Final answer:
The three main types of cementitious materials are Portland cement, lime, and gypsum.
Step-by-step explanation:
The three main types of cementitious materials are Portland cement, lime, and gypsum.
Portland cement: This is the most common type of cement used in construction. It is made by grinding clinker, a hard nodular material produced by sintering limestone and clay, with gypsum.
Lime: Lime is another type of cementitious material that has been used for centuries. It is made by heating limestone to produce quicklime, which is then mixed with water to form a paste.
Gypsum: Gypsum, also known as plaster of Paris, is a type of cementitious material commonly used for interior wall finishes. It is made by heating gypsum rock to remove the water content, which is then ground into a fine powder and mixed with water to form a paste.