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The effective parameters on the behaviour of treated sands by microbial-induced calcite precipitation under undrained triaxial test

Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Nowadays, geotechnical specialists are focused on reinforcing soil engineering parameters using innovative and environmentally friendly methods. Microbial-Induced Calcite Precipitation is a ground improvement method for modifying soil strength, permeability, and stiffness; therefore, it can be vital to study the effective factors on the technique’s efficiency and cost reduction. This study examined how biologically treated sands subjected to undrained triaxial loading responded to simultaneous changes in cementation solution molarity, optical density (OD600), and curing time. The triaxial experiments showed that the strength increased with the rise in the mentioned parameters. While the solution molarity and optical density had the highest and lowest effect on the soil improvement process, respectively, the optical density role was considerably low when the molarity was high. Increasing the molarity of the cementation solution resulted in a 45% increase in the peak stress ratio, while the optical density and curing time were constant. On the other hand, similar behaviour of dense sand and change in the response of cemented soil from strain-hardening to strain-softening were other notable observations of this study. In addition, the peak stress ratio at low strains increased with increasing the cementation level and then decreased to close to the amount of untreated sand with increasing strain.
Rocznik
Strony
55--69
Opis fizyczny
Bibliogr. 34 poz., fot., rys., wykr.
Twórcy
  • Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
  • Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
  • Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
Bibliografia
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  • [21] K. Wen, Y. Li, S. Liu, C. Bu, L. Li, Development of an improved immersing method to enhance microbial induced calcite precipitation treated sandy soil through multiple treatments in low cementation media concentration. Geotechnical and Geological Engineering 37 (2), 1015-1027 (2019). DOI: https://doi.org/10.1007/s10706-018-0669-6.
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  • [25] X. Wang, C. Li, W. Fan, H. Li, Reduction of Brittleness of Fine Sandy Soil Biocemented by Microbial-Induced Calcite Precipitation. Geomicrobiology Journal 1-13 (2022). DOI: https://doi.org/10.1080/01490451.2021.2019858.
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  • [31] H. Lin, M.T. Suleiman, D.G. Brown, E. Kavazanjian, Mechanical behavior of sands treated by microbially induced carbonate precipitation. Journal of Geotechnical and Geoenvironmental Engineering 142 (2), 04015066 (2016). DOI: https://doi.org/10.1061/ (ASCE)GT.1943-5606.0001383.
  • [32] T. Sasaki, R. Kuwano, Undrained cyclic triaxial testing on sand with non-plastic fines content cemented with microbially induced CaCO3. Soils and Foundations 56 (3), 485-495 (2016). DOI: https://doi.org/10.1016/j.sandf.2016.04.014.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-98320c20-02bf-4a42-ac19-b2e1b190b559
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