Application of bio-cementation to enhance shear strength parameters of soil-steel interface

Bak, Hamid Mortazavi; Kariminia, Tahereh; Shahbodagh, Babak; Rowshanzamir, Mohammad Ali; Khoshghalb, Arman

doi:10.1016/j.conbuildmat.2021.123470

Cited by 30 publications

(11 citation statements)

References 50 publications

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“…This step was taken to eliminate any soluble residues that may have remained due to the presence of the culture media in the soil. Finally, the samples were oven-dried for 24 hours before conducting direct shear tests to eliminate any effects of suction on the results [9,13].…”

Section: Methodsmentioning

confidence: 99%

“…Table 3 displays the logarithmic values of bacterial number and urease activity for the T1 to T9 experiments. Previous research has demonstrated that the TDOE method can predict outcomes with a satisfactory level of accuracy [13,66,70,71]. Table 3 also includes the predictions of the TDOE method, which were calculated using the Minitab software package [72] for full factorial test conditions, as well as the S/N ratios obtained using Eq.…”

Section: Imentioning

confidence: 99%

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Soil microbial improvement using enriched vinasse as a new abundant waste

Kariminia

Rowshanzamir

Abtahi

et al. 2023

Preprint

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This study proposes the use of vinasse, an inexpensive and readily available waste biopolymer, as a fundamental component of a waste culture medium that can enhance the effectiveness and cost-efficiency of the Microbial-Induced Calcite Precipitation (MICP) method for sustainable soil improvement. Vinasse enriched with urea, sodium caseinate, or whey protein concentrate is employed to optimize bacterial growth and urease activity using Taguchi Design of Experiments (TDOE) and statistical analysis. The results show that using the new culture medium yields a 91 times reduction in the cost of culture medium compared to conventional Nutrient Broth (NB) culture medium while improving soil shear strength parameters. Furthermore, the recycling of vinasse as a waste product can promote the progress of a circular economy and reduce environmental pollution. This study provides a promising approach to achieving cost-effective and sustainable soil improvement using waste biopolymers.

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Section: Methodsmentioning

confidence: 99%

Section: Imentioning

confidence: 99%

Soil microbial improvement using enriched vinasse as a new abundant waste

Kariminia

Rowshanzamir

Abtahi

et al. 2023

Preprint

Self Cite

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“…In the scientific literature, joints were modeled using spring or interface elements [27]. Joints are a special contact between the two surfaces with tangential and normal behaviors [28].…”

Section: Contact Surfacementioning

confidence: 99%

Numerical assessment of the influences of uplift pressure in joints on the seismic response of an arch dam having a jointed foundation

Mostafaei

Mashayekhi²,

Herath³

et al. 2023

NMCE

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Joints, which are usually located in the abutments of dams, play a vital role in the seismic stability evaluation of arch dams. This paper presents a comprehensive numerical investigation of the influence of uplift pressure in joints on the seismic response of an arch dam, with a focus on the interaction between the dam and the rock wedges. For this study, the Bakhtiari arch dam, having one rock wedge at each abutment, was chosen as a case study, and three distinct finite element models of the dam were developed. Three components of El Centro were applied to the dam's foundation, and the influences of dam-rock wedge interaction on the crest displacement time history and tensile damage of the arch dam were investigated. Four different scenarios were taken into account. The results indicated that taking uplift pressure in joints into account has important effects on the dam responses.

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“…These reactions lead to the precipitation of calcium carbonate in soil. In this method, the microbially induced urease enzyme catalyzes the urea hydrolysis producing ammonium and carbonate ions (Equation 1) [17][18][19][20][21]:…”

Section: Introductionmentioning

confidence: 99%

Non‐ureolytic microbially induced carbonate precipitation: Investigating a cleaner biogeotechnical engineering pathway for soil mechanical improvement

Hemayati,

Nematollahi,

Nikooee

et al. 2024

The Journal of Engineering

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As the world's population grows, there is an increasing need for soil improvement techniques to accommodate construction demands. Current methods, most often, suffer from a high CO2 footprint, leading researchers to resort to biological methods of soil improvement through microbially induced carbonate precipitation (MICP). Commonly used ureolytic microbial carbonate precipitation produces ammonium ions, which can be environmentally concerning. The present study, therefore, addresses the use of non‐ureolytic MICP for soil improvement. The process of non‐ureolytic MICP relies on the use of heterotrophic bacteria to catalyze the oxidation reaction of organic compounds, eventually calcium carbonate precipitation. In this study, heterotrophic bacteria, such as Bacillus subtilis and Bacillus amyloliquefaciens, have been investigated as a solution for soil improvement via an ammonium‐free MICP. Calcium formate and calcium acetate are used as both calcium and carbon sources. This study, furthermore, examines the impact of MICP treatment on sandy soil and the effect of compaction level on treated samples. The findings indicate that the non‐ureolytic MICP method is an effective approach for stabilizing sand. The Calcium Formate‐B.Subtilis composition is shown to be the most effective compound for improving the unconfined compressive strength of sandy soils, while the Calcium Acetate‐B.Amyloliquefaciens composition is the least effective.

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Application of bio-cementation to enhance shear strength parameters of soil-steel interface

Cited by 30 publications

References 50 publications

Soil microbial improvement using enriched vinasse as a new abundant waste

Soil microbial improvement using enriched vinasse as a new abundant waste

Numerical assessment of the influences of uplift pressure in joints on the seismic response of an arch dam having a jointed foundation

Non‐ureolytic microbially induced carbonate precipitation: Investigating a cleaner biogeotechnical engineering pathway for soil mechanical improvement

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