Cement Energy Environment

31 USE OF INDUSTRIAL AND OVERBURDEN CLAY WASTE AS ADDITIVE FOR LOW CARBON MORTAR & CONCRETE The use of additives as cement supplementary materials in structural concrete is widely accepted by the construction industries in world ( Khamchin.,et al 2015). Expenditure in construction and the growth of infrastructure are major indicators of the development of a nation. Rapid development in this sector faces crucial challenges in terms of economy and resources. Supplementary cementitious materials (SCMs) offer the most promising means to ensure economical and resource efficient construction. SCMs are materials that can partially replace cement and concrete, without a significant impact on its performance. Micro fine materials like silica fume, metakaolin, rice husk ash etc are being used to obtain high strength concrete (Weiting., et al.2016). These micro materials work as pozzolans. They are used to fill up the inter particles spaces of cement grains and react with Ca(OH) 2 produced during cement hydration process. Pozzolanic materials like fly ash, Slag present in concrete react with Ca(OH) 2 and micro fine materials work only as pore fillers. New developed additives are made with Waste mines rejects and overburden of clay mines, which can processes. The aluminosilicate of new additives contributes in the pozzolanic reaction; smaller particle size of new green additives imparts filler effect providing extra sites for nucleation and growth of hydration products, the reaction of carbonates helps in improving efficiency. New innovative additive for low carbon Mortar and concrete produced from widely available mines waste materials and overburden of clay mines as a step towards sustainable infrastructure development. Being a versatile product, it can be used as a additive during concrete production. New additives as PP+ improve properties of concrete by several simultaneous Introduction Abstract By Mukesh Kumar and Sunil Kumar Saxena Research & Development Centre, JK Lakshmi Cement Limited