Fly-ash concrete compositon, method of preparation by geo-polymeric reaction of activated fly-ash and its use.

摘要

Fly-ash concrete, its composition, method of preparation of fly-ash activated by geo-polymeric reaction, and its use, when the synthesis of geo-polymers takes place by alkaline activation of fly-ash mixture at a temperature from 40° C to 80° C, preferably by alkaline activation with Na₂SiO₃ water glass solution in an amount of 6 -12% of dry mass on weight of fly-ash and sodium hydroxide NaOH in amount of preferably 4 - 8% of dry mass on weight of fly-ash.
For improving the consistency of the fly-ash concrete it is possible to add water up to total water-cement ratio water in solutions + added water ∑v/pop = w 0.45 up to 0.6.
By the amount of fly-ash regarding to aggregate, it is possible to regulate not only the consistency of fresh fly-ash concrete, but also its final solidity and resistance to aggressive environments.