• JAYANTHI M
• Dr. K. REKHA

This review paper investigates the incorporation of titanium dioxide (TiO2) into concrete, emphasizing its photocatalytic capabilities that contribute to mitigating air pollution and enhancing overall air quality. The integration of TiO2 not only improves environmental conditions by catalyzing the degradation of nitrogen oxides (NOx) and volatile organic compounds (VOCs) into non-toxic byproducts but also strengthens the mechanical and durability aspects of concrete structures. Additionally, the study examines the sustainable practice of partially substituting fine aggregates with foundry sand a waste product of the metal casting process aiming to enhance material efficiency and promote waste utilization in construction. The paper critically analyzes current literature focusing on the mechanical behavior, durability and photocatalytic effectiveness of TiO2 modified concrete, considering key parameters such as compressive and flexural strength, as well as resistance to environmental factors. While the advantages of TiO2 enhanced concrete are promising, challenges remain, particularly regarding the consistency of photocatalytic performance over time, variability in structural properties, and the cost-effectiveness of widespread application. This review identifies existing research gaps and proposes directions for future development, particularly through the integration of foundry sand, to advance both environmental sustainability and structural performance in concrete applications.

Titanium dioxide, Foundry sand, Sustainability and Air pollution

"Review on Smog Mitigation Using Photocatalytic Concrete with Partial Replacement by Foundry Sand", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 7, page no.d839-d848, July-2025, Available :http://www.jetir.org/papers/JETIR2507398.pdf

"Review on Smog Mitigation Using Photocatalytic Concrete with Partial Replacement by Foundry Sand", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 7, page no. ppd839-d848, July-2025, Available at : http://www.jetir.org/papers/JETIR2507398.pdf