Effect of mixing and curing waters on the behaviour of cement pastes and concrete Part 2: Properties of cement paste and concrete

The effect of natural waters on the setting time of some hydraulic cements and on the compressive strength of the corresponding concrete is investigated. The setting time of ordinary portland cement is most affected by the water type followed by the sulfate resisting cement; the mixed cement (El-Karnak) and the portland blastfurnace slag cement are quite insensitive. The compressive strength of plain concrete cubes aged up to 17 months is unaffected by the type of mixing and curing water.(A) For part one of this article see IRRD 825652.