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Crack-resistant concrete for large-span buildings and preparation method thereof

A constructional, large-span technology, applied in the field of building materials, can solve the problems of poor durability and short service life, and achieve the effect of preventing fracture, improving service life and improving crack resistance.

Active Publication Date: 2021-12-24
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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  • Crack-resistant concrete for large-span buildings and preparation method thereof
  • Crack-resistant concrete for large-span buildings and preparation method thereof
  • Crack-resistant concrete for large-span buildings and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take the basalt fiber and wash it with absolute ethanol for 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 naturally for 6 hours, and rinse it with deionized water for 3 times , dry naturally, and collect surface-treated basalt fibers;

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

[0035]Take calcium sulfate whiskers and cut them into short-cut whisker particles with a particle size of 1mm. Add t...

Embodiment 2

[0038] Take the basalt fiber and rinse it with absolute ethanol for 4 times, dry it naturally and soak the basalt fiber into 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 for 4 times , dry naturally, and collect surface-treated basalt fibers;

[0039] According to the mass ratio of 1:1:27:0.7, stir and mix ethyl orthosilicate, deionized water, absolute ethanol and 0.1mol / L hydrochloric acid and place it at 57°C for 27 minutes, collect the base liquid, and then According to the mass ratio of 1:15, stir and mix the mass fraction of 5% ammonia water and absolute ethanol to obtain the modified liquid, and according to the mass ratio of 1:10, add the modified liquid dropwise to the base liquid, stir and mix, and stir at room temperature 27min, the coating solution was obtained;

[0040] Take calcium sulfate whiskers and cut them into short-cut whisker particles with a particle size of 1 m...

Embodiment 3

[0043] Take the basalt fiber and wash it with absolute ethanol for 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 naturally, and rinse it with deionized water for 5 times , dry naturally, and collect surface-treated basalt fibers;

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

[0045] Take calcium sulfate whiskers and cut them into short-cut whisker particles with a particle size of 2mm. ...

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Abstract

The application relates to the field of hard coatings, and specifically discloses a crack-resistant concrete for large-span buildings and a preparation method thereof. The crack-resistant concrete for large-span buildings includes the following components in parts by weight: 60-80 parts of cement, 30-40 parts of fine aggregate, 10-20 parts of coarse aggregate, 10-15 parts of crack-resistant connecting fiber, 10- 15 parts of fly ash, 3-5 parts of admixture, 60-80 parts of water; the crack-resistant connecting fiber is basalt fiber coated with silica airgel film. The preparation method is as follows: according to the formula components, put the cement, anti-crack connecting fiber, fine aggregate and coarse aggregate in the formula first in the mixer, stir and mix at room temperature, and then add water, fly ash and additives Add it into a mixer, stir and mix to prepare the crack-resistant concrete for large-span buildings. The concrete of the present application has excellent crack resistance. In addition, the preparation method of the present application is simple and easy to operate.

Description

technical field [0001] The application relates to the field of building materials, 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. With the increase of the span and height of the building, the deformation and tensile strength of the reinforced concrete structure 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 main improvement direction is to adjust and improve the crack resistance of reinforced concrete. For example, the expansion agent is mixed into the concrete, and ettringite crystals are formed between the expansion agent and the concrete. The coordinat...

Claims

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Application Information

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Patent Type & Authority Patents(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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