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High-performance foaming cement and preparation method thereof

A foamed cement, high-performance technology, used in ceramic products, other household appliances, applications, etc., can solve the problem of foam stability, poor size uniformity, product quality that does not meet design requirements, and easy bleeding and segregation of slurry. problems, to ensure thermal insulation performance, facilitate pumping and pouring, increase selectivity and adaptability

Inactive Publication Date: 2011-05-18
辽宁际洲环保节能建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary foamed cement is usually only made of cement, admixtures, foaming agent and water. Its quality is greatly affected by factors such as raw materials, mix ratio, production process, production equipment, and environmental conditions, and there are still certain deficiencies: such as The foam stability and size uniformity are poor, the slurry is easy to bleed and segregate, the foam breaking rate is high during transportation, a large number of bubbles break before the initial setting, and they are easy to collapse after pouring, which increases the open cell rate. Relatively low cement strength or high thermal conductivity affect the energy-saving effect, and the drying shrinkage is large, easy to crack, and the water absorption is large, so the product quality cannot meet the design requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of high-performance foamed cement proportioning by weight:

[0028] Wherein the cement slurry is made according to the following proportions by weight:

[0029] Ordinary Portland cement 100 parts, Paris plaster powder 20 parts,

[0030] 30 parts of fly ash, 25 parts of wollastonite powder,

[0031] 3 parts of vinyl acetate and ethylene copolymer rubber powder, 1.0 parts of hydroxypropyl methylcellulose ether,

[0032] 0.6 parts of amino acid superplasticizer, 0.3 parts of silicone water repellent,

[0033] 70 parts of water;

[0034] The foam is made according to the following proportions by weight:

[0035] 1 part of compound foaming agent, 0.6 part of lauryl betaine

[0036] 40 parts of water.

[0037] Preparation method: 1) Mix the components of the cement slurry evenly in proportion, and stir them well to prepare the cement slurry; 2) Mix the components of the foam evenly in proportion, prepare the foam through a foaming machine, and prefabricate The f...

Embodiment 1

[0038] The main technical index of embodiment 1 is as follows: dry apparent density 520kg / m 3 , thermal conductivity 0.089W / (m·K), compressive strength 1.8MPa, linear shrinkage 0.3%, water absorption 7%.

Embodiment 2

[0040] A kind of high-performance foamed cement proportioning by weight:

[0041] Wherein the cement slurry is made according to the following proportions by weight:

[0042] Ordinary Portland cement 80 parts, high alumina cement 20 parts,

[0043] 10 parts of anhydrite powder, 10 parts of silica fume,

[0044] 10 parts of zeolite powder, 1 part of cold-soluble polyvinyl alcohol powder,

[0045] 0.5 parts of methyl hydroxyethyl cellulose ether, 0.2 parts of polycarboxylate high-performance water reducer,

[0046] 0.1 part of silane-based water repellent, 2 parts of tartaric acid,

[0047] 40 parts of water;

[0048] The foam is made according to the following proportions by weight:

[0049] 1 part of vegetable foaming agent, 0.2 part of coconut oil fatty acid diethanolamide,

[0050]30 parts of water.

[0051] The preparation method is the same as in Example 1, except that the prefabricated foam bulk density is 50 kg / m 3 , The weight ratio of prefabricated cement paste...

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PUM

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Abstract

The invention relates to high-performance foaming cement, which comprises cement slurry and foams, wherein the cement slurry is prepared from the following raw materials in parts by weight: 100 parts of cement, 10-30 parts of gypsum powder, 10-50 parts of active admixtures, 10-40 parts of mineral admixtures, 1-5 parts of re-dispersible gelatine powder, 0.5-1.5 parts of cellulose ether, 0.2-1.0 part of water reducing agent, 0.1-0.5 part of water repellent and 40-90 parts of water; and the foams are prepared from the following components in parts by weight: 1 part of foaming agent, 0.2-0.8 part of foam stabilizer and 30-50 parts of water. A preparation method of the high-performance foaming cement comprises the steps of: (1) preparing the cement slurry; (2) preparing the foams by using a foaming machine; and (3) mixing and uniformly stirring the cement slurry and the foams according to the weight ratio of 1:(0.1-1), and pouring and molding. The high-performance foaming cement disclosed by the invention has high closed porosity and small shrinkage value, and integrates the performances of heat insulation, sound insulation, water repellent, shock resistance, fire protection, durability, low carbon and environmental protection into a whole.

Description

technical field [0001] The invention relates to a high-performance foamed cement, which belongs to building energy-saving materials. Background technique [0002] In recent years, foam plastics have continuously caused serious fires in building insulation construction, causing serious losses, and have attracted the attention of relevant departments. Although inorganic thermal insulation materials still have the disadvantages of higher density and poorer thermal insulation than organic foam materials, from the perspective of fire prevention, it has become the current development trend to replace organic foam materials with inorganic thermal insulation materials. Among the inorganic non-combustible materials, the price of foam glass and foam ceramics is relatively high; although the price of fiber insulation materials such as rock wool and mineral wool is slightly lower, they are harmful to human body during production and use; the water absorption rate of expanded perlite and...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/14
Inventor 李季王全杨勇
Owner 辽宁际洲环保节能建材有限公司
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