What are the raw materials used in the manufacturers of Portland cement?
The two main raw materials employed during the manufacturer of Portland cement are calcareous materials like limestone, chalk, shells or marl and argillaceous materials like clay and shale (rich in silica). 6) Are there different types of portland cement? Though all portland cement is basically the same, eight types of cement are manufactured to meet different physical and chemical requirements for specific applications: • Type I is a general purpose portland cement suitable for most uses. • Type II is used for structures in water or soil containing moderate amounts of sulfate, or when heat build-up is a concern. • Type III cement provides high strength at an early state, usually in a week or less. • Type IV moderates heat generated by hydration that is used for massive concrete structures such as dams. • Type V cement resists chemical attack by soil and water high in sulfates. • Types IA, IIA and IIIA are cements used to make air-entrained concrete. • They have the same properties as
