DefinePK

Abstract

A bituminous paving mixture is a mixture of coarse aggregate, fine aggregate and bitumen mixed in suitable proportion to result strong and durable mix to withstand traffic load. In this paving mix, normally cement and stone dust are used as filler material. A study has been carried out in this study to explore the use of fly ash, a by-product of a coal based thermal power plant in bituminous paving mixes. For comparison, control mixes with cement and stone dust have also been considered. Marshall test has been considered for the purpose of mix design as well as evaluation of paving mixes. Other performance tests such as indirect tensile strength and retained stability have also been carried out. It is observed that the mixes with fly ash as filler exhibit marginally inferior properties compared to control mixes and satisfy desired criteria specified by a much higher margin. Hence, it has been recommended to utilise fly ash wherever available, not only reducing the cost of execution, but also partly solve the fly ash utilisation and disposal problems.