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Lightweight high-performance foam concrete and preparation method thereof

A foam concrete, high-performance technology, applied in ceramic products, climate sustainability, and other household appliances, etc., can solve the problems of low strength of foam concrete, restrictions on popularization and application, and large drying shrinkage, etc., to reduce the heat of hydration, Effects of improving strength and volume stability, and improving compactness

Active Publication Date: 2014-10-22
GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, foam concrete generally has problems such as low strength, large drying shrinkage, high water absorption, and poor durability, which seriously restrict its promotion and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 60 parts of ordinary Portland cement, 20 parts of slag, 15 parts of grade II fly ash, 5 parts of anhydrite, 30 parts of heavy calcium powder, 40 parts of quartz sand, 1.5 parts of sodium stearate, 1 part of calcium stearate, 0.4 part of hydroxypropyl methylcellulose ether, 1.0 part of polycarboxylate water reducer, 0.5 part of lithium carbonate, 0.2 part of tartaric acid, 0.1 part of polypropylene fiber, 35 parts of tap water, and 13 parts of foam with a density of 50g / L.

[0033] Preparation:

[0034] 1) Weigh the components according to the mixing ratio;

[0035] 2) Pour the cement, slag, fly ash, gypsum, fine aggregate, fiber and other dry materials into the mixer and stir well;

[0036] 3) Add water and admixtures to the dry material and stir evenly to make cement slurry;

[0037] 4) Mix the foaming agent and water in a ratio of 1:40~60 and add it to the foaming machine, control the foaming pressure in the range of 0.5MPa~1.0MPa, and the length of the foaming cyli...

Embodiment 2

[0041] 50 parts of ordinary Portland cement, 20 parts of slag, 20 parts of grade II fly ash, 10 parts of dihydrate gypsum, 20 parts of heavy calcium powder, 50 parts of quartz sand, 1.2 parts of polyacrylamide, 0.8 parts of silane-based water repellent , 0.6 part of hydroxyethyl methyl cellulose ether, 1.0 part of polycarboxylate water reducing agent, 1 part of anhydrous sodium sulfate, 0.3 part of sodium gluconate, 0.1 part of polypropylene fiber, 38 parts of tap water, density 40g / L foam 10 servings.

[0042] The preparation method is the same as in Example 1.

[0043] The dry bulk density of the obtained lightweight high-performance foam concrete is 550kg / m 3 , 28 days strength 4.2Mpa, thermal conductivity 0.085w / (m K), water absorption rate 4.5%, linear shrinkage rate 0.25%.

Embodiment 3

[0045] 55 parts of ordinary Portland cement, 25 parts of slag, 15 parts of Class I fly ash, 5 parts of dihydrate gypsum, 25 parts of heavy calcium powder, 45 parts of quartz sand, 1.5 parts of sodium dodecylbenzenesulfonate, organic silicon 1 part of water-repellent agent, 0.5 part of hydroxypropyl methylcellulose ether, 1.0 part of polycarboxylate superplasticizer, 1.5 parts of sodium aluminate, 0.3 part of citric acid, 0.1 part of polypropylene fiber, 36 parts of tap water, density 60g / L foam 15 parts.

[0046] The preparation method is the same as in Example 1.

[0047] The dry bulk density of the resulting lightweight high-performance foam concrete is 530kg / m 3 , 28-day strength 4.0Mpa, thermal conductivity 0.080w / (m·K), water absorption 4.7%, linear shrinkage 0.27%.

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Abstract

The invention discloses a lightweight high-performance foam concrete, which is composed of the following components in parts by weight: 50 to 60 parts of cement, 20 to 35 parts of mineral slag, 15 to 20 parts of fly ash, 5 to 10 parts of gypsum, 60 to 80 parts of fine aggregate, 2.7 to 7.3 parts of additive, 0.1 to 0.2 part of fiber, 32 to 45 parts of water, and 5 to 25 parts of foam. The invention also discloses a preparation method of the foam concrete. The foam concrete has the advantages of small volume-weight, high strength, low water absorption, and small contraction rate, and has the waterproof and anti-cracking functions at the same time.

Description

technical field [0001] The invention relates to a lightweight energy-saving building material and a preparation method thereof, in particular to a lightweight high-performance foam concrete and a preparation method thereof. Background technique [0002] In recent years, with the drive of building energy-saving policies, building energy-saving technologies and energy-saving materials have developed rapidly. In order to meet the requirements of building energy conservation and environmental protection, the current wall insulation materials produced with organic polymers as the main raw materials are not suitable for fire protection and environmental protection requirements, and are gradually replaced by inorganic thermal insulation materials. Foamed concrete has the advantages of light weight, heat preservation, heat insulation, sound insulation, non-combustibility, earthquake resistance and waste utilization. It can well meet the requirements of building energy saving and bui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/02C04B18/30C04B22/14
CPCY02W30/91
Inventor 王新祥李建新王元光陈培鑫陈耿张永健郑靓
Owner GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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