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A kind of high-strength crack-resistant foam concrete and its preparation method

A technology of foam concrete and crack resistance, which is applied in the field of foam concrete to achieve the effects of reducing bulk density, broadening application fields, and excellent crack resistance

Active Publication Date: 2021-09-28
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foamed concrete has high strength and can effectively inhibit the generation and development of cracks, and can effectively overcome the problems of insufficient strength and severe shrinkage cracking commonly found in existing foamed concrete, and the raw materials involved are widely sourced, environmentally friendly, and conducive to broadening Application range of foam concrete

Method used

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  • A kind of high-strength crack-resistant foam concrete and its preparation method
  • A kind of high-strength crack-resistant foam concrete and its preparation method
  • A kind of high-strength crack-resistant foam concrete and its preparation method

Examples

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Effect test

Embodiment 1

[0038] A high-strength crack-resistant foam concrete, according to the target bulk density of 800kg / m 3 The components and their mass percentages are designed as follows: cement 48.19%, fly ash 10.58%, water 18.81%, vitrified microbeads 17.63%, foam 3.67%, expansion agent 0.12%, coagulant 0.18%, water reducing Agent 0.47%, cellulose ether (hydroxymethyl cellulose ether) 0.06%, composite fiber 0.29% (6mm alkali-resistant glass fiber and 12mm polypropylene fiber are mixed in a mass ratio of 1:2); its preparation method Including the following steps:

[0039] 1) Weigh each raw material according to the above ratio; stir the weighed cement, fly ash, vitrified microbeads, expansion agent, coagulant, and cellulose ether evenly, then add water and water reducer and stir evenly, and finally Sprinkle the composite fiber evenly into the mixing pot (first add the shorter glass fiber into the slurry and then add the longer polypropylene fiber and stir evenly), then add the foam produced ...

Embodiment 2

[0043] A high-strength crack-resistant foam concrete, according to the target bulk density of 750kg / m 3 The components and their mass percentages are designed as follows: cement 50.60%, fly ash 10.36%, water 18.29%, vitrified microbeads 15.25%, foam 3.98%, expansion agent 0.18%, coagulant 0.24%, water reducing Agent 0.61%, cellulose ether 0.12%, composite fiber 0.37% (the alkali-resistant glass fiber of 6mm and the polypropylene fiber of 12mm are mixed by the mass ratio of 1:2); Its preparation method comprises the following steps:

[0044] 1) Weigh each raw material according to the above ratio; stir the weighed cement, fly ash, vitrified microbeads, expansion agent, coagulant, and cellulose ether evenly, then add water and water reducer and stir evenly, and finally Sprinkle the composite fiber evenly into the mixing pot (first add the short alkali-resistant glass fiber into the slurry and then add the longer polypropylene fiber and stir evenly), then add the foam produced by...

Embodiment 3

[0048] A high-strength crack-resistant foam concrete, according to the target bulk density of 850kg / m 3 The components and their mass percentages are designed as follows: cement 45.07%, fly ash 11.28%, water 19.72%, vitrified microbeads 19.71%, foam 3.42%, expansion agent 0.06%, coagulant 0.11%, water reducing 0.34% of cellulose ether, 0.06% of cellulose ether (hydroxymethyl cellulose), 0.23% of composite fiber (6mm alkali-resistant glass fiber and 12mm polypropylene fiber are mixed in a mass ratio of 1:2); its preparation method includes Follow the steps below:

[0049] 1) Weigh each raw material according to the above ratio; stir the weighed cement, fly ash, vitrified microbeads, expansion agent, coagulant, and cellulose ether evenly, then add water and water reducer and stir evenly, and finally Sprinkle the composite fiber evenly into the mixing pot (first add the short alkali-resistant glass fiber into the slurry and then add the longer polypropylene fiber and stir evenly...

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Abstract

The invention discloses a high-strength crack-resistance foam concrete. The components and their mass percentages include: 45-51% of cement, 8-14% of fly ash, 16-22% of water, and 15-21% of vitrified microbeads. %, foam 1-5%, expansion agent 0.1-1%, coagulation accelerator 0.1-1%, water reducing agent 0.1-1%, cellulose ether 0.01-1%, composite fiber 0.1-1%. The foamed concrete prepared by the invention has high strength and can effectively inhibit the generation and development of cracks, and can effectively overcome the problems of insufficient strength and serious shrinkage cracking commonly existing in existing foamed concrete, and the raw materials involved are wide in source, low in cost, and environmentally friendly. Friendly, it is beneficial to broaden the application range of foam concrete.

Description

technical field [0001] The invention belongs to the technical field of foam concrete, and in particular relates to a high-strength crack-resistant foam concrete and a preparation method thereof. Background technique [0002] Foam concrete is a new type of building material that introduces foam into concrete to reduce the weight of concrete and save materials. Especially, foam concrete has the advantages of sound insulation, fire prevention and heat preservation, which makes it favored by the building materials industry. However, because the foam concrete contains a large amount of foam, its strength is generally not high due to the large number of internal pores; and the internal foam contains a large amount of water, and the evaporation of water will cause shrinkage stress inside the concrete, which makes the foam concrete prone to cracks after large-scale pouring . The two problems of low strength and easy cracking greatly limit the large-scale promotion of foam concrete....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/10C04B28/04
CPCC04B28/04C04B2111/40C04B2201/50C04B18/08C04B14/24C04B14/10C04B14/304C04B14/28C04B22/124C04B24/383C04B2103/302C04B16/0633C04B14/42C04B38/106
Inventor 黄绍龙丁平祥黄修林唐涛张群峰储昭胜程凯
Owner HUBEI UNIV
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