Concrete

**Concrete**

**Definitions** **// 1. 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 //**//2. Continuity //**//is the absence of joints.  **//5. Precast-concrete construction //**// is a 20th century development that //// 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. //  **//6. Prestressed concrete //**//is another invention of the 20th century which ////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 // 
 * 3. Reinforced Concrete** is a method of building in which metal is embedded by being set as a mesh into the forms before pouring the concrete. //
 * //4. Concrete-shell construction //**// is a 20th century development that ////<span style="color: black; font-family: 'Arial','sans-serif';">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. //

<span style="font-size: 9pt; line-height: 115%; font-family: 'Verdana','sans-serif'; mso-ansi-language: EN;"> <span style="font-family: Arial, Helvetica, sans-serif;">// **Precast Concrete, Tilt-up Construction and Titltwall**
 * Different Types of Concrete**

Precast Concrete, Tilt-up Construction and Titltwall are terms referred to nontraditional cement building processes. In which, Tilt-up and Tiltwall are synonyms used to describe the constructive method where the concrete wall panels are assembled by workers in the same site in which the building is going to be placed. This characteristic is what makes possible the creation of taller and bigger panels, though it cannot be done in cold weathers. This same reason is what differentiates this Tiltwall method with the Precast Concrete Process, where the concrete walls are fabricated at a manufacturing facility from which then, they have to be transported to the site where the building will be built. //