Experimental investigation surface abrasion resistance and surface frost resistance of concrete pavement incorporating fly ash and slag

This investigation was carried out to study the effects of the type and amount of supplementary cementitious materials on mechanical properties and surface durability of Portland cement concrete (PCC) pavement. Three supplementary cementitious materials, two types of fly ash and one ground granulated blast furnace slag, were selected to substitute for a portion of Portland cement with three level contents (5, 15, 25 wt% and 15, 25, 35 wt% for single and compound adding, respectively) in the concrete mixtures. Properties of the concrete were evaluated in laboratory including compressive strength, flexural strength, surface abrasion resistance, surface frost resistance,and microstructure analysis. The results show that the early age strength values of concretes were affected as increasing the replacement contents regardless of fly ash and slag. Effects of both the type and dosage of supplementary cementitious materials on surface abrasion resistance and frost resistance of concrete were remarkable. The concrete with slag had poorer wear resistance than reference concrete and those with fly ash. In addition, general fly ash concrete had worse surface frost resistance than other mixtures, and concrete with slag exhibited better surface frost resistance in saturated sodium chloride solution than reference one and fly ash concrete.