BINDING AGENT Russian patent published in 1998 - IPC

FIELD: production of new building materials; utilization of wastes resulting from activities of thermoelectric plants; environmental control. SUBSTANCE: present invention recommends to add to binder composition high-calcium fly ash, slag resulting from pyrometallurgical treatment of fly ash and gypsum, said components being used in following weight ratio, wt.%: high-calcium fly ash 24-30; slag 65-70; gypsum 5-6. EFFECT: 1) higher strength and better quality of building materials using proposed binder; 2) fly ash causing serious ecological problems is here utilized and gives profit. 3 tbl