Lightweight air-entrained concrete block and its preparation method
A technology of aerated concrete and blocks, which is applied in the field of building materials, can solve the problems of large drying shrinkage, single source of materials, poor heat insulation, etc., and achieve high compressive strength, increase hydrophobicity, and improve water seepage capacity.
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[0013] A light-weight aerated concrete block, characterized in that it is made of the following raw materials in parts by weight (kg): cement 20, quicklime 15, gypsum 12, fly ash 10, aluminum powder 0.3, polypropylene fiber 10, mineral Oil 8, clay 8, plant ash 35, ammonium persulfate 3, oil foot 10, sodium metasilicate 15, polyvinyl alcohol 3.
[0014] The preparation method of the lightweight aerated concrete block is characterized in that it comprises the following steps:
[0015] (1) Add appropriate amount of water to clay and plant ash, heat to 90-100°C, stir for 5-10 minutes, add oil foot, sodium metasilicate, stir for 25-35 minutes, then add ammonium persulfate, stir for 30-45 minutes Minutes later, add polyvinyl alcohol and gypsum and stir for 20-30 minutes until it becomes mud;
[0016] (2) Add cement to 50-60°C hot water and mix for 5-15 minutes, then add the mud obtained in step (1), quicklime, aluminum powder, fly ash, mineral oil and other materials, and stir for ...
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