Oncrete history Essay Example | Topics and Well Written Essays - 5750 words

Oncrete history - Essay ExampleIt is in the form of dark, and porous nodules that are ground using a small marrow of gypsum giving cement. Concrete this is a hard, compact material used for building, and is formed by a mixture of gravel, cement, water, and sand when they undergo hydration. Cure this is the act of tutelage concrete moist on the initial hardening. Deformation changing the dimensions of structures using a force. Dormancy period the period that concrete deems it workability. Elasticity The capability of materials to retain the original shape after getting stretched. Forms are the holders where concrete is placed during hardening. Hydration reaction of water with cement to form a cement paste. Mortar is a Cement paste that has been mixed with sand. Pozzuoli cement is a Volcanic rock powdered, used for making hydraulic cement. Portland cement this is a cement consisting mainly of atomic number 20 silicates react with water forming a hard mass. Workability this is how easily fresh concrete can be placed and consolidated in forms. 3.0 Text. 3.0. Introduction to Concrete. Concrete, can be defined as a composite material used in construction composed mainly of aggregate, water, and cement. It has several formulations, which give properties that tend to vary. This aggregate consists busted rocks or coarse gravel uniform granite or limestone this is mixed with new(prenominal) fine aggregate like sand. Cement, usually the Portland cement, and Cementitious materials like slag cement and fly ash are used as a binder in the aggregate. Many chemical admixtures may also be included in order to come up with these varied properties. Liquid normally water is added and mixed with this dry composite, this enables the concrete to be poured (shaped) before solidified...Cement, usually the Portland cement, and Cementitious materials like slag cement and fly ash are used as a binder in the aggregate. Many chemical admixtures may also be included in order to come up with these varied properties. Liquid normally water is added and mixed with this dry composite, this enables the concrete to be poured (shaped) before solidified and hardened to come up with a rock-hard strength through a process known as hydration. The liquid applied reacts with the cement, forming a bond with other components, finally forming a tough stone-like material. It has a comparatively high compressive strength, nevertheless much lesser tensile strength. It is against this that it is reinforced using other materials which are rattling strong in tension like steel. Processes that can damage the concrete include freezing of the trapped water.It is widely used in walls, pavements, brick/ block, foundation, bridges/ overpasses, footings for gates, and dismantle boats. Some of the most famous concrete buildings or structures are like the Burj Khalifa (worlds tallest building), the Panama Canal, the Hoover Dam, and the famous Roman Pantheon.