Concrete is a well proportioned mixture of cement and other cementitious materials such as fly ash and slag cement, coarse aggregate made of crushed stone, fine aggregate such as sand, water, and...
Pouring a concrete slab is the pouring of a fresh unset concrete mix into a prepared area, where it is finished by floating etc to give the required surface, and it sets to form a slab.
It can have different meanings, depending on how it is used. A common meaning of refractory is a type of concrete intended for use in very high heat conditions, such as the inside of a furnace. These...