Patent ID: 7396402
Filing Date: 2008-07-08
Classification: B28B,C04B,E04C,E04F,Y02W,Y10S,Y10T

Abstract:
1. A dewatering aid for dewatering a cementitious slurry coating on a product, said dewatering aid comprising a particulate material in an effective quantity and particle size to maintain porosity in the slurry and the product to be coated during dewatering and thereby permit dewatering of the slurry through the product to be coated, wherein said dewatering aid is fly ash particles having two components with a first larger size component of particles of about a 100 micron maximum size in an amount of about 10 to 60 wt % of the cementitious slurry based on total dry ingredients, and a second smaller size component of particles of about a 10 micron maximum size in an amount of about 5 to 30 wt. % of the cementitious slurry based on total dry ingredients.