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- W2362505003 abstract "Seepage-induced internal erosion is commonly observed within hydraulic infrastructures like dams and levees. In this study, an emerging biogeotechnical technique - microbially induced calcite precipitation (MICP) is used for the internal erosion control in a sand-kaolin mixture. A series of seepage-induced erosion tests using a newly designed rigid-wall Plexiglas column was conducted for both untreated and MICP amended sand-kaolin mixtures. The hydraulic, physical and chemical responses of soils subject to seepage-induced erosion were monitored during the tests. It was found that hydraulic conductivity of MICP treated soils ranged from (1.0-3.0) 10-6 m/s, which was only slightly lower than untreated ones ((2.0-6.0) 10-6 m/s). The maximum value of change in porosity for MICP treated soils was 1.5%, which was substantially smaller than that of untreated samples (3.5%). The untreated soils were found to lose fine particle >35% more than the treated ones in terms of accumulative erosion weight under the same hydraulic conditions. It is speculated that the underlying mechanism is that MICP treatment bonds coarse particle contacts as well as absorbs/wraps fine particles, so that the buckling-resistance against strong hydrodynamic force is improved and preferential channels formation is delayed due to increased tortuosity." @default.
- W2362505003 created "2016-06-24" @default.
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- W2362505003 date "2014-01-01" @default.
- W2362505003 modified "2023-09-26" @default.
- W2362505003 title "Seepage-induced erosion control by microbially induced calcite precipitation: An experimental investigation" @default.
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