CONCRETE MIXTURE Russian patent published in 1996 - IPC

FIELD: building industry. SUBSTANCE: concrete mixture has, wt.-%: portland cement 18.9-19.4; rubble 44.1-44.5; sand 35.0-35.6; superplasticizer based on naphthalene-sulfoacid sodium salt with formaldehyde C-3 0.1-62; powder-like polyvinyl acetate 0.8-1.1; methylpyrazole 0.1-0.2. Compression strength of concrete is 37.5 MPa, water absorption is 3.15%; density is 2.29 t/m³; adhesion to metal is 12.6 MPa; adhesion to concrete is 14.3 MPa; current density at E = 1500 mv mcA/cm² after 30 test cycles is about 3.2. EFFECT: enhanced quality of mixture. 2 tbl