Studies on Sustainable Concrete using Recycled Aggregate and Industrial Wastes

Abstract

Sustainability of concrete is one of the most important criteria for today s concern as it newlineconsumes significant number of natural resources due to large economic growth and newlineheavy industrialization. In order to make the concrete sustainable and eco-friendly, newlinewaste, or residual materials derived from various industries can be utilized as newlinealternatives for basic materials of concrete as these materials require less amount of newlineenergy for production, less carbon dioxide emission, and is considered cheap and more newlinedurable than the traditional concrete. In an effort to address the growing demand for newlineenvironmentally friendly concrete, many researchers have reported in literature, the newlinefeasibility of replacing natural aggregate with recycled concrete aggregate (RCA) newlinederived from construction and demolition (CandD) waste, for production of sustainable newlineconcrete. When RCA is used properly, the construction industry may reduce the natural newlineaggregate quarrying, saves significant amount of energy and the amount of CO2 emitted newlineby the supplier of the aggregate as well as the material cost. Presently, the production of newlineindustrial by-products from the steel, copper and coal industry is high and generation of newlineslag from industries are abundantly available. Disposal of these industrial slags creates newlineserious environmental problems. Many studies have been conducted on the use of these newlineindustrial by products in place of conventional materials, which in turn protects the newlineenvironment and solves the disposal problems to some extent. Copper slag is an newlineindustrial by-product obtained from the copper industry which can be a potential newlinesubstitute for concrete materials due to its glassy texture, low water absorption and newlinethermal expansion property. GGBFS is an industrial by-product generated from the slag newlineindustry being utilized in various sectors worldwide due to its pozzolanic property. newlineHence, to create a sustainable concrete, more research is required to utilize both newlineconstruction waste and industrial waste together as an alternative construction mater