Strength and Durability Properties of High Performance Concrete Containing Copper Slag as Fine Aggregate

Abstract

newlineThe demand of construction materials like cement, fine aggregates and coarse aggregates is newlinemounting day by day with the increase in the infrastructural growth. The exploitation of the newlinenatural aggregates from the parent sources has created an alarming scenario banning the same newlinein many countries due to its consistent usage. Researchers have put great efforts in newlinediscovering alternates for these natural aggregates either in the form of artificial aggregates or newlineby-products from different industries. This has not only compensated the use of natural newlineaggregates but has also given a substitute to the construction sector making it an newlineenvironmental friendly option contributing to the sustainable development. Copper slag (CS) newlineis one of such by-product from the copper industry obtained during the matte smelting and newlinerefining of copper metal which has a promising future to be used as an substitute for the fine newlineaggregates. newlineThe present research investigated the strength and durability of High performance concrete newline(HPC) containing Copper slag (CS) as fine aggregate using Silica fume (SF) and Metakaolin newline(MK) as supplementary cementitious materials. A total of twenty one concrete mixes were newlineprepared in four series with 10% SF, 15% SF, 10% MK and 15% MK substitutions for newlinecement including one control concrete mix. Each series consists of five mixes replacing fine newlineaggregate with CS with the difference of 25% through equivalent volume approach. The total newlinecementitious content was kept constant i.e. 545 kg/m3 in each mix. Total coarse aggregates of newline1150 kg/m3 ,water content of 125.35 litres /m3 and superplasticizer quantity of 1.5% per kg of newlinecement were kept constant throughout the investigation. The water binder ratio is kept as newline0.23. The mixes of each series were investigated for fresh properties by conducting Slump newlinecone test. The mechanical properties of the HPC mixes were assessed by compressive newlinestrength and splitting tensile strength and quality of concrete by Ultrasonic Pulse Velocity test newlineat curing periods of 7, 28, 90