BUILDING PRODUCTS

摘要

A method of forming a cementitious product comprising mixing a cementitious material with a siliceous material and a low bulk density material with water to form a slurry, forming a green shaped article from the slurry and curing the article in an autoclave. The low bulk density is substantially calcium silicate hydrate which is preferably obtained by reacting a calcareous reactant with a siliceous reactant in the presence of water and elevated temperature with at least 90 wt.% of the siliceous material having a particle size of less than 100 microns. Optionally the material can also include 0-25 % of fibrous material and 0-40 % of other additives. The resultant cementitious product is suitable for internal and external applications.