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Preparation of Foam Concrete by a Chemical Foaming Method

A foam concrete and foaming agent technology, applied in the field of building materials and construction, can solve problems such as complex process, low strength, and difficult construction, and achieve the effect of simple production process and high strength

Inactive Publication Date: 2011-11-30
北京翰高兄弟科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: complex equipment, difficult construction on the roof of high-rise buildings, and uneven foam pore size, low strength, complicated process, high one-time investment, and not conducive to large-scale promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take the raw material according to the following parts by weight:

[0014] Portland cement 80, heavy calcium 1.5, red mud 1.5, fly ash 20, hydrogen peroxide 5.0, silane-based water repellent 1.2, polypropylene fiber 0.8, baking soda 1.5, water 55; the dry density obtained by chemical foaming method is 100~150kg / m 3 foam concrete.

Embodiment 2

[0016] Take the raw material according to the following parts by weight:

[0017] Sulphoaluminate cement 50, micro silica fume 2.5, expanded perlite 2.5, fly ash 30, hydrogen peroxide 6.0, silicone resin 1.0, polypropylene fiber 0.6, sodium carbonate 1.0, water 35; dry density obtained by chemical foaming method 150~280kg / m 3 foam concrete.

Embodiment 3

[0019] Take the raw material according to the following parts by weight:

[0020] Portland cement 40, sulphoaluminate cement 40, silica fume 2.0, lime 2.0, fly ash 20, hydrogen peroxide 5.0, silicon acrylic emulsion 1.0, polypropylene fiber 1.0, baking soda 0.5, sodium carbonate 0.5, water 35; The dry density obtained by chemical foaming method is 280-400kg / m 3 foam concrete.

[0021] According to the standard JC / T 1062-2007 "foam concrete block", the foam concrete prepared in the above examples was tested, and the dry apparent density of the foam concrete was measured to be 130-400kg / m 3 , the compressive strength is 0.4-1.0MPa, the thermal conductivity is 0.045-0.08w / (m k), the volume water absorption is ≤5%, and the brittleness is improved; according to the standard GB / T 5464-1999 "Test method for non-combustibility of building materials " and GB 8624-1997 "Classification of Combustion Performance of Building Materials", the foamed concrete prepared by the present inventi...

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Abstract

The invention discloses a chemical foaming method for preparing foamed concrete, which belongs to the technical field of building thermal insulation materials. The raw material composition and weight percentage of foam concrete are: cement 20-80wt%, ore powder 1-5wt%, fly ash 5-30wt%, foaming agent 1-6wt%, water 10-70wt%, modifier 0.2- 1.5wt%, fiber 0.2-1wt%, auxiliary material 1-8wt%. Its preparation method is to pour water into the container first, then put a certain amount of cement, ore powder, fly ash, and additives into the water, stir evenly with a stirrer, pour in foaming agent to mix and stir, and then quickly transfer After leaving the mixer, the foaming is completed within 30 minutes, and the strength is reached after 24 hours, and the formed foam concrete is obtained after 28 days of curing. The foamed concrete obtained by the invention has good water resistance, low thermal conductivity, low dry density, high strength, strong durability, simple formula and convenient construction; it can partially replace polystyrene board, extruded plastic board and rubber powder in the external wall insulation system Polystyrene particles and other organic insulation materials.

Description

technical field [0001] The invention mainly relates to a chemical foaming method for preparing foamed concrete, in particular lightweight and high-strength foamed concrete, and belongs to the technical field of building materials and construction. Background technique [0002] At present, foamed concrete with light weight, heat preservation, heat insulation, sound insulation, fire resistance, durability and water resistance has been widely used in building construction. [0003] Nowadays, the most widely used method is the physical foaming method to prepare foamed concrete. Specifically: the foaming agent aqueous solution is prepared into a foam, and then the foam is added to siliceous materials, calcium materials (cement, lime), water and various admixtures (usually polycarboxylate water reducer, early strength agent) and other slurry, after mixing, pouring and curing, it is a kind of porous cast-in-place concrete that is suitable for indoor and outdoor cushions, roof insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/00C04B28/04C04B28/36
Inventor 吴飞徐春利房墉房振
Owner 北京翰高兄弟科技发展有限公司
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