Experimental studies on strength Durability and corrosion of concrete Using nano composite materials

Abstract

Present study discusses the role of nano-composite materials to newlineachieve mechanical, durable and corrosion resistance properties of high newlinestrength concrete mixtures. Silicon and calcium-based nano-composite newlinematerials such as nano-SiO2, nano-CaCO3 and nano-Ca(OH)2are replaced in newlinecement in various binary and ternary combinations by varying the dosage 2% newlineand 5% by weight. In addition to the strength performance, specific tests such newlineas water absorption, water sorptivity, permeability, density, coefficient of water newlineabsorption, acid penetration, rebar potential, impedance polarization, weight newlineloss and the LQR resistances have been further performed to investigate the newlineimpact on durability and corrosion resistance. newlineExperimental results showed that the mechanical properties of newlineconcrete mixtures have been enhanced (10% to 45%) due to the presence of newlinenano-materials at their optimum dosage. The optimum dosage of nanocomposite newlinematerials with cement in the ternary combination was found to be newline2% for enhanced mechanical performance. newlineHowever, higher durability results (5% to 60%) were achieved in newlinebinary combination with 2% replacement. The improved performance of newlinedurability and corrosion resistance was achieved due to the increased surface newlinearea of nano-composite materials, which stimulates both pozzolanic reactivity newlineand effective filling of voids in the concrete. newlineThe impacts of corrosion were analysed by measuring the rebar newlinepotential, impedance and polarization using embedded zirconium oxide newlinepotential sensor and surface-mounted electrode newline