Concrete



Some Definitions about Concrete


 * Concrete: ** Is a manufactured mixture of cement and water, with aggregates of sand and stones, which hardens rapidly by chemical combination to a stonelike, water-and-fire-resisting solid of great compressive but low tensile strength.


 * Reinforced concrete: ** Was developed to add the tensile strength of steel to the compressive strength of mass concrete. We can use it in railway ties, pipes, floors, arches, and bridges. The metal is embedded by being set as a mesh into the forms before pouring, and in the hardened material the two act uniformly. The combination is much more versatile than either product; it serves not only for constructing rigid frames but also for foundations, columns, walls, floors, and a limitless variety of coverings, and it does not require the addition of other structural materials.




 * Precast Concrete :



**
 * Prestressed concrete:



Concrete- Shell:

**