METHOD OF PREPARING ADDITIVE TO CONCRETES AND SOLUTIONS

摘要

FIELD: construction, particularly, manufacture of concrete and reinforced concrete products. SUBSTANCE: method comprises sulfonating original aromatic hydrocarbon stock, condensing sulfonated stock with formaldehyde and neutralizing the resulting product. Said original stock includes stillage residue resulting from production of aromatic hydrocarbons and process of catalytic reforming of gasoline that evaporates at temperature higher than 210 C. The present invention makes it possible to improve properties of additive, increase strength and frost resistance of concrete. EFFECT: more efficient preparation method. 1 tbl