MODEL FOR REACTION BETWEEN CAO PARTICLES AND PORTLAND CEMENT CLINKER

The reaction of CaO particles in a cement clinker is described by a simple model for diffusion-controlled dissolution of spheres. The experimental results agree well with those predicted from data obtained in independent diffusion experiments. Under certain conditions it is possible to determine the maximum size of CaO particles which can react with C2S to give C2S within a given reaction time; further, for a given size distribution of CaO particles, the content of free CaO in the clinker after a given burning time can be estimated.