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** ||

, employs bricks, slabs, and supports made under optimal factory conditions to increase waterproofing and solidity, to decrease time and cost in erection, and to reduce expansion and contractions. ||
 * ** Precast-concrete construction **

provides bearing members into which reinforcement is set under tension to produce a live force to resist a particular load. Since the member acts like a **spring**, it can carry a greater load than an unstressed member of the same size. ||
 * ** Prestressed concrete **

Concrete shells:





Reinforced concrete:

Precast concrete:





Prestressed concrete:



Tilt wall panel construction and tilt up construction are basically two names to call the same construction technology. Tilt wall construction is based on the formation of walls by assembling forms and pouring large slabs of concrete called panels directly at the job site. The process of precast building, although similar to tilt wall construction, has its differences. The forms are poured indoors in contrast to the other way of construction. That is why contractors don’t have to abstain of working regarding the climatic changes. Tilt-up constructions offers more flexibility and it’s preferred in sites where the weather allows it.

Concrete is important because of its practicality and effectiveness as a construction material. Once upon a time it was used only to combine rocks and stones but nowadays is one of the most used materials everywhere. In the future it is possible that concrete will be used as a combination of several materials such as optic fiber glass to make it more interesting and to extend its uses.