The Advantages And Uses Of Self-Compacting Concepts

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SELF COMPACTING CONCRETE Self-compacting concrete (SCC) is a flowing concrete mixture that is able to consolidate under its own weight. The highly fluid nature of SCC makes it suitable for placing in difficult condition & in selections with congested reinforcement. Use of SCC can help in hearing related damages on the worksite that are induced by vibration of concrete, another advantages of SCC is that the time required to place large section in consider ability reduced. When the construction company in Japan experienced a decline in the availability of skill labour in the 1930's a need for felt for a concrete that could overcome the problem of defective workmanship. SCC mainly used in highly congested reinforced concrete …show more content…

For examples, placement of seal concrete, mass concrete and shaft concrete can be successfully placed without vibration. These seal, mass and shaft concretes are generally of lower strength, less than 34.5 MPa and difficult to attain consistent quality. Modern application of self-compacting concrete (SCC) is focused on high performance and more reliable quality, dense and uniform surface texture, improved durability, high strength, and faster construction. By the early 1990's, Japan has developed and used SCC that does not require vibration to achieve full compaction. More and more applications of SCC in construction have been reported in Japan. As of the year 2000, the amount of SCC used for prefabricated products (precast members) and ready-mixed concrete (cast-in-place) in Japan was about 400,000 …show more content…

Super plasticizer and air entraining admixtures give the required deformability.
• Viscosity agent type self-compacting concrete: This type is proportioned to provide self-compaction by the use of viscosity modifying admixture to provide segregation resistances. Super plasticizer and air entraining admixture are used for obtaining the desired deformability.
• Combination type self-compacting concrete: This type is proportioned so as to obtained self-compact ability mainly by reducing the water-powder ratio, as in the powder type, and a viscosity modifying admixture is added to reduce the quality fluctuation of the fresh concrete due to the variation of the surface moisture content of the aggregates and their gradations during the production. This facilitates the production control of the concrete.
1.3 MERITS
1.3.1 SCC has proved beneficial because of number of factors including
• Faster construction.
• Reduction in site man power.
• Better surface finishing.
• Improve

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