THE INFLUENCE OF TEMPERATURE ON UNRESTRAINED VOLUME CHANGES IN CEMENTITIOUS MATERIALS

摘要

This paper examines the influence of temperature on chemical shrinkage and unrestrained autogenous volume change in cementitious systems. The apparent activation energy of cement hydration is determined using measurements of chemical shrinkage. Equivalent age transformations are performed on the experimentally measured data. The results indicate that equivalent age transformations are suitable for describing the influence of temperature on chemical reactions, but are in general an inappropriate procedure for simulating the evolution of autogenous volume change in cementitious materials cured at different temperatures.