Abstract
Fine rock powder and rice husk ash are residues generally discarded in the environment, causing environmental problems. This study investigated the durability of concretes containing rice husk ash and two rock powders, partially replacing cement when exposed to organic acids. Four types of concrete were manufactured and immersed in acetic acid and lactic acid solutions. The concretes with these mineral additions exhibited better durability and lower mass loss than the reference concrete. The resistance to acids increased with decreasing CaO content. Concretes containing the mineral additions showed better resistance to acid corrosion than Portland cement concrete.
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