A Comparative Study of Bio-Cementation Techniques for Sustainable Geotechnical Sandy Soil Stabilization
摘要
Bio-cementation is becoming more popular in geotechnical and environmental engineering because to its sustainability and effectiveness. Microbially induced carbonate precipitation (MICP) binds soil particles with calcium carbonate minerals and fills pore spaces, improving soil quality. Low energy and carbon dioxide footprint distinguish bio-cementation from standard procedures. This research develops bio-cementation for sandy soil improvement employing injection, surface percolation, and premixing. Sporosarcina pasteurii, a ureolytic bacterium, was used to bio cement sandy soil. The results show that local sandy soil can precipitate bacterium calcite. The compaction test, California bearing ratio (CBR), unconfined compressive strength (UCS), and resilient modulus showed that all three treatments outperformed untreated soil. The maximum dry density data show that curing time is important for bacteria-treated soil in all three soil treatment methods. The surface percolation and premixing treatment outperformed injection for all geo technical soil stabilization features. For sandy soil, bio cementation can be used for sustainability.