Usability of Waste Steel Grits in Concrete Pavement

Abstract

The usability of waste steel grits and limestone sand in the construction of concrete pavement was investigated. Four different types of pavement concretes were produced, including coarse limestone concrete not containing waste steel grit, coarse limestone concrete containing waste steel grit, limestone sand concrete not containing waste steel grit, and limestone sand concrete containing waste steel grit. In this study, water/binder ratio in concrete production was taken as 0.44. In the production of limestone sand concrete containing waste steel grit, limestone sand with a grain diameter of 0.1–1.0 mm was used as aggregate. Waste steel grits with a grain diameter of 0.2–0.7 mm were added to the concrete mixture. Standard water curing and combined curing were applied to concrete samples. After standard water curing and combined curing, compression and bending tests of the same types of cube and beam concrete samples were carried out. As a result of the study, the maximum compressive and bending strengths were found to be 50.21 MPa and 5.07 MPa for limestone sand concrete containing waste steel grit. The study results show that waste steel grits increase the compressive and bending strength of concrete pavement.

Keywords

infrastructures for sustainable transport / sustainable cement-based materials / concrete pavement / concrete curing / waste steel grits