Amirkabir Journal of Civil Engineering

Amirkabir Journal of Civil Engineering

Effect of Four Iranian Natural Pozzolans on Concrete Durability Against Sulfate Attack

Document Type : Research Article

Authors
Aliakbar Ramezanianpour 1
Seyyed Sajjad Mirvalad 2
Ehsan Aramoun 2
Mansour Peydayesh 3
1 Professor, Department of Civil and Environmental Engineering, Amirkabir University of Technology
2 M.Sc. Student, Department of Civil and Environmental Engineering, Amirkabir University of Technology
3 Lecturer, Department of Civil and Environmental Engineering, Amirkabir University of Technology
10.22060/ceej.2015.396
Abstract
Sulfate attack is one of the most important problems concerning the durability of concrete structures. Natural pozzolans are the natural mineral admixtures which can improve concrete durability against sulfate attack. In this paper, the sulfate resistance of concrete and mortar samples made from ordinary Portland cement containing three different portions of four types of natural pozzolans (Eskandan Pumice, Khash Pumice, Abyek Tuff and Jajrood Trass) was studied. Strength reductions and mass changes of the concrete samples, immersed in sodium sulfate solution, as well as the expansion of mortar prisms, immersed in sodium and magnesium sulfate solutions, were monitored. It was observed that the resistance of mixtures containing natural pozzolans was higher against both sodium sulfate and magnesium sulfate attacks compared to the reference cement.
Keywords
Sulfate Attack
Natural Pozzolan
Compressive Strength
Mortar Expansion
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