CONCRETE

CONCEPTS FOUND IN THE TEXT:


 * 1) Concrete **:is a manufactured mixture of cemet and water, with aggregates of sand and stones, wich hardens rapidly by chemical combination. It can be poured into forms while liquid to produce a great variety of elements, it provides an economical substitute for traditional materials.


 * 2) Reinforced Concrete: ** It was made to add the tensile strenght o the steel to the compressive strenght of mass concrete. It was invented in 1849 by Joseph Monier.


 * 3) Concrete-Shell Construction: ** It's the erection of vast vaults and domes with a concrete and steel content reduced, so the thickness is comparatively to an eggshell.


 * 4)Precast-concrete construction: ** Employs bricks, slabs and supports made under optimal factory conditions to increase waterproofing and solidity and to reduce expansions and contractions.


 * 5) Prestressed Concrete: ** Provides bearing members into wich reinforcement is set under tension to produce a live force to resist a particular load.


 * * What is the difference between tiltwall construction, tilt-up panel construction and precast concrete construction? **

=== In my opinion there is no difference  between tiltwall construction and tilt-up panel construction, because  it actually both describe the same process. Tiltwall construction is the creation of walls by assembling forms and pouring large slabs of concrete called panels directly in situ. One advantage is that the size of the panel  depends  by the need of the building because it is work at the job site. And another hand, the major problems is conditioned by the climate of the workplace  .=== === About  precast concrete constructions which are based on the creation of panels where concrete forms are poured indoors so this process addresses the challenges presented by the weather. And unlike tilwall tilt-up, it can’t be produce in a large scale such because of the transportation factor. ===