Estimation of the Applicability for the Filler Produced by Recycling of Concrete and Reinforced Concrete Used in Heavy Concrete

摘要

The estimation of the secondary filler applicability showed that secondary rubble and sand on all indicators satisfy the standard requirements (except the content of dust particles and clay particles) and can be used as filler for construction works. The content of particles sized less than 0.16 mm is 8%, which exceeds the requirements. However, the chemical analysis shows that these particles consist of hydrated and non-hydrated cement particles. The amount of non-hydrated cement, based on cement consumption is about 10%. Consequently, in the course of cement materials production using the secondary rubble and sand you can either reduce the cement consumption or increase the strength of products while maintaining the cement consumption. In turn, the hydrated cement particles can act as additives-the substrates for crystallization. Thus, the screening is a multimineral active additive to cement-based materials.