Call For Paper Volume:4 Issue:8 Aug'2017 |

Effect of Nano Silica and Steel Fiber on Properties of Concrete

Publication Date : 23/07/2015



Author(s) :

Ahmed S. Elboghdadi , Hala M. Elkady , Hamed M. Salem , Ahmed M. Farahat.


Volume/Issue :
Volume 2
,
Issue 7
(07 - 2015)



Abstract :

This study presents experimentally the combined effect of using nano silica (NS) and steel fibers (SF) on mechanical properties of hardened concrete. NS is used as partial cement replacement by 1, 1.5, 2, and 4 wt%, and SF is used as volume substitution by 0.45, 0.9, and 1.35%. Splitting tensile strength, modulus of elasticity and flexural strength are evaluated using different combinations between NS and SF. Significant improvement in the mechanical properties of concrete is observed on using NS due to its high pozzolanic activity confirming the formation of higher amount of C–S–H gel in the presence of nanoparticles. Optimum content of NS is 1.5 wt% improves splitting strength for samples with 0% SF, 0.45% SF, 0.9% SF and 1.35% SF about 35%, 41%, 66% and 72% respectively compared to samples without either NS or SF. Utilizing 2 wt% NS with 0.9% SF leads to improving modulus of elasticity about 94% compared to samples without either NS or SF. Flexural strength is doubled for samples of 2 wt% NS and 1.35% SF compared to samples without NS and SF.


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Effect of Nano Silica and Steel Fiber on Properties of Concrete

July 18, 2015