Building Beyond Boundaries: Fuzzy TOPSIS for Sustainable and High-Performance Concrete Alternatives

India’s urbanization is rapidly increasing, with nearly twenty million dwellings built in metropolitan areas in the past three years. Concrete, used in large quantities, contributes to 9% of total greenhouse gas emissions. This study examines alternatives to concrete, including ferrock, ashcrete, timbercrete, hempcrete, and materials based on mycelium using Fuzzy TOPSIS methodology. Ferrock is the most suitable alternative for sustainable and high-performance buildings, as it exhibits commendable mechanical properties and reduces environmental harm. Ashcrete ranked second, has superior mechanical properties but falls short in general and environmental considerations. Timbercrete, third, uses recycled materials like sawdust, demonstrating significant value. Hempcrete and Mycelium-based materials occupy lower positions due to ongoing research aimed at enhancing their properties. The findings emphasize the importance of prioritizing mechanical properties and economic considerations over environmental and general aspects when pursuing sustainable alternatives. Businesses often prioritize client requirements over environmental and sustainable considerations, highlighting the need for further research to enhance essential properties in sustainable materials.