The Role of Carbonation in Modifying Flexural and Tensile Properties of Laterized Concrete

Laterized concrete, incorporating laterite soil, offers a sustainable alternative to conventional concrete in regions where traditional materials are scarce or expensive. This study investigates the impact of carbonation on the flexural and tensile splitting strengths of laterized concrete. Carbonation, a chemical reaction between CO2 and calcium hydroxide in concrete, forms calcium carbonate, enhancing the mechanical properties of concrete. This research focuses on various laterite replacement levels (0%, 10%, 20%, 30%, 40%, 50%) and their performance under different exposure conditions (carbonation, water immersion, dry environment). The results demonstrate that extended carbonation significantly enhances the tensile splitting and flexural strengths of laterized concrete up to 40% replacement, with the most substantial improvements at 10% to 30%. Higher replacement levels (30% and above) reduce these strengths, particularly in dry conditions. The findings underscore the potential of laterized concrete as an eco-friendly building material, balancing strength and sustainability. This study contributes to advancing sustainable construction practices, promoting the use of locally available materials, and mitigating environmental impacts.