Investigation of Self Healing Capability of Concrete With Recycled Waste Materials Additives and Waste Water

Abstract

newline (v) newlineABSTRACT newlineConcrete is the most widely used material on earth after water. In the era of new developments in newlineconstruction sector, the demand for natural resources has increased so much that it is now widely newlineconsidered as a serious threat to our environment, economic and social equilibrium. Attention newlinehas been brought to the re-use of resources whenever possible to sustain the environment and to newlineminimize the depletion and degradation of natural resources. To meet the global demand of newlineconcrete in the future, it is becoming a more challenging task to find suitable alternatives to newlinenatural water and natural aggregates for preparing concrete because these natural resources are newlinebecoming increasingly scarce. Therefore, the use of alternative sources for natural water and newlinenatural aggregates is turn out to be essential. newlineSteel slag is a co-product of the iron and steel making process. The use of steel slag aggregates in newlineconcrete by replacing natural aggregates is a most promising concept due to their mechanical newlinestrength, stiffness, porosity, wear resistance and water absorption capacity. Replacing all or some newlineportion of natural aggregates with steel slag would lead to considerable environmental benefits. newlineMoreover, the usage of tap water is getting more intense with the advanced development in newlineconcrete industry. In order to reduce the tap water consumption, wastewater can be used as newlinesubstitute in concrete mixture. However, the use of wastewater and waste materials in concrete newlinelead to generate pores and cracks in concrete. In the present research, self-healing of concrete by newlineMICCP (Microbiologically Induced Calcium Carbonate Process) technique is found as newlinesustainable solution to fill these pores and cracks of concrete. newlineIn the present research, it was found that the use of raw wastewater for preparation of concrete newlinedecreases the compressive and flexural strengths by 9.45 and 17.15% respectively at 28 days newlinedue to presence of organic impurities. Therefore, a constructed wetland was made for