Development of pavement quality concrete with SCM’s, fibers and graphite

Abstract

Concrete is widely used for the construction of pavements all over the world. Nevertheless, normal cement concrete has certain shortcomings, which are low flexural strength, and high thermal conductivity. So, to overcome these draw backs admixtures like fly ash, silica fume etc. are used. Further, fibers also significantly participate in reducing the thermal conductivity and improving the flexural strength of concrete. Increasing coarse aggregate content also, decreases the thermal conductivity of concrete, but it reduces the flexural strength. The aim of this study is optimize the aggregate content and make sequential inclusion of mineral admixtures as well as fibers and graphite to enhance the mechanical, Durability and thermal conductivity properties of pavement quality concrete. This studies show that a permissible amount of 55% coarse aggregates could be used along with 10% of silica fume (SF) and 20 % of fly ash (FA) in the presence of 1.5% of steel fibers and 10% of graphite to yield better result in comparison to conventional concrete.