EFFECT OF MIXING AND CURING WATERS ON THE BEHAVIOUR OF CEMENT PASTES AND CONCRETE. PART 1: MICROSTRUCTURE OF CEMENT PASTES

Abstract The influence of Sea, ground, Nile and drinking waters on the microstructure of some hydraulic cements is investigated by means of X-ray diffraction analysis. The calcium sulfo- and carboaluminate hydrates form well with a water cement ratio of 2. Seawater leads to the precipitation of gypsum. The hydration products of ordinary portland cement (OPC) pastes hydrated for a year with the four water types are similar. A survey on the analysis of waters used is given.