Thatta Ordinary Portland Cement (OPC) is unique in its Low Alkali content feature with a total content of Alkalies below 0.4%. Thatta OPC has an advantage that it can be used in concrete made with aggregates that contain a form of silica which reacts with Alkalies if present in high proportion to cause an expansion which disrupts concrete. Another special feature of the Thatta OPC is that it has low contents of Tricalcium Aluminate. This helps to control the effect of spontaneous over-heating in large masses of concrete and resistance to sulfate attack.
Thatta Cement Company Limited was incorporated in 1980 as a public limited company. The manufacturing facility was commissioned in 1982, and its plant (located in District Thatta) is based on dry process technology, had a total installed capacity of 1,000 tons per day of clinker. Finest quality raw material deposits are available close to the plant.