Автор работы: Пользователь скрыл имя, 20 Марта 2013 в 20:06, реферат
What is Cement?
Cement is a hydraulic powder material, which reacts with water to produce strength-bearing lattices. The mixture of aggregates, cement and water is concrete. The strength and durability of concrete makes it one of the most useful materials developed by man. The chemistry and mineralogy of cement is complex. In simple terms, cement is a manmade mineral structure created at high temperatures, mainly comprising lime (CaO), Silica (SiO2) and oxides of aluminium and iron (Al2O3 and Fe2O3).