A discussion of the papers “the effect of dicalcium silicate (C 2S) and tricalcium silicate (C 3S) on the thermal stability of vinyl type polymer concrete” and “hydrothermal stability on vinyl type polymer concrete containing tricalcium silicate” by T. Sugama and K.E. Kukacka

Abstract

Interaction of polymers and other organic admixtures on Portland cement hydration is reviewed. This has been compiled in a systematic way. First hydration of Portland cement is described in short. Later, interaction with 4 important components of Portland cement is discussed. Finally interphase effects in polymer modified hydraulic cement are discussed. It is concluded that polymers and organic admixtures interact with the components of Portland cement when they come in contact with water. This interaction is due to ionic binding, causing cross-links which inhibit the film formation property of polymers and influence considerably the crystallisation process during the hardening of concrete. Some low molecular weight organic substances also have a considerable influence on Portland cement during its reaction with water.