Reinforced cement foaming board and preparation method thereof

Abstract

The invention relates to a reinforced cement foaming board and a preparation method thereof. The reinforced cement foaming board comprises the following components in percentage by weight: 27.00-35.50% of water, 28.0-61.0% of Portland cement, 0-32.70% of coal ash at grade I or a mixture of coal ash and recycled filler, 0-2.00% of wollastonite powder, 0.10-0.30% of fiber, 0.37-0.65% of ammonium stearate, 1.00-2.00% of a mixture of 10 parts of calcium sulphate and 1 part of calcium formate, 0.10-0.20% of naphthalenesulfonate formaldehyde condensation compound, 0.90-1.20% of hydrogen peroxide and reinforcement net. The reinforced cement foaming board provided by the invention has the advantages of low apparent density, low heat conductivity coefficient, good noise reduction effect, high strength, no crack and shock resistance.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cement foam board and a preparation method thereof. Background technique [0002] Ordinary Portland cement foam board meets the characteristics of light weight, thermal insulation, sound insulation and noise reduction, high strength, energy saving and environmental protection, safety, and durability. application. Existing similar technology such as publication number is CN101182175A "coal gangue-fly ash foam concrete" patent, the disclosed components and proportions are: cement: fly ash: coal gangue: lime: gypsum: filler: weight ratio of foaming agent 20-30%: 6.4-29.4%: 0.6-63.6%: 5-30%: 2-9%: 0-30%: 0.5-2.5%. [0003] Another example is the patent of CN101172881A "a foam concrete and its preparation method" with the publication number, the disclosed components and weight percentages are: the dry material is composed of cement, fly ash and quicklime, and the percen...

AI Technical Summary

Problems solved by technology

[0004] The existing foamed concrete or foamed cement board has the following performance disadvantages and limitations in application range: (1) It is made by physical foaming process, the density of the foamed board is relatively high, and the thermal conductivity is relatively high; the common apparent density is 300~ 1200kg / m3, its thermal conductivity is between 0.080~0.300W / (m·k); Too much water has entered, resulting in low strength of the foamed cement itself or unsatisfactory surface flatness during roll forming; (3) Foamed cement boards are mainly used for self-insulation of walls, internal and external partition walls of frame structures, floors and roofs In thermal insulation, fire prevention and sound insulation of interior walls, due to its heavy weight, high thermal conductivity and limited sound insulation effect, the application range of materials in the fields of exterior wall insulation and sound insulation and noise reduction is limited; (4) Existing applications for exterior walls Most of the foamed cement boards for thermal insulation are small in size, and they are easily damaged, broken, and cracked during transportation and use; (5) All or part of the rapid-hardening sulphoaluminate cement is added for foaming, and there is a phenomenon of later strength shrinkage, which affects the project. quality

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