Some effects of silt contents on the strength of all-in-aggregate concrete

The paper briefly reviews the concepts of dry lean concrete (DLC), roller compacted concrete (RCC) and Econocrete and their possible applications for the construction of subbase in pavement, concrete gravity dam and fill etc. The effects of differing quantities of fraction passing 75 μm on the strength and workability of concrete are reported. The 28 days compressive strength of all-in-aggregate concrete decreased at 1 and 5% silt contents whereas it increased at 10% silt as compared to the silt free concrete exposed to continuous air curing. It was observed that the water curing of all-in-aggregate concrete dramatically improved the compressive strength of the concrete as compared to the air curing. It is also reported that the variations in the pulse velocity on the concrete with differing silt content and curing regimes followed similar pattern of that of the variations in the compressive strength.