Foam concrete block manufactured by chemical foaming and manufacture method thereof

A foamed concrete and chemical foaming technology, used in applications, household appliances, ceramic products, etc., can solve the problems of poor thermal insulation performance, high block density, large air bubbles, etc., and achieve low density, large air bubbles, and low thermal conductivity. Effect

Inactive Publication Date: 2013-09-11
菏泽景行电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The foam concrete introduced in the building materials industry standard "JC/T 1062-2007 Foam Concrete Block" uses physical methods to prepare foam concrete, and the density level is 300kg/m 3 Above, but compared with physical foaming, chemical foaming has large and independent bubbles. The foaming pr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 200kg of ordinary Portland cement, 60kg of fly ash, 20kg of slag micropowder, 10kg of silica fume, 12kg of composite additives composed of calcium stearate, potassium hydroxide, and water, 2.5kg of triethanolamine, 0.05kg of calcium formate, 1.2kg of cellulose acid ether powder polymer, 0.7kg of melamine, 1kg of polypropylene fiber and 115kg of water are mixed together for the first stage of stirring; after the first stage of stirring, it quickly enters the second stage of stirring, and the material after the second stage of stirring is added with a concentration of 27% 12kg of hydrogen peroxide solution is used for three-stage stirring for 7 seconds; the stirred foam concrete slurry is injected into the mold; the foam is left to stand; then natural curing is carried out under the environmental conditions above zero, and the dry apparent density of the blocks produced is 350kg / m3, the compressive strength is above 2.0Mpa, and the thermal conductivity is 0.08w / (m·K...

Embodiment 2

[0030] Weigh 300kg of ordinary Portland cement, 80kg of fly ash, 30kg of slag powder, 15kg of silica fume, 16kg of composite additives composed of stearic acid, sodium carbonate, potassium fluoride, ammonia and water, 8kg of sodium sulfide, and 0.1 kg of lithium carbonate. kg, 0.3kg of wood fiber, 1.2kg of SM superplasticizer, 1.5kg of polypropylene fiber and 138kg of water for first-stage stirring; after the first-stage stirring, it quickly enters the second-stage stirring, and the material after the second-stage stirring is added with a concentration of 33% 18kg of hydrogen peroxide solution is used for three-stage stirring for 7 seconds; the stirred foam concrete slurry is injected into the mold; it is left to foam; and then natural curing is carried out under the environmental conditions above zero, and the dry apparent density of the produced blocks is 510kg / m3, the compressive strength is above 4.0Mpa, and the thermal conductivity is 0.1w / (m·K).

Embodiment 3

[0032] Weigh 400kg of ordinary Portland cement, 110kg of fly ash, 50kg of slag powder, 20kg of silica fume, 20kg of composite additives composed of calcium stearate, sodium carbonate, potassium fluoride and water, 20kg of calcium chloride, and 0.07 kg of zinc sulfate. kg, cellulose acid ether powder polymer 2kg, polycarboxylate 1.0kg, polypropylene fiber 2kg and water 194kg carry out primary stirring together; Enter secondary stirring rapidly after primary stirring, the material adding concentration after secondary stirring is 20kg of 27% hydrogen peroxide solution was stirred in three stages for 7 seconds; the stirred foam concrete slurry was injected into the mould; it was left to foam; The density is 670kg / m3, the compressive strength is above 6.0Mpa, and the thermal conductivity is 0.14w / (m·K).

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Abstract

The invention belongs to the field of application of building materials, and particularly discloses a foam concrete block manufactured by chemical foaming and a manufacture method thereof. The manufacture method comprises the following steps of: with ordinary portland cement, coal ash, superfine slag powder, silica fume, a composite additive, an accelerator, a reinforcing agent, a stabilizer, a water reducing agent, polypropylene fibers, a foaming agent and water serving as the raw materials; mixing all the raw materials, except the foaming agent; stirring at the first grade and the second grade to obtain uniform size; adding the foaming agent to the uniform size and stirring at the third grade quickly; quickly placing the material subjected to third grade stirring into a die; and naturally curing under a condition that the outside temperature is not less than zero. The foam concrete block is free of shrinkage and sinking, collapsing and deforming in the whole process from pouring to solidifying, can realize low density and low heat conductivity coefficient, is large, uniform and relatively independent in bubble, and has a good heat insulating effect.

Description

(1) Technical field [0001] The invention belongs to the application field of building materials, in particular to a foamed concrete block made by chemical foaming and a manufacturing method thereof. (2) Background technology [0002] Foamed concrete, also known as foamed cement, lightweight concrete, etc., is a new type of building energy-saving material that is waste-friendly, environmentally friendly, energy-saving, cheap and non-combustible. Its density generally fluctuates between 300-1030kg / m 3 Among them, because the foamed concrete contains a large number of closed small pores, it has good thermal insulation performance, which is not available in ordinary concrete. Usually the density level is 330kg / m 3 The thermal conductivity of foamed concrete in the above range is between 0.08-0.27w / (m·K), and the thermal resistance is about 10-20 times that of ordinary concrete. The use of foam concrete as building wall and roof materials has good energy-saving effect. [...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/04
Inventor 万鲁彦李玉霞万飞
Owner 菏泽景行电子材料有限公司
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