Effect of Nano Rice Husk Ash Against Penetration of Chloride Ions in Mortars

Document Type : Research Article


1 Concrete Technology and Durability Research Center, Department of Civil Engineering, Amirkabir University of Technology, Tehran, Iran

2 CAEE Department, Drexel University, USA

3 Civil Engineering Department, Manitoba University, Canada


These days, in the structural designing, the durability properties of materials should be considered as significant as the other specifications. Deterioration of concretes in corrosive environments leads to considerable costs in order to maintain the reinforced concrete structures. Usage of industrial pozzolans can improve quality and serviceability of concrete structures in such environments. Nowadays, one of the most common pozzolans in structural concretes is the rice husk ash (RHA) which enhances the mechanical and durability properties of concretes. In this paper, effects of nano RHA on chloride permeability, compressive strength, electrical resistivity and capillary absorption of mortars have been investigated. The results showed that the incorporation of RHA nanoparticles gradually increased the compressive strength. It was found that a partial replacement of cement by nano RHA would enhance the durability properties of mortars in the long-term.


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