Concrete


 * Concrete is a mixture of cement and water
 * Concrete was employed in ancient Egypt
 * Reinforced concrete was invented by Joseph Monier



Post-reading 2. Definitions:
 * Concrete: is a manufactured mixture of cement and water, with aggregates of sand and stones.

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 * Reinforced concrete
 * Pre-cas concrete
 * Prestressed concrete
 * Concrete-shell

concrete construction? || > For a precast construction project, the panels must be smaller and more manageable to allow trucks to haul them over the road to their final destination.This places greater restrictions on the designs of architects.
 * What is the difference between tiltwall construction, tilt-up panel construction and pre-cast
 * For a tilt-up concrete building, the walls are created by assembling forms and pouring large slabs of concrete called panels directly at the job site.
 * Because the concrete tiltwall forms are assembled and poured directly at the job site, no transportation of panels is required.
 * Tiltwall panels can sometimes be extremely wide and/or tall while tilt-up panel have been measured at just over 69 feet across and almost 93 feet from top to bottom.
 * Because concrete tilt-up walls are poured outdoors, contractors are at the mercy of climatic conditions while the precast concrete forms are poured indoors, this activity can take place regardless the weather conditions.
 * Because tilt-up affords more flexibility, it is the method of choice in locations where the weather allows it.
 * Precast concrete is a suitable choice in circumstances where environmental factors.
 * The construction schedule preclude tiltwall as a viable option.
 * Precast concrete walls presents a different limitation not found in tilt-up construction.

Conclusions: Use of concrete Concrete is a mixture of water, cement and other aggregates that hardens, allowing you to create rigid, strong and in turn resistant structures to external factors of nature. Because of its great advantages, concrete was used in ancient Egypt, providing an expancion of architectural methods. As time went on, different types of concrete were developed: concrete-shell that allows the erection of vaults and domes with a reduced content of concrete and steel, precast-concrete that has bricks, tiles and supports, to increase waterproofing and solidity, to decrease time and cost in erection; and prestressed concrete provides bearing members into which reinforcement is set under tension to produce a live force to resist a particular load. Today, concrete is the main material used in construction. For its wonderful features is that our homes were built of concrete. media type="file" key="use of concrete2.wma" width="251" height="80"