Chettinad Cement Corporation, India plans add an additional capacity of 500,000t at its Dindugal plant in Tamil Nadu, taking the total plant capacity to 1.7Mt. The company is setting up a grinding unit to utilise the idle clinker capacity with an estimated investment of Rs 50 crore, according to sources. The additional capacity has been necessitated due to an increased demand for the commodity in southern region, particularly in Tamil Nadu and the expected huge gap in demand and supply in the coming years.