Big cement companies like ACC, Ambuja Cement and UltraTech have reported increase in production of between seven and 11 per cent in December. Production at Aditya Birla Group’s UltraTech Cement grew 10.8 per cent to 3.77 million tonne (mnt), ACC reported a growth of 6.28 per cent to 2.03 mnt while for Ambuja it was 1.91 mnt, up 6.81 per cent in December.UltraTech’s despatches for the month grew to 3.62 mnt, up 10.5 per cent, while for ACC and Ambuja, it was 8.85 per cent and 5.75 per cent respectively to 2.09 mnt and 1.82 mnt. For the calendar year 2011, production of ACC grew to 23.66 mnt from 21.21 mnt, while Ambuja’s grew to 20.96 mnt from 20.12 mnt during the same period. Cement despatches of ACC and Ambuja for the period grew to 20.95 mnt and 23.68 mnt from 20.12 mnt and 21.17 mnt respectively.