Enzyme-induced carbonate precipitation on concrete crack repair

• Main Author: Goh, Charlize Yun Fang
• Other Authors: Yang En-Hua
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Engineering
• Online Access: https://hdl.handle.net/10356/181688
• Institution: Nanyang Technological University

This report explores the feasibility of Enzyme-Induced Calcium Carbonate Precipitation (EICP) as a sustainable method for concrete crack repair. Utilizing soybean-derived urease, the method promotes eco-friendly and cost-effective calcium carbonate deposition. Key experiments assessed the influence of settling time, solution retention, and application techniques on EICP's performance. Results indicated that overnight solution retention and effective containment notably enhanced crack sealing and water impermeability, while a 10-minute settling time improved calcium carbonate deposition consistency. Despite promising outcomes, challenges such as uneven deposition in larger cracks and enzyme stability require further investigation. Future research should focus on alternative carrier materials, enhanced enzyme stabilization, optimized retention strategies, and advanced application methods. The findings support EICP's potential to improve structural serviceability and foster sustainable construction practices.