Sulfuric acid's effects on the characteristics of regular Portland cement concrete under various environmental circumstances.

Abstract

An important component of environmental preservation and societal hygienic safety is the long-term resilience of sewage systems. As a result, engineers and authorities are highly concerned about the long-lasting performance of concrete sewer pipes. Acid resistance is a crucial factor in ensuring the sustainable quality of concrete used in sewage systems. In this paper, H₂SO₄ (a chemical) was utilized to investigate acid attack on concrete samples. The concrete samples were immersed in acid solution subjected to flowing and stagnant conditions having concentration of pH 1 and pH 2. Mass loss and strength loss studies were carried out. To demonstrate the survival of concrete in an aggressive environment (H₂SO₄) linear relation between acid concentration and degradation was established.  It was found that the formation of gypsum has proven beneficial in reducing the degradation of concrete under acid attack.