The Holcim Group company and a leading cement manufacturer ACC has announced an investment of Rs 3,300 crore by 2015 to set up three grinding units and a clinker facility, the company Managing Director and Chief Executive Kuldeep Kaura said on the sidelines of the company’s 76th Annual General Meeting in Mumbai on March 28.The company said one grinding unit each will come up at Sindri in Jharkhand and Kharagpur in West Bengal. The third grinding plant and the clinker facility will be set up at Jamul in Chhattisgarh. The existing clinker and grinding facilities at Jamul will be phased out, he said, adding the new clinker unit will have a capacity of 2.79 million tonne per annum (mtpa).