Preparation method of large-mixing-amount fly ash non-autoclaved ultra-light foamed concrete

A foamed concrete and fly ash technology, applied in ceramic products, sustainable waste treatment, solid waste management, etc., can solve the problems of low density, reduce the cement consumption of foamed concrete products, easy cracking and water absorption, and achieve high yield , Short demoulding time, good thermal insulation effect

Active Publication Date: 2014-01-22
BEIJING BUILDING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing large-volume fly ash-free steam-cured ultra-light foamed concrete, which can prepare foamed concrete with low densi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The specific embodiment that realizes the preparation method of a large amount of fly ash of the present invention to avoid steam curing ultra-light foam concrete is:

[0046] 1. First, select raw materials:

[0047] Cement: R-type general portland cement with strength grade equal to 42.5;

[0048] Fly ash: the national standard grade is II;

[0049] Attapulgite clay: 85% purity, 200 mesh particle size;

[0050] Chemical foaming agent: hydrogen peroxide solution with a content of 27.5%;

[0051] Foam stabilizer: triethanolamine with a purity of 95%;

[0052] Fiber: 19mm polypropylene fiber;

[0053] Waterproofing agent: zinc stearate;

[0054] Early strength agent: lithium carbonate;

[0055] Water reducer: high efficiency polycarboxylate water reducer;

[0056] Expansion agent: low-alkali concrete expansion agent;

[0057] quicklime;

[0058] water.

[0059] 2. After the raw materials are selected, the raw materials of the foam concrete are prepared according...

Embodiment 2

[0081] The specific embodiment that realizes the preparation method of a large amount of fly ash of the present invention to avoid steam curing ultra-light foam concrete is:

[0082] 1. First, select raw materials:

[0083] Cement: rapid hardening iron-aluminate cement with strength grade equal to 42.5;

[0084] Fly ash: the national standard grade is II;

[0085] Silica fume: SiO 2 Content 80%;

[0086] Attapulgite clay: purity 87%, particle size 200 mesh;

[0087] Chemical foaming agent: hydrogen peroxide solution with a content of 27.5%;

[0088] Foam stabilizer: cellulose ether with a viscosity of 120,000;

[0089] Waterproofing agent: a mixture of calcium stearate and zinc stearate;

[0090] Enhancer: redispersible latex powder;

[0091] Early strength agent: sodium sulfate;

[0092] Water reducer: high efficiency polycarboxylate water reducer;

[0093] Expansion agent: low-alkali concrete expansion agent;

[0094] water.

[0095] 2. After the raw materials are...

Embodiment 3

[0119] The specific embodiment that realizes the preparation method of a large amount of fly ash of the present invention to avoid steam curing ultra-light foam concrete is:

[0120] 1. First, select raw materials:

[0121] Cement: rapid hardening sulfoaluminate cement with strength grade equal to 42.5;

[0122] Fly ash: the national standard grade is II;

[0123] Silica fume: SiO 2 Content 80%;

[0124] Attapulgite clay: purity 87%, particle size 200 mesh;

[0125] Chemical foaming agent: hydrogen peroxide solution with a content of 27.5%;

[0126] Foam stabilizer: cellulose ether with a viscosity of 120,000;

[0127] Fiber: a mixture of 19mm polypropylene fiber and sepiolite wool;

[0128] Waterproofing agent: a mixture of calcium stearate and zinc stearate;

[0129] Enhancer: redispersible latex powder;

[0130] Early strength agent: water glass;

[0131] Water reducer: high efficiency polycarboxylate water reducer;

[0132] Expansion agent: low-alkali concrete ex...

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Abstract

The invention provides a preparation method of large-mixing-amount fly ash non-autoclaved ultra-light foamed concrete. The preparation method comprises the steps of preparing the following raw materials in percentage by weight: 25-35% of cement, 25-47% of fly ash, 0-5% of silica fume, 0-2% of attapulgite clay, 1-5% of a chemical foaming agent, 0.03-2% of a foam stabilizer, 0-4% of fibers, 0.5-3% of a waterproof agent, 0-2% of a reinforcing agent, 0-4% of an accelerator, 0.1-0.4% of a water reducing agent, 0.1-4% of an expansion agent, 0-3% of quicklime and 22-30% of water, and then mixing, stirring and foaming the raw materials. The main properties of the foamed concrete prepared by the preparation method are superior to those of commonly used foamed concrete, the apparent density of the foamed concrete is 160-280kg/m<3>, the thermal conductivity is lower than 0.06W/(m.K), and the specific absorption of volume is not more than 10%; besides, the ratio of fly ash doped in the foamed concrete reaches 47%, the preparation method is good in process stability and high in finished product ratio, and the foamed concrete is suitable for large-scale production and can be used for outer wall external insulation works, roof insulation works, floor heating engineering, energy-saving composite materials and the like.

Description

technical field [0001] The invention relates to a preparation method of foam concrete, in particular to a preparation method of large-volume fly ash-free steam-cured ultra-light foam concrete. Background technique [0002] Foamed concrete is made by adding chemical foaming agent or physical foaming agent to the slurry made of cementitious materials, admixtures, admixtures and water after foaming, mixing, pouring and natural curing A light-weight thermal insulation material, because it contains a large number of evenly distributed closed pores, it has light weight, moisture-proof, fire-proof, sound insulation and good thermal insulation functions. The main performance of the commonly used foam concrete is that the apparent density is 300kg / m 3 ~1200kg / m 3 , the thermal conductivity is greater than 0.085W / (m·K), and the volume water absorption is greater than 30%. The main application fields include: lightweight concrete product manufacturing, composite wall thermal insulati...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/06C04B38/02C04B18/08
CPCY02W30/91
Inventor 罗淑湘邱军付孙桂芳
Owner BEIJING BUILDING TECH DEV
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