Reseaching properties of the roller compacted concrete using steel slag as coarse aggregates in constructing the pavement structure of the road

Abstract

Aggregates form the skeleton structure of concrete and significantly affect its mechanical properties. When aggregates are used in roller-compacted concrete (RCC), steel slag with a rough grain surface and honeycomb structure produces higher friction between particles and more difficulty in achieving the required compaction than traditional crushed stone aggregates. This study investigated the strength of RCC using steel slag (SSA) to replace traditional aggregates with replaced volume contents of 0%, 50%, and 100% in constructing road pavement structures. The results showed that the higher the volume content of SSA used, the lower the strength of the RCC achieved. The flexural strength of RCC using steel slag with replaced volume contents of 50% and 100% decreased by 5.5% and 8.7%, respectively, compared to that of RCC using traditional crushed stone aggregate at the same curing time of 28 d. RCC using steel slag with a replaced volume content of 50% was qualified to construct a road with category IV and below.