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A kind of lightweight high-performance foam concrete and its preparation method

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: 2016-04-06
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 class 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 parts of hydroxypropyl methylcellulose ether, 1.0 parts of polycarboxylate superplasticizer, 0.5 parts of lithium carbonate, 0.2 parts of tartaric acid, 0.1 parts of polypropylene fiber, 35 parts of tap water, and 13 parts of foam with a density of 50 g / L.

[0033] Preparation:

[0034] 1) Weigh each component according to the mix ratio;

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

[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 into the foaming machine at a ratio of 1:40~60, control the foaming pressure in the range of 0.5MPa~1.0MPa, and the length of the foaming cylinder ...

Embodiment 2

[0041] 50 parts of ordinary portland cement, 20 parts of slag, 20 parts of class 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 parts of hydroxyethyl methyl cellulose ether, 1.0 parts of polycarboxylate superplasticizer, 1 part of anhydrous sodium sulfate, 0.3 parts of sodium gluconate, 0.1 part of polypropylene fiber, 38 parts of tap water, foam with a density of 40g / L 10 servings.

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

[0043] The dry bulk density of the gained lightweight high-performance foamed concrete is 550kg / m 3 , 28-day strength 4.2Mpa, thermal conductivity 0.085w / (m·K), water absorption 4.5%, linear shrinkage 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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PUM

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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, driven by 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 wall insulation materials currently produced with organic polymers as the main raw material are not suitable for fire protection and environmental protection requirements, and are gradually replaced by inorganic heat insulation materials. Foamed concrete has the advantages of light weight, heat preservation, heat insulation, sound insulation, non-combustibility, earthquake resistance, waste utilization, etc. It can well meet the requirements of building energy saving and building sa...

Claims

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Application Information

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Patent Type & Authority Patents(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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