Relation between Cantabro Loss and Surface Abrasion Resistance of Fly Ash Roller Compacted Concrete (FRCC)

In this paper an attempt has been made to know the effect of Fly Ash (FA) on Roller Compacted Concrete (RCC) properties like strength and abrasion resistance. The Cement was partially replaced by three kinds of replacements (20%, 40% and 60%) of class F Fly Ash. The RCC mixtures were designed to have a 28 days flexural strength of 5.0 N/mm2. The specimens were subjected to two types of abrasion resistance tests such as Contabro test and surface abrasion resistance test with rotating cutter besides Compressive and Flexural strength tests. Experimental results shows that the Cantabro loss and surface abrasion loss were increased with increase in Fly Ash content in relation with the strength of roller compacted concrete pavement at the ages from 7days to 180days compared to control mix concrete. Equations were established based on compressive strength and flexural strength which were influenced by cement replacement by Fly Ash and developed to predict abrasion resistance of FRCC at any age. Also a relationship was established between Cantabro loss and surface abrasion loss of FRCC regardless of age and percent replacement of Fly Ash.