Journal of Engineering and Applied Sciences

Year: 2017
Volume: 12
Issue: 6
Page No. 1463 - 1473

Increasing the Durability and Reliability of Self-Compacting Concrete (SCC) Using Nano-Silica and Pozzolanic Materials in the Salt Environment

Authors : Behnod Barmayehvar

Abstract: Through the expansion of concrete in Persian Gulf Region and short-term burnout of existing constructs considering critical and corrosive situation of this region, civil engineers and specialties are sought to improve concrete production in civil infrastructures in Persian Gulf using nano materials. Nano technology in recent years has drawn many attentions of researchers and scientists and its reason is using nanoparticles and their unique physical and chemical characteristics. On one hand, the cement is a material that sticks the parts of concrete and is used widely in construction projects. On the other hand considering its needs whether in terms of rigidity, strength, durability and high performance as well as corrosion of armatures in concrete due to the influence of chloride ions which is called as one of the durability and sustainability of reinforced concrete structures, concrete industry is one of Nanostructure material important users. This study has been written in order to improve the performance of Self-Compacting Concrete (SCC) using nano-silica in environmental situation of Persian Gulf (corrosive) three total plans including self-compacting concrete, self compacting concrete containing nano-silica and pozzolanic materials (micro-silica, fly ash and limestone powder) and their results were analyzed after placing in two situations of corrosive and aqua (salty Persian Gulf). For investigating the performance of mixtures above, the characteristics such as bending and compressive strength, the amount of expansion, contraction, water absorption, ultrasonic, electrochemical corrosion potential, penetration of chloride ion and the electrical resistance of examples located in ordinary water and salt destructive environmental situation of Persian Gulf and pseudo Persian Gulf with almost 5% of salt for 180 days have been investigated. Based on obtained results from the experiments, nano-silica improves the mechanical characteristics of self-compacting concrete such as bending compressive strength and durability against corrosive environments. In plans containing nano-silica and pozzolanic materials, it was observed that mentioned samples have better characteristics than the samples with mere nano-silica. Within this, the plans containing nano-silica and micro silicashowed better strength results besides concrete durability than other samples in salt destructive situation of Persian Gulf like Persian Gulf.

How to cite this article:

Behnod Barmayehvar , 2017. Increasing the Durability and Reliability of Self-Compacting Concrete (SCC) Using Nano-Silica and Pozzolanic Materials in the Salt Environment. Journal of Engineering and Applied Sciences, 12: 1463-1473.

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