PARAMETRIC STUDY OF HIGH STRENGTH STEEL FIBRE REINFORCED CONCRETE FOR HEAVY DUTY PAVEMENTS

Abstract

Concrete pavements are recently, receiving increasing attention of engineers, due to easy availability of cement and its mass production. Also there is a growing interest in the construction of concrete pavements, due to its high strength, durability, better serviceability and overall economy in the long run. With the advent of modernisation and mechanisation, emphasis is on the construction of thinner pavement sections of better quality, which can bear the heavy loads. The high strength steel fibre reinforced concrete (HS SFRC), is a concrete having compressive strength greater than 41 MPa, made of hydraulic cements and containing fine and coarse aggregates, and discontinuous, unconnected, randomly distributed steel fibres. The present study illustrates, the design methodology of HS SFRC mix as well as the HS SFRC pavement. In this study, the compressive and flexural strength for high strength concrete mix as well as HS SFRC for different aspect ratios of steel fibres are reported and found out that the maximum increase in compressive strength and flexural strength is for the fibres with aspect ratio of 80. This study is carried out by finding the concrete properties, laying the pavement and then carrying out semi-full scale field studies on it.