Investigation of slag supplementary to the concrete rigid pavement mix design

Abstract

The utilization of slag as cement replacement has been widely developed for the concrete mixture. It is shown by the increment of the concrete performance even though unique characteristics during the cement-slag reaction were present. Slag is the waste of the steel industry which has various qualities. Unfortunately, this type of waste is not well identified in past research as supplementary material for the concrete. This paper will study the best proportion of slag cement as supplementary material in concrete for the special use of the rigid pavement. Solely, the mix design criteria for the experiment is not available yet so that preliminary experiment both physical and chemical are investigated for the special purpose of the target of minimum high strength concrete of 35 MPa. The chemical substances of two main oxides of sodium and potassium from ordinary Portland cement is essential to see the alkali activity that leads to the strength quality of the concrete specimen. Otherwise, the consideration of water-cement ratio must be relevant to the quality of concrete matrices.