Complete information about Concrete What is concrete? Concrete is composed of three basic components: cement, water and aggregates ( sand, gravel , rock ) in varying proportions. Cement acts as a binder to join primary aggregate into a solid mass. Road Construction Equipments Water is required to chemically react with the cement (hydration) whereby the mixture solidifies. Note that cement is a component and contrary to popular belief, is not the same material. To define more simply: when the cement is mixed with the other ingredients, cement and water form a paste that glues the aggregates into a mass of solid rock particular call. By varying the proportions of water and cement is known as the water / cement ratio. The lower the ratio w / c, the stronger the concrete (and less porous). Change the proportions allowed to have varying strength, density and thermal resistance so that it works for the intended work. Types of concrete Ready Mix is manufactured in a factory or batching plant, according to a September recipe, and then delivered to the work. This results in a precise mixture and also allows the mixture to be developed specialty. But it also means less flexibility and a shorter lifespan. An alternative to ready-mixed concrete is the use of mobile concrete mixing trucks transporting the ingredients to produce in separate compartments. Once in the workplace, the ingredients are measured through calibration controls in the mixer that ultimately produces concrete. This results not only in the right mixture but also the correct amount the elimination of waste. Reinforced concrete is embedded with metal, usually steel. It can carry huge loads and has great versatility in large construction projects, including bridges and arches. Concrete signs of damage Curling or distortion at the edges and corners are concrete signs of damage. Temperature causes curling, moisture causes deformation. Blisters can occur when the mortar is separated from the concrete surface. In addition, the low points in particular will cause water to stagnate if there is no drainage. Surface cracks are an obvious sign of damage to concrete. Some may appear as secondary symptoms of other defects and may be difficult to diagnose correctly. Fine cracks or random cracks can be seen when the concrete is drying after being moistened. A click that occurs in a pattern of three points is usually caused by drying shrinkage. Big pattern cracking, called map cracking can be caused by an alkali - silica reaction in concrete.
The concrete surface may disintegrate as well, evidenced by the broken pieces, a formation of dust on the surface and mortar flaking and scaling. Other defects include discoloration and small or large holes in the vertical placement of concrete. Concrete repair and replacement jobs are for skilled contractors. Although it may take thousands of years, the concrete should be careful to get the best results.
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Concrete is composed of three basic components: cement, water and aggregates ( sand, gravel , rock ) in varying proportions. www.shitlaroad...