Study of heat of hydration of Portland cement used in Iraq

- Heat of hydration was maximum in (COP-1) cement then (COP-2) and finally (COP-3) cement.
- Heat index were 93.6, 89.6 & 80.8 for (COP-1), (COP-2) and (COP-3) cement respectively.
- Heat of hydration were increase with increasing curing temperature.
- Heat of hydration was increase with increasing water to cement ratio.
- The optimum heat of hydration was from (COP-1) cement.

This study aims to obtain the heat generated from cement hydration, effect of chemical properties and curing temperature on heat of hydration.Ordinary Portland cement used from different plants, which were north (COP-1), middle (COP-2) and south (COP-3) of Iraq. Two water to cement ratios (w\c) (0.4 & 0.6) and four levels of curing temperature (25°, 30°,40° and 50 °C) were used.The experimental results showed that the optimum heat generation from hydration of cement was from (COP-1) cement, then (COP-2) cement and finally (COP-3) cement. Also the causes of variation were discussed.