CONSTRUCTION MATERIAL BASED ON ACTIVATED FLY ASH

摘要

The invention concerns cost effective concrete formulations based on an alkali activated binder. The construction material of the concrete type, contains sand, fine aggregates, coarse aggregates, water and a binder comprising: - from 55 to 80 wt. % of fly ash containing less than wt. 8% of CaO; - from 15 to 40 wt. % of blast furnace slag; and - a chemical activator containing : o from 0.8 to 4 wt. % of alkaline silicates; and o from 1.5 to 9 wt. % of alkaline carbonates,; o wherein the chemical activator has an silica to alkali molar ratio from 0.1 to 0.55; - a booster comprising at least one strong base. The invention also concerns a method to produce such a concrete construction material.