Irma Aswani Ahmad, Noor Fadilah Romadhani, Muhammad Idhil Maming
—The problem in this research is the negative environmental impact of cement production and the decrease in concrete durability due to acid rain. This research aims to create an equation for the relationship between concrete’s mechanical properties and the concrete’s age in an acidic environment. This equation is used to predict the quality of green concrete produced according to the mix design and to measure the reduction in strength of green concrete in an acidic environment. The method used is experimental research with wet-dry acid rain simulations (a mixture of sulfuric acid and nitric acid solutions) in the laboratory using rice husk ash (RHA) as a cement substitute. This research uses 5% and 10% of RHA variations of cement weight and immersion in pH3 and pH4 acid solutions. The results showed that adding 5% RHA increased the compressive and flexural strength of concrete, both in normal and acidic environments, with a significant increase in concrete life up to 120 days. However, the addition of 10% RHA showed decreased performance in acidic environments, although it still provided benefits under normal conditions. The potential environmental and sustainability benefits of using RHA as a cement substitute are significant, as it can reduce CO2 emissions, overcome waste disposal problems, and increase the durability of green concrete in acidic environments. This finding provides an environmentally friendly and sustainable solution for the construction industry, especially in areas vulnerable to acidic environments (acid rain). IJASEIT is licensed under a Creative Commons Attribution-Share Alike 4.0 International License.
Department of Education of Civil Engineering and Planning, Universitas Negeri Makassar, South Sulawesi, Indonesia
