Cementiferous compositions.

摘要

This invention provides cementiferous compositions having improved flow characteristics which are given by the incorporation of certain hydroxy estercopolymers. The copolymers include those of acrylic or methacrylic acid with a hydroxyalkyl acrylate or methacrylate and are used preferably in the range 0.01% to 2.5% w/w on the cement in the cementiferous composition. This invention also provides novel additive compositions for use in the cementiferous compositions which, in addition to the copolymer, also contain an anti-foaming agent.