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    • A study on copper slag as fine aggregate in improving the electrical conductivity of cement mortar


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      Electrically conductive mortar (ECM) is a special type of mortar that can be used in applications such as deicing pavements, anti-static flooring, cathodic protection, self sensing etc. ECM can be prepared by incorporating electrically conductive particles in concrete. The carbon materials like graphite, carbon nanofibres, carbon nano tubes are generally used in the development of ECM. In order to make the ECM more sustainable and cost effective, industrial solid wastes having electrically conductive properties are attempted in this study. Carbon black and high carbon content bagasse ash obtained from petroleum and sugarcane processing industries respectively are used as cement replacement materials. Copper slag and steel slag are used as conductive fine aggregates in the development of ECM and tire waste, a coarser petroleum by-product is also used as fine aggregate substitute. Results indicated that the presence of high content of Fe2O3 in copper slag increased the conductive property of ECM. The 100% replacement of conventional fine aggregate by copper slag aggregate made the ECM more sustainable. The compressive strength of copper slag mortar is also found be higher than the steel slag or river sand mortar. The study demonstrates the usefulness of copper slag as fineaggregate in the development of special mortar.

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