what is composition of cement?
t depends on exactly what kind of cement you are referring to. Portland cement is the most common kind, and it has several types with slightly different compositions. There are four major compounds in cement and these are known as C2S, C3S, C3A C4AF, and their composition varies from cement to cement and plant to plant. Type 2 portland cement is cement that has been modified to have better resistance to sulfates - a great quality to have if the concrete you're making ends up being in contact with soil containing a lot of sulphur like in the Western part of the U.S. It about the same price as type 1, but has some other limitations. Here is the breakdown of its chemical makeup (by mass %): 51% - C3 S 24% - C2 S 6% - C3 A 11% - C4 AF 2.9% - MgO 2.5% - SO3 0.8% - Ignition loss 1.0% - free CaO The extent of chemical compounds in cement S no Compound Composition as % 1 C3S 48-52 % 2 C2S 22-26 % 3 C3A 6-10 % 4 C4AF 13-16 % 5 Freelime 1-2 %
