Concrete

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Concrete is a composite construction material, composed of cement and other cementitious materials such as fly ash an slag cement. Concrete is one of the most popular materials used for buildings because of its resistance and fire-and-waterproof properties. Since concrete has a great plasticity, there are many construction methods that use this material in different ways. ======

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 The following page is dedicated to the studies of concrete as a construction material obtained from the experiment results of the Materials Lab, the information given in audio and readings and web research. There are also posted asigments that will help understand and illustrate the differences between some concrete-construction methods. ======

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 **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 ======

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 **Pozzolana** is a volcanic-ash cement used by the ancient Romans to fabricate concrete. ======

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 **Reinforced concrete** is a construction material to make large variety of construction members that was invented by Joseph Monier wih the purpose of adding the tensile strengh of steel to the compressive strengh of mass concrete by embedding the metal and shaping it into the desired form befored pouring the concrete in it. ======

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 **Concrete-shell construction** is a building method that 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. ======

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 **Precast-concrete construction** is a building method that employs construction members prefabricated under optimal factory conditions to increase waterproofing and solidity, to decrease time and cost in eretion, and to reduce expansion and contractions. ======

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 **Prestressed concrete** is a construction method that provides bearing stressed members into which reinforcement is set under tension to produce a live force to resist a particular load. It is mostly used to create bridge supports and girders. ======

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Tilt-up wall and tiltwall are two terms used to describe the same process. The wall panels are created at the jobsite by pouring the material (concrete) into molds assembled at the same place. The biggest problem of this construction method is that the assembly of the panels is completly exposed to weather conditions. The main difference in the design of houses assembled by tilt-up constrcution in southern and northern regions is the size of the walls. Tilt-up and tilt wall constructions are two different names for the same method of construction using concrete. The main difference between tilt wall and precast concrete construction is the assembly and fabrication of the concrete panels. While tilt-up method creates the panels at the place of construction, the precast concrete method manufactures the panels in a facility from where they'll be transported. ======