Title : RECENT DEVELOPMENTS IN THE INDIAN CONCRETE INDUSTRY IN THE USE OF GGBS IN CONCRETE AT RMC BATCHING PLANTS AS PARTIAL REPLACEMENT TO OPC CEMENT AND ITS EFFECTS ON CONCRETE DURABILITY AND SUSTAINABILTY
Authors : L.R.Manjunatha,Sandhya.R.Anvekar,M.V.Yogananda
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Price : 250
Abstract : Sustainability, or sustainable development in concrete and construction industry, is aimed at improving the quality of life for everyone, now and for the next generations. It encompasses environmental, economic and social dimensions, as well as the concept of stewardship, the responsible management of resources we use in construction and particularly concrete production in India being the second largest producer of cement in the world. The future challenge for the construction industry in India is clearly to meet the growing needs for infrastructure development and housing while at the same time limiting the impact of its burdens in CO2 emissions due to construction by drastic improvements in the use of alternative materials in construction and supplementary cementing materials as partial replacements to OPC. Cement and steel production accounts for almost 19-20 % of CO2 emissions in India. Due to exponential growing in urbanization and industrialization, byproducts from the steel industries such as GGBS are becoming an increasing concern for recycling and waste management. At same time, studies have revealed usage of GGBS in concrete as a partial replacement for OPC have increased the compressive strength, tensile strength, durability and decreases the permeability, embodied energy and cost per cubic meter. By knowing the numerous advantages of industrial byproducts, Ready-mixed concrete (RMC) industries have partially replaced the cement with Fly Ash, GGBS, ultrafine GGBS or Silica Fume, which are by-products of other industries. Currently over 40-45 % of the concrete supplied by RMC companies in India has a replacement of Fly ash and GGBS. The acceptance level for blended cements and concretes in India is increasing because of inherent mechanical properties of mineral admixtures and easy availability in southern and western markets. GGBS blended concrete have been used successfully in concrete for many years in many countries throughout the world were structures have to be designed for durability requirements in very aggressive environment. The research paper deals with how the RMC and concrete industry in India is progressively using GGBS, how the growth and the adoptability is happening through RMC way, case studies which have revealed durability and permeability of concrete in presence of GGBS.