High-volume coal ash ceramsite foam concrete and preparation method thereof

A technology of foam concrete and fly ash ceramsite, which is applied in the field of building materials, can solve the problems of large usage, achieve the effects of reducing cement consumption, improving mechanical strength and volume stability, and shortening steam curing time

Active Publication Date: 2015-03-25
中冶武汉冶金建筑研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the technical problems existing in the existing foam concrete, the present invention provides a large-volume fly ash ceramsite foam concrete and a preparation method thereof. production cost, and ensure that the foamed concrete has high mechanical strength and volume stability while being lightweight

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  • High-volume coal ash ceramsite foam concrete and preparation method thereof
  • High-volume coal ash ceramsite foam concrete and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Example 1: A method for preparing large-volume fly ash ceramsite foamed concrete, its raw material composition and mass ratio of each component are arranged as follows, P.O 42.5 ordinary Portland cement: Class II fly ash: ceramsite light aggregate Material: water: polycarboxylate superplasticizer: aluminum carbonate: protein type KC-16 foaming agent: polypropylene fiber with a length of 8 mm = 190:210:300:180:0.9:5:1.7:1.2, the pottery Light-grained aggregates are compounded with large and small particle sizes of ceramsite. The particle size of large particle size ceramsite is 20-28mm, and the particle size of small particle size ceramsite is 8-15mm. The mass ratio of the two is 180:120.

[0029] The concrete molding steps of above-mentioned foamed concrete are as follows:

[0030] (1) Add P.O 42.5 ordinary Portland cement, Class II fly ash, ceramsite light aggregate, aluminum carbonate, and polypropylene fiber with a length of 8 mm to the mixer for pre-mixing, and the...

Embodiment 2

[0037] A preparation method of a large amount of fly ash ceramsite foam concrete, its raw material composition and the mass ratio of each component are arranged as follows, P.O 42.5 ordinary Portland cement: Class II fly ash: ceramsite light aggregate: tap water: Polycarboxylate water reducer: sodium aluminate: rosin-type KC-15 foaming agent: polyethylene fiber with a length of 10mm=215:215:290:170:1.3:13:0.4:1.2. The ceramsite light aggregate is compounded with ceramsites with large and small particle sizes. The particle size of the large particle size ceramsite is 15-20mm, and the particle size of the small particle size ceramsite is 3-10mm. The mass ratio is 200:90.

[0038] The concrete molding steps of above-mentioned foamed concrete are as follows:

[0039] (1) Add P.O 42.5 ordinary Portland cement, Class II fly ash, ceramsite light aggregate, sodium aluminate, and polyethylene fiber with a length of 10 mm into the mixer for pre-mixing, and stir The speed is 17r / min, a...

Embodiment 3

[0046] A method for preparing large-volume fly ash ceramsite foamed concrete, its raw material composition and the mass ratio of each component are as follows, P.O 42.5 ordinary Portland cement: II grade fly ash: S95 grade granulated blast furnace slag powder: pottery Lightweight aggregate: water: polycarboxylate superplasticizer: sodium aluminate: protein foaming agent: polyvinyl alcohol fiber with a length of 6-9mm = 180:220:30:290:170:1.3:13:1.7: 1.2. The ceramsite light aggregate is compounded with ceramsite with large and small particle sizes, the average particle size of large particle size ceramsite is 22-26mm, and the average particle size of small particle size ceramsite is 8-11mm, The mass ratio of the two is 190:100; the water is tap water meeting the water standard for concrete, and the protein foaming agent can be a commercially available common protein foaming agent.

[0047] The concrete molding steps of above-mentioned foamed concrete are as follows:

[0048]...

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Abstract

The invention provides a preparation method of high-volume coal ash ceramsite foam concrete. The preparation method of the ceramsite foam concrete comprises the following steps: putting 38%-50% of a binding material, 29%-40% of ceramsite lightweight aggregates, 0.5%-1.5% of an excitant and 0.12%-0.14% of a fiber into a stirrer, and stirring evenly; simultaneously adding 0.04%-0.20% of a foaming agent and foam which is formed by a part of water in a foaming machine and has the particle sizes of 50-1,000mu m, the residual water and 0.09%-0.15% of a water reducer into the stirrer, and stirring with powder evenly to form slurry; adding the foam into the slurry, stirring evenly, and then pouring into a mold to mold; and demolding to prepare the ceramsite foam concrete of which the density is 300-800kg/m<3>. According to the formula provided by the invention, low-cost coal ashes are taken as a main raw material, and the material cost is reduced; meanwhile, the volume-weight of the concrete is reduced by adding the ceramsite lightweight aggregates with different particle sizes; and the mechanical strength and the stability of the concrete are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a large-volume fly ash ceramsite foam concrete and a preparation method thereof. Background technique [0002] At present, the common wall thermal insulation materials in my country mainly include organic thermal insulation materials and inorganic thermal insulation materials, among which foamed concrete is a typical inorganic thermal insulation material. The main application field of foam concrete is building thermal insulation, accounting for about 80% of its total output. Compared with common organic insulation materials on the market such as polystyrene foam board and phenolic foam board, foam concrete has the advantages of high strength, long service life and good fire resistance. The existing foam concrete itself has the disadvantage of relatively high bulk density. If the bulk density is reduced by increasing the foam content, the foamed concrete pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/00C04B16/06C04B14/02
Inventor 曾明王智周紫晨张冰陈晶
Owner 中冶武汉冶金建筑研究院有限公司
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