CONCRETE COMPOSITION Russian patent published in 1996 - IPC

FIELD: building industry. SUBSTANCE: composition has aluminate portland cement of sort "500" containing tricalcium aluminate (12-14%), quartz sand of fractions less 0.140 mm and (0.140-0.630) mm, microsilica at specific surface (20-40) x 10³ cm²/g; superplasticizer C-3 based on sodium salts of condensation product of naphthalene sulfoacid with formaldehyde and, additionally, sodium water glass at the following ratio of components, wt.-%: aluminate portland cement "500" 28-32; microsilica at specific surface = (20-40) x 10³ cm²/g 1.5-2.0; quartz sand, fraction less 0.140 mm 30.5-31.5; quartz sand, fraction 0.14-0.63 mm 27.0-30.5; superplastizicer C-3 0.5-1.5; water glass 1.5-2.5, and water - the rest. EFFECT: enhanced quality of composition. 2 tbl