Concrete


 * 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** //Reinforced concrete is concrete and was developed to add the tensile strength of steel to the compressive strength of mass concrete. It was invented (1849) by Joseph Monier. Joseph Monier promoted reinforced concrete for use in railway ties, pipes, floors, arches, and bridges. 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 //

**Concrete Shell** // Concrete-Shell construction permits the erection of vast vaults and domes with a concrete and steel content so reduced that the thickness is comparatively less than that of an eggshell. //

**Precast Concrete ** // Precast- Concrete construction  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. //

**Prestressed Concrete ** // Prestressed concrete 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. //

**Reinforced concrete**




 * Prestressed Concrete **


 * Precast Concrete **

**Concrete Shell**

** What is the difference between tiltwall construction, tilt-up panel construction and pre-cast concrete construction? **  In a tilt-up construction project, the building's walls are poured directly at the jobsite in large slabs of concrete called tilt-up panels. These panels are then raised into position around the building's perimeter forming the exterior walls. Tilt-up construction allows general contractors to build a wide range of commercial buildings more quickly and with l**ower construction costs**. And Precast concrete buildings are buildings constructed using precast elements. Precast construction is similar to tilt-up construction, except that the concrete wall panels are formed at a manufacturing facility and transported to the job site by trailer, rather than fabricated directly at the site. This prefabricated panel process, provides a more controlled environment for consistent quality, insulated panels and weather protected scheduling. The precast concrete **is expensive** because it requires an offset unlike tilt-up.

**//My opinion about the concrete//**  The concrete one looks like to me that it is a big advance in the progress of the material. It is more resistant, less costly, moldeable and more rapid. Also it has his disabilities in the elements pre-constructed as his high price, also with the concrete one the design has to be more finished.