stir at room temperature 25min, get the coating solution;

[0035]Take calcium sulfate whiskers and cut them into chopped whisker particles with a particle size of 1mm. Add the chopped whisker particles to the coating solution ...

Embodiment 2

[0038]Take the basalt fiber and rinse it with absolute ethanol 4 times, dry it naturally and soak the basalt fiber in the silane coupling agent KH-560 according to the mass ratio of 1:10, let it stand naturally for 7 hours, and rinse it with deionized water 4 times , Dried naturally, and collected surface treated basalt fiber;

[0039]According to the mass ratio of 1:1:27:0.7, stir and mix the ethyl orthosilicate, deionized water, absolute ethanol and 0.1 mol / L hydrochloric acid and place the mixture at 57°C for 27 min. Collect the base body fluid. According to the mass ratio of 1:15, stir and mix 5% ammonia water and absolute ethanol to obtain the modified solution. According to the mass ratio of 1:10, add the modified solution dropwise to the base liquid, stir and mix and stir at room temperature 27min, get the coating solution;

[0040]Take calcium sulfate whiskers and cut them into chopped whisker particles with a particle size of 1mm. Add the chopped whisker particles to the coating ...

Embodiment 3

[0043]Take the basalt fiber and rinse it with absolute ethanol 5 times, dry it naturally and soak the basalt fiber in the silane coupling agent KH-560 according to the mass ratio of 1:10, let it stand for 8 hours, and rinse it with deionized water 5 times , Dried naturally, and collected surface treated basalt fiber;

[0044]According to the mass ratio of 1:2:30:1.0, stir and mix the ethyl orthosilicate, deionized water, absolute ethanol and 0.1 mol / L hydrochloric acid and place them at 60°C for 30 minutes to keep the temperature for reaction. Collect the base fluid, and then According to the mass ratio of 1:15, stir and mix 5% ammonia water and absolute ethanol to obtain the modified solution. According to the mass ratio of 1:10, add the modified solution dropwise to the base liquid, stir and mix and stir at room temperature 30min, get the coating solution;

[0045]Take calcium sulfate whiskers and cut them into chopped whisker particles with a particle size of 2mm. Add the chopped whisk...

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Abstract

The invention relates to the field of hard coatings, and particularly discloses anti-cracking concrete for a large-span building and a preparation method of the anti-cracking concrete. The anti-crackconcrete for the large-span building is prepared from the following components in parts by weight: 60 to 80 parts of cement, 30 to 40 parts of fine aggregate, 10 to 20 parts of coarse aggregate, 10 to15 parts of anti-crack connecting fiber, 10 to 15 parts of fly ash, 3 to 5 parts of additive and 60 to 80 parts of water, and the anti-crack connecting fibers are basalt fibers coated with a silicondioxide aerogel film. The preparation method comprises the following steps: putting the cement, the anti-crack connecting fiber, the fine aggregate and the coarse aggregate in the formula into a stirrer according to the components of the formula, stirring and mixing at room temperature, adding the water, the fly ash and the additive into the stirrer, and stirring and mixing to obtain the anti-crack concrete for the large-span building. The concrete provided by the invention has excellent crack resistance. In addition, the preparation method is simple and easy to operate.

Description

Technical field[0001]This application relates to the field of building materials, and more specifically, it relates to a crack-resistant concrete for large-span buildings and a preparation method thereof.Background technique[0002]With the progress of the times, people have higher requirements for the height, beauty and safety of buildings, and higher requirements for the durability and utilization of building materials. As the span and height of buildings increase, the deformation and tensile strength of reinforced concrete structures can no longer meet the structural requirements, and inevitable problems such as concrete cracking frequently occur.[0003]Therefore, for this type of reinforced concrete, the improvement direction is mainly to adjust and improve the crack resistance of the reinforced concrete. For example, the expansion agent is mixed into the concrete, and the ettringite crystals are formed between the expansion agent and the concrete, and the crystal structure is The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/10C04B111/20C04B111/34
CPCC04B28/04C04B20/1066C04B2111/343C04B2111/2015C04B18/08C04B2103/302C04B14/068C04B14/02C04B22/002C04B14/4643C04B14/383C04B20/1014
Inventor 何瑞雯陈永忠张云龙陈聪明陈建华樊晨刘江波
Owner JIANGSU YUANFENG CONSTR
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