Abstract
This research experimentally investigated the bond strength of recycled aggregate concrete containing high volume ground granulated blast-furnace slag (GGBFS). Concrete mixtures made with 0%, 15%, 45% and 75% replacement of cement with GGBFS were prepared. Water-to-binder ratios ranged from 0.30 to 0.50. The fresh properties, compressive strength and pullout bond strength of concrete were measured and presented. Test results shows that the compressive strength and bond strength of concrete containing GGBFS were superior to the concrete without GGBFS at all ages. In addition, the bond strength of the recycled aggregate concrete containing high volume GGBFS (75% cement replacement) could exceed that of natural aggregate concrete without GGBFS. This result shows that it is feasible for applying recycled aggregate concrete incorporating high volume GGBFS in concrete constructions.
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