Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Drained Shear Strength of MICP Sand at Varying Cementation Levels
Microbial induced calcite precipitation (MICP) is a novel ground improvement method to increase strength and stiffness of sand using natural biogeochemical processes. Cementation level and confining pressure are two important factors that control the behavior of MICP sand. The static mechanical responses of MICP cemented sand are systematically investigated using four cementation levels (untreated, lightly treated, moderately treated, and heavily treated) and three levels of confining pressure (100 kPa, 200 kPa, and 400 kPa). The experimental results indicate that the improvement in shear strength parameters is dependent on the level of cementation under peak and residual states. Uniformity of MICP cementation in laboratory scale is also discussed. When comparing the response of MICP sand with naturally cemented sand and artificially treated sand with portland cement, the MICP cemented sand is observed to better capture the small strain stiffness of the naturally cemented soil.
Drained Shear Strength of MICP Sand at Varying Cementation Levels
Microbial induced calcite precipitation (MICP) is a novel ground improvement method to increase strength and stiffness of sand using natural biogeochemical processes. Cementation level and confining pressure are two important factors that control the behavior of MICP sand. The static mechanical responses of MICP cemented sand are systematically investigated using four cementation levels (untreated, lightly treated, moderately treated, and heavily treated) and three levels of confining pressure (100 kPa, 200 kPa, and 400 kPa). The experimental results indicate that the improvement in shear strength parameters is dependent on the level of cementation under peak and residual states. Uniformity of MICP cementation in laboratory scale is also discussed. When comparing the response of MICP sand with naturally cemented sand and artificially treated sand with portland cement, the MICP cemented sand is observed to better capture the small strain stiffness of the naturally cemented soil.
Drained Shear Strength of MICP Sand at Varying Cementation Levels
Feng, K. (Autor:in) / Montoya, B. M. (Autor:in)
IFCEE 2015 ; 2015 ; San Antonio, Texas
IFCEE 2015 ; 2242-2251
17.03.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DRAINED SHEAR STRENGTH OF MICP SAND AT VARYING CEMENTATION LEVELS
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