METHOD FOR PREPARATION OF BINDING AGENT Russian patent published in 1995 - IPC

FIELD: production of binding agents. SUBSTANCE: method for preparation of binding agent for concrete mix and mortar includes preliminary treatment of commercial lignosulfonates with product of hydrolysis of polyacrylonitrile by means of sodium hydroxide - preparation UNIFLOK at ratio by dry mass of 1: 0.01 and mixing of produced additive with portland cement clinker, gypsum and additionally introduced mineral additive in form of crystalline limestone containing not above 15% of marl and clay admixtures. Binding agent components, mas.%: portland cement clinker 74-79; gypsum 4-5; commercial lignosulfonates 0.05; product of alkali hydrolysis of polyacrylonitrile by sodium hydroxide - preparation UNIFLOK 0.0005; the balance, water. Plasticity of concrete mix is 10 cm, compression strength after 28 days of normal storage is up to 23.6 MPa. EFFECT: higher efficiency. 1 tbl