CALORIMETRIC STUDIES OF CEMENTITIOUS MATERIALS - CHROMIUM INTERACTION

Cementitious systems based on portland cement are used for immobilizat ion of toxic and hazardous wastes. The addition of waste material may impact the hydration reaction in cement matrix and consequently the se tting and hardening process. The progress of reaction can be monitored by heat evolution measurements and the calorimetric results can indic ate the declination from standard behaviour. In this study the microca lorimetry was used to evaluate the heat output during the hydration of cements in the presence of different chromium containing salts, viz. CrCl3, Cr-2(SO4)(3), Na2CrO4 and K2CrO4.