Physico-thermal properties of composite- filled cement pastes

Abstract EN

The effect of limestone filler on the hydration characteristics as well as the fire resistance of composite cement pastes up to 800 °C has been investigated.

The hydration characteristics of cement pastes assessed by the determination of combined water content as well as bulk density, total porosity and compressive strength.

The effect of fire on the cement pastes were investigated from the weight loss, bulk density, total porosity and compressive strength up to 800˚C for two hours.

Although partial replacement of basalt both by silica fume and limestone does not offer additional enhancement on the hydration characteristics of used control cement paste, it does not reduce the fire resistance of hardened cement pastes up to 600 °C due to the filling role of limestone.

From the above findings it can be concluded that composite cement pastes containing 80 % OPC, 5-0 % basalt, 10 % silica fume and 5-10 % limestone can be used as fire resisting cement.