Replacement of conventional material with FCMs in sub-base of opencast mine haul road to reduce strain-An investigation

Abstract

Fly ash is a major by-product of thermal power plants. Fly ash occupies huge land areas and causes environmental pollution. So its gainful utilization is important. This paper presents detailed laboratory investigation carried out on clinker stabilized fly ash–mine overburden mixes to find out its suitability in sub-base of opencast mine haul road pavements. Proctor compaction test and unconfined compressive strength (UCS) tests were conducted on the developed composites. Clinker content in the mixture varied between 2% and 8%. Test results showed that an increase in mine overburden content in the mixture resulted in increase of maximum dry density (MDD) of the compacted mixture. An increase in percentage of clinker in the fly ash–mine overburden mixes increased enormously the Young’s Modulus values.