Production of cellular concrete blocks
阅读：358发布：2022-10-23
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1. METHOD OF PRODUCING LIGHTWEIGHT CONCRETE CONSISTING IN MIXING ABOUT 1 PART OF EACH BY WEIGHT OF PORTLAND CEMENT AND ASH FROM THE COMBUSTION OF PULVERISED BITUMINOUS FUEL IN FURNACES AND RECOVERED FROM THE COMBUSTION GASES BY SEPARATOR WITH 0.5 TO 4.7 PARTS OF SAND, ADDING TO THE MIXTURE WATER AT A TEMPERATURE OF ABOUT 60* TO 70* C. IN SUFFICIENT QUANTITY TO FORM AND FORMING THEREWITH A CREAMY SLURRY, ADDING ALUMINUM POWDER TO THE SLURRY AS A DISPERSION IN A SOLUTION CONTAINING ABOUT 0.3 TO 1 ML. PER POUND OF CEMENT OF A 5% SOLUTION OF A WATER SOLUBLE STABLISHING AGENT OF HIGH MOLECULAR WEIGHT WHICH IS SURFACE ACTIVE AND FORMS AN AQUEOUS SOLUTION OF HIGH VISCOSITY SELECTED FROM THE GROUP CONSISTING OF SODIUM CARBOXY METHYL CELLULOSE ETHYL METHYL CELLULOSE AND ABOUT 1.5 TO 2 MLS. PER POUND OF CEMENT OF A 10% SOLUTION OF A WETTING AGENT POSSESSING HYDROPHILIC GROUPS OF THE NON-DISSOCIATING TYPE, MIXING THE DISPERSION WITH THE SLURRY TO PRODUCE A THOROUGH DISPERSION OF THE ALUMINUM POWDER, AND THEN ADDING ALKALI SHORTLY BEFORE DISCHARGING THE MIXTURE INTO A MOULD.
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