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- W4221010648 abstract "Abstract Microbially induced calcium carbonate precipitation (MICP) is a nature-based soil stabilization technique, which has been developed for the past 20 years. Nevertheless, the application of the MICP method for stabilization of clays has received less attention in the literature as it is necessary to boost its effect in various ways to ensure its efficiency. Simultaneous use of the MICP method with natural nanomaterials can be a way to enhance the performance of MICP. In this study, the effect of nano-CaCO3 and nano-SiO2 on enhancing the MICP processes in a kaolinite clay is investigated. The nanomaterials and bacteria and cementation solutions were added to the host soil with different percentages. A series of unconfined compressive strength (UCS) tests was conducted to study the effect of nano-enhanced bio-cementation on soil strength after different curing times. Furthermore, the microstructure of the treated soils was investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Raman spectroscopy, chemical decomposition and X-ray diffraction (XRD) analyses. It was observed that the amount of calcium carbonate and UCS increased in all nano-bio-treated samples with curing time. SEM images of the modified samples showed that the soil texture becomes flocculated with the addition of nano-SiO2 with the MICP method and calcium carbonate was formed in the voids between the clay minerals, which increased the strength of the soil. XRD analyses and Raman spectroscopy confirmed the presence of calcium carbonate in the soil texture." @default.
- W4221010648 created "2022-04-03" @default.
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- W4221010648 date "2022-03-31" @default.
- W4221010648 modified "2023-10-16" @default.
- W4221010648 title "Application of Nature-Based Nanotechnology for Enhancing Biocementation in Clay by Microbially Induced Calcium Carbonate Precipitation" @default.
- W4221010648 doi "https://doi.org/10.21203/rs.3.rs-1509849/v1" @default.
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