Effect of Curing in Acidic Environments on the Strength and Permeability of Concrete Containing Nano-silica and Rubber

Document Type : Original Article

Authors

1 Faulty of technology and mining, Yasouj University, Choram,Iran

2 Department of Civil Engineering, Sepidan Branch, Islamic Azad University, Sepidan, Iran

3 Faculty of Technology and Mining, Yasouj University, Choram, Iran.

Abstract

In this paper, the effects of curing in acidic environments on the strength and permeability of concrete containing Nano-silica and crumbed rubber were investigated. For this purpose, 5, 10, and 15% of the fine aggregates of concrete were replaced with crumb tire, some of the concrete samples after demolding were immediately immersed in 5% sulfuric acid and some of them immersed in 2% hydrochloric acid. By replacing 5 and 10% of cement with Nano-silica the effect of using Nano-silica on this type of concrete were investigated for this aggressive condition. To investigate the short-term effect of acidic conditions on the properties of concrete, after 7 days of curing under acidic environmental conditions, compressive strength and water penetration depth under pressure is evaluated. The overall results show that the compressive strength of rubberized concrete decreased in an acidic environment and this decrease was more in sulfuric acid. For the samples containing 10% crumbed tire that cured in sulfuric acid and hydrochloric acid, the compressive strength ratio to the control sample was 0.79 and 0.92 respectively. The permeability also increased in a sulfuric acid environment and decreased in hydrochloric acid.

Keywords

Asas Journal
Volume 21, Issue 57
March 2020
Pages 72-81

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History

  • Receive Date: 16 October 2019
  • Revise Date: 01 September 2020
  • Accept Date: 21 October 2020

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