NTPC Simhadri will develop a plant that produces nano concrete aggregate, at an estimated cost of Rs 500 million. The company will develop ash-based building products which include fly ash bricks, lightweight aggregate, geopolymer coarse aggregate, and interlocking paver tiles. Nearly 300 million tonne of bricks and 300 million tonne of cement will be used. To convert fly ash into aggregate sand, up to 35 per cent of original portland cement can be replaced by fly ash. This can also bring down the cost sustainability besides greater long-term strength, durability and permeability. Contact: NTPC Tel: 011-2436 0100 E-mail: ntpccc@ntpc.co.in Website: www.ntpc.co.in