PROCESS FOR MANUFACTURING ECOLOGICALLY PURE AND LIGHT POLYSTYRENE-CEMENT PRODUCTS Russian patent published in 1997 - IPC

FIELD: building materials. SUBSTANCE: claimed invention describes process for preparing light ecologically pure products used for construction of building structures. Polystyrene foam granules are first subjected to thermostatically controlled treatment and are then treated with complex chemical additive comprising mixture of dicarboxylic acids, mixture of inorganic acid salts and saponified wood resin, the ratio of components is as follows, wt. -%: 67-75 cement, 67-75; granular thermostatically controlled polystyrene foam, 4.75-5.55; 0.25-0.45 complex chemical additive, 0.25-0.45; and water, the balance. The claimed invention makes it possible to reduce considerably harmful discharges into environment which do not exceed numeral values the maximum permissible concentration when manufactured structures are by 30-50 % more frost resistant as compared with the prior art technical solution. EFFECT: more efficient manufacturing process. 3 cl, 3 tbl