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STUDY OF HIGH PERFORMANCE CONCRETE USING NANOSILICA AS AN ADMIXTURE-A REVIEW
Ashwini K.* and Dr. Srinivasa Rao P.
High performance concrete(HPC) use in present days is increasing as conventional concrete does not meets the requirement. Hence it is necessary to develop HPC. For the production of HPC, the pozzolanic materials (silica fume, ground granulated blast furnace slag, fly ash) are widely utilized. Nevertheless, the new developments of nanotechnology guarantee that various forms of nano sized silica can be produced, which have higher purity and specific surface areas which could more effectively promote the strength development of concrete, compared to the other pozzolanic materials. In recognition of its importance, many researchers have attempted to investigate the effect of nanosilica on the mechanical properties of HPC. These researchers during their investigation used nanosilica of different sizes and combination of materials like silica fume, ground granulated blast furnace slag, fly ash, metakaoline etc. to prepare concrete of different grade and tested for workability, compression strength, split tensile strength and flexural strength. The other tests that were conducted was durability properties like; acid resistance, %weight loss, durability factors, rapid chloride permeability test, abrasion resistance, water permeability etc. the analysis of these investigations and their results are reviewed and presented in this paper.[Full Text Article]