Early age hydration and autogenous shrinkage of blended cement containing brick powder

Early age hydration and autogenous shrinkage of blended cement containing brick powder (BP) was investigated using hydration heat, internal relative humidity (IRH) and 1H NMR methods. The results show that BP can promoting the early nucleation and growth process of cement. The unique porous structure of BP gives it water absorption property, which plays a role in internal curing. The internal curing effect of BP reduced the rate of decrease of IRH in cement paste and effectively reduced the autogenous shrinkage of cement paste. These findings suggest that moderate adjustment of the dosage of BP can effectively promote the hydration and control the autogenous shrinkage of cement-based materials.