Abstract New sustainable ground improvement techniques have been recently required for applications in onshore and offshore geotechnical structures. The Microbiological Induced Calcite Precipitation (MICP) method is a ground improvement technique that results from a natural biogeochemical process in order to create a soil cemented framework. The biocementation resulted from this method has been shown to produce a reasonable increment in soil’s mechanical properties such as strength and stiffness. This study focused on evaluating the mechanical behavior of a biocemented uniform sand by using the MICP method. Three different cemented levels were produced in a laboratory scale by varying the amount of a chemical solution (cementation solution) percolated through the specimens. The experimental outcome from a set of triaxial tests performed at three different confining pressures (100?kPa, 200?kPa, and 400?kPa) demonstrated that the MICP method produced an increment in strength with a peak in the deviatoric stress when compared to the uncemented soil, changing the cohesion intercept from nearly 0?kPa to 75?kPa. Furthermore, the stress-dilatancy response indicated that a fully structural degradation is achieved at large plastic strains, differently from what is usually observed in chemically artificially cemented blends, like soil–cement and soil–lime.
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