Are they just two different terms for the same thing?
Concrete is the what is made when mixing rock sand and cement together. cement is product of various calcined mixtures of clay and limestone, usually mixed with water and sand, gravel, etc., to form concrete, that are used as a building material.
Cement is made from ground and fired limestone and gypsum. It is a fine dry powder and when water is added can be a glue-type material. Concrete is a combination of cement, sand, gravel and water. When combined in specific proportions this combination makes concrete.
Concrete is a mixture of cement, sand, water, and rocks. Cement is a fine powdery limestone dust. Cement needs the aggregate materials to hold together.
Cement should not be confused with concrete as the term cement explicitly refers to the dry powder substance. Upon the addition of water and/or additives the cement mixture is referred to as concrete, especially if aggregates have been added.
Cement is the mixture used in producing the finished product of concrete. Kp
