Experimental study of the effect of natural zeolite and nano-silica on the properties of self-compacting concrete cured in drinking water and sewage

Document Type : Original Article

Authors

1 Road Administration of the Markazi Province, Arak, Iran

2 Associate Professor, Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

3 Student PhD in Civil Engineering Management Management Structure Islamic Azad University, Qeshm, Qeshm, Iran

Abstract

The present study investigates the effect of using natural zeolite (NZ) and nano-silica (NS) on mechanical properties and durability of self-compacting concrete (SCC) in two drinking and sewage water environments. The durability of concrete, especially in corrosive hot areas, such as the southern coast of the country, is one of the major issues facing researchers. 16 mixing designs were made using drinking water and sewage and specimens were cured in both environments. Compressive strength at different ages, penetrability, water absorption and electrical resistance performed at 28 and 90 days ages. The results showed that 56-day strength of specimens containing 0.5%, 1.0% and 1.5% of NS, cured in sewage, had more strength than those cured in drinking water; in sum, NZ and NS improve strength of cured specimens in high alkalinity wastewater. In addition, the permeability at 28 days age for specimens containing 1.5% NS in and cured with drinking water, was at least as 4 mm and also for the specimens containing 1% NS and cured in the sewage, was minimum as 4.5 mm. In addition, water absorption of specimens containing 1% NS in both drinking water and sewage was the lowest; also, specimens containing different percentages of NZ showed higher electrical resistance than reference specimens cured in drinking water.

Keywords

Asas Journal
Volume 22, Issue 58
Spring 2020
May 2020
Pages 47-64

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History

  • Receive Date: 17 September 2019
  • Revise Date: 28 October 2020
  • Accept Date: 13 January 2021

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