Title : NEED BASED ADVANCEMENTS IN MAKING CONCRETE PRODUCTS
Authors : Satander Kumar
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Price : 250
Abstract : New advancements in concrete and cement-based products are completely changing the design and construction worlds. Many new technologies are changing the way we build and what we build with concrete. Reaching compressive strengths of concrete of more than 200 MPa in India, this new-age concrete also has very high tensile strength with or without the inclusion of steel/ synthetic fibers. Among special concrete, Self-Consolidating Concrete (SCC) eliminates the need of mechanical consolidation and yields a smooth surface finish without mix segregation. SCC and computerized precision color control are revolutionizing the precast industry. Shotcrete, vacuum process(dewatering) concrete, recycled concrete, delayed concrete, roller compacted concrete, high performance concrete, ultra-high performance concrete, smart concrete, high volume fly ash concrete, fibre reinforced concrete, early opening to traffic concrete pavement, joint- less rigid pavement, segment pushing technology, trenchless technology, use of construction and demolition (C&D) waste (Draft under preparation by MOEF, IS and IRC), fibre reinforced polymer (FRP) plate, pressure grouting technology for repair of distressed/honey combed concrete structures are gaining momentum these days. Advancement in equipment like digital/laser thermometer, distansometer, relative humidity meter, wind speed meter, small kits for rapid testing of water, liquids, soil aggregates etc. automatic steel bar cutting and bending machine are much advanced technologies being used in India. Evaluation of concrete road technologies viz, pullout test, Winder Probe test on hardened concrete etc., are also in use now. Geo-polymer (as per US Department of Transportation) can be mixed and hardened essentially like Portland cement which represents a game changing advancement, revolutionizing the construction of transportation infrastructure and the building industry. The paper thus describes new cost effective technologies for making need based good quality concrete structures, saving time and energy.