Tamil Nadu Cements (Tancem) is planning to expand its cement unit in Kairalabad Village in Ariyalur district of Tamil Nadu. The project involves expanding cement production capacity from 0.5 mtpa to 1.63 mtpa and clinker production capacity from 0.475 mtpa to 1.475 mtpa. The limestone requirement is to be met from captive mines. The project cost is estimated at Rs. 6000 million.