RAW MIXTURE FOR EXTRA STRENGTH AND HEAVY CONCRETE MAKING Russian patent published in 1997 - IPC

FIELD: building industry. SUBSTANCE: raw mixture for making heavy concrete (class B80-B105) has cement (sort is M500, not below), large and small filling agents made of preliminary treated scale, water and superplasticizer based on Na-salts of condensation product of naphthalene sulfoacid with formaldehyde. Component consumption, kg/$$$ concrete: cement (sort - M500, not below) 610-650; large filling agent from the above indicated scale: fraction 10-20 mm 800-1000; fraction 5-10 mm 900-1200; small filling agent from the same scale: fraction 1.25-5 mm 400-500; fraction 0.63-1.25 mm 400-500; fraction 0.16-0.63 mm 500-650; water 165-180, and superplasticizer 0.5-1% of cement consumption. In alternative variant scale treated in ball mill for 20-40 s and enriched by removal of fractions below 0.31 mm is used. EFFECT: increased strength and density of concrete. 2 cl, 4 tbl