Process for producing building binders and products from fly ash obtained by combustion of solid fossil fuels

摘要

BACKGROUND OF THE INVENTION The present invention relates to a method for producing building materials and a product from fly ash obtained by burning solid fossil fuels. %, Based on the weight of the ash, dry or in the presence of water, and a chemical activating additive, capable of delivering alkali metal and alkaline earth metal ions and / or increasing the pH, is added to the amount of 0.10% to 15.00% based on the weight of the fly ash, or an aqueous solution thereof and / or is heated in the presence of water at a temperature of from 70 degC to 100 degC at atmospheric pressure or in an autoclave at temperatures of 100 degC to 400 degC. C or at a pressure of from 1 to 50 MPa, to obtain a dry building material or a formable moist building material which is optionally formed into the desired shape of the building product.