A series of laboratory tests were carried out to verify the strength characteristics of soil-cement improved by the biomineralization of microorganisms and to evaluate the utilizations of soil-cement mixed with oyster shell as an alternative aggregate. The higher the mixed oyster shell ratio, the lower the specific gravity and dry density. The mixing processes were more likely to change the liquid limit and plasticity index of the soil-cement into those for sand. The uniaxial compressive strength of soil-cement mixed with 20% oyster shell and 1 × 103 cells/mL of microorganisms satisfied the requirements of 3,000 kPa for seven days of curing in the Standard Specification for Public Works.

• 김진관 | Jin Gwan Kim
• 오민아 | Minah Oh
• 이명호(서울시립대학교 환경공학과) | MyungHo Lee (Department of Environmental Engineering, The University of Seoul)
• 이재영 | Jai-Young Lee Corresponding author