EFFECT OF AMORPHOUS SIO2 (nS) AND CARBON NANO PARTICLES ON MECHANICAL PROPERTY OF CONCRETE

Abstract

In the investigation the strength of M60 concrete with the use of Nano silica and in combination with Carbon nano tube (CNT) was used to study the mechanical properties. It has been reported that nano silica (nS) addition increases the compressive strength and reduces the overall permeability of hardened concrete due to the pozzolanic properties and Carbon nano tube have been provided High conductivity (being more than copper), elastic deformability, strength (being stronger than steel), surface chemistry, high stability. In this investigation cement replaced by Nano silica with 10%, 12% and 14% and carbon nano tube used 0.3% of cement content. To compare the results of cement replaced mixture, specimen without cement replacement are also casted. Performance of the various mixes is tested by the compressive strength, split tensile strength and flexure strength. A cube specimen of size 150mm X 150mm X 150mm, cylindrical specimen of size 150 mm dia X 300 mm high and beam specimen of size 150mm × 150 mm × 700mm were cast and demoulded after 24 hours then they allowed for normal water curing for 7 days and 28 days. The results show improvement in compressive strength, split tensile strength and flexural strength in cement replaced mixes.