Method for making high-strength autoclaved aerated concrete block
A technology of concrete block and autoclaved aeration, applied in the field of building materials, can solve the problems of low overall level and limited wide application, and achieve the effects of reducing drying shrinkage, low product density, and improving strength
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Embodiment 1
[0017] A method for preparing a high-strength autoclaved aerated concrete block, comprising the steps of:
[0018] S1. Stir 80kg of weathered coal, 30kg of diatomite, and 120kg of water evenly, add 100kg of cement, 10kg of sodium silicate and continue stirring for 30 minutes under stirring. The stirring temperature is 35°C, add 6kg of aluminum powder, 1kg of triethylamine, Styrene composite microspheres were stirred for 2 minutes to obtain a premix;
[0019] Polystyrene composite microspheres were prepared by the following process: 20kg of polystyrene emulsion with a solid content of 12wt% and a number-average particle diameter of 150-180nm, 0.2kg of calcium lignosulfonate, and 50kg of water were mixed evenly, and poured under stirring. Add 8 kg of polypyrrole and stir for 4 hours, add 4 kg of 0.1 mol / L potassium persulfate aqueous solution, add 12 kg of 1 mol / L p-toluenesulfonic acid solution under stirring, adjust the temperature to 75 ° C, stir for 25 min, centrifuge, wash,...
Embodiment 2
[0022] A method for preparing a high-strength autoclaved aerated concrete block, comprising the steps of:
[0023] S1. Stir 120kg of weathered coal, 20kg of diatomite, and 240kg of water evenly, add 60kg of cement, 20kg of sodium silicate and continue stirring for 20 minutes under stirring. The stirring temperature is 45°C, add 4kg of aluminum powder, 2kg of triethylamine, Styrene composite microspheres were stirred for 5 minutes to obtain a premix;
[0024] Polystyrene composite microspheres were prepared by the following process: 10 kg of polystyrene emulsion with a solid content of 14 wt % and a number-average particle size of 150-180 nm, 0.1 kg of calcium lignosulfonate, and 70 kg of water were mixed evenly, and poured under stirring. Add 4kg of polypyrrole and stir for 6h, add 2kg of potassium persulfate aqueous solution with a concentration of 0.2mol / L, add 6kg of p-toluenesulfonic acid solution with a concentration of 1.3mol / L under stirring, adjust the temperature to 6...
Embodiment 3
[0027] A method for preparing a high-strength autoclaved aerated concrete block, comprising the steps of:
[0028] S1. Stir 90kg of weathered coal, 28kg of diatomite, and 160kg of water evenly, add 90kg of cement, 12kg of sodium silicate and continue stirring for 28 minutes under stirring. The stirring temperature is 38°C, add 5.5kg of aluminum powder, 1.3kg of triethylamine, 18kg of polystyrene composite microspheres were stirred for 3-4min to obtain a premix;
[0029] Polystyrene composite microspheres are prepared by the following process: 12kg of polystyrene emulsion with a solid content of 13.5wt% and a number average particle diameter of 150-180nm, 0.13kg of calcium lignosulfonate, and 65kg of water are mixed evenly, and the Add 5kg of polypyrrole to it and stir for 5.5h, add 2.5kg of potassium persulfate aqueous solution with a concentration of 0.18mol / L, add 8kg of a p-toluenesulfonic acid solution with a concentration of 1.2mol / L under stirring, adjust the temperature...
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