Stabilisation of crustal sand layer using biocementation technique for wind erosion control

Zomorodian, Seyed Mohammad Ali; Ghaffari, Hamideh; O’Kelly, Brendan C.

doi:10.1016/j.aeolia.2019.06.001

Cited by 77 publications

(25 citation statements)

References 17 publications

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“…They also found that the strength of sand treated with 10% CaCO 3 produced via MICP was 36.67% greater than that achieved for ordinary Portland-cementtreated samples. Several other recently published articles also highlighted the advantages of using MICP for soil treatment (Shahrokhi-Shahraki et al, 2015;Amin et al, 2017;Zomorodian et al, 2019b;Choi et al, 2020;Rahman et al, 2020;Soundara et al, 2020). The basic mechanisms of strength improvement achieved by the MICP treatment method are bio-cementation (binding of soil particles together via inorganic bio-cement) and bioclogging (filling of pore voids using the bio-cement) (Soundara et al, 2020;Assadi-Langroudi et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Geotechnical investigation of low-plasticity organic soil treated with nano-calcium carbonate

Kannan¹,

O’Kelly²,

Sujatha³

2023

Journal of Rock Mechanics and Geotechnical Engineering

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Section: Introductionmentioning

confidence: 99%

Geotechnical investigation of low-plasticity organic soil treated with nano-calcium carbonate

Kannan¹,

O’Kelly²,

Sujatha³

2023

Journal of Rock Mechanics and Geotechnical Engineering

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“…XRF showed an amorphous phase in MICP filler, which is supposed to be the purposely added silica. Previous studies have demonstrated that silica in the amorphous phase holds a higher specific surface area than that of crystal quartz, the former can more easily be combined with MICP product and bricks [ 37 ]. Ancient bricks were also found rich in silica as per the XRF analysis.…”

Section: Discussionmentioning

confidence: 99%

Microbial-Induced Carbonate Precipitation Improves Physical and Structural Properties of Nanjing Ancient City Walls

Gui

et al. 2021

Materials

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The preservation and restoration of heritage sites have always been of key focus in the field of cultural relics. Current restoration methods mainly involve physical or chemical techniques, which are in many cases intrusive, destructive, and irreversible. Hereby, we introduce a novel biological strategy (microbial-induced carbonate precipitation (MICP)) to repair natural and simulated surface cracks on six hundred years’ old wall bricks (part of the Nanjing City Min Dynasty ancient wall, China). X-ray micro computed tomography (X-ray micro-CT) was employed to non-destructively visualize the internal structure of the MICP-treated brick cubes. The results showed that MICP can effectively repair both natural and simulated cracks present on the brick’s surface. The compressive strength of the MICP-treated brick cubes was significantly higher than that of the untreated control cubes (33.56 ± 9.07 vs. 19.00 ± 1.98 kN, respectively). MICP significantly increased the softening coefficient and decreased the water absorption rate (p < 0.05), indicating that the water resistance of the wall bricks can be improved after treatment. The 3D images from X-ray micro-CT, a method that could non-destructively assess the internals of such cultural structures, showed that MICP can effectively repair ancient relics, promoting durability and limiting degradation without affecting the structure. X-ray diffraction analyses showed that MICP generates the same calcite form as that of original bricks, indicating that MICP filler is compatible with the ancient city wall brick. These findings are in line with the concept of contemporary heritage preservation.

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“…More recent 'technological development' attempts include the work of [115], who reported on staged injection of a cocktail of bacterial cell (S. pasteurii) and urea/ CaCl 3 solutions, using a pressure head, into two loose medium sands. For about 6% precipitated calcite and through a comparative experimental campaign, [116] proposed two injection cycles, each with aeration during injections and 24-h solution retention period, with a 6-day drained stage between cycles, and for 0.5 M cementation solution. In addition to baseline strength enhancement, the MICP technique has also been investigated as a technology for stabilisation of crustal layers and mitigation of wind-driven erosion.…”

Section: Microbial-induced Carbonate Precipitation (Micp)mentioning

confidence: 99%

Recent Advances in Nature-Inspired Solutions for Ground Engineering (NiSE)

Assadi-Langroudi

O’Kelly

Barreto

et al. 2021

Int. J. of Geosynth. and Ground Eng.

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The ground is a natural grand system; it is composed of myriad constituents that aggregate to form several geologic and biogenic systems. These systems operate independently and interplay harmoniously via important networked structures over multiple spatial and temporal scales. This paper presents arguments and derivations couched by the authors, to first give a better understanding of these intertwined networked structures, and then to give an insight of why and how these can be imitated to develop a new generation of nature-symbiotic ground engineering techniques. The paper draws on numerous recent advances made by the authors, and others, in imitating forms (e.g. synthetic fibres that imitate plant roots), materials (e.g. living composite materials, or living soil that imitate fungi and microbes), generative processes (e.g. managed decomposition of construction rubble to mimic weathering of aragonites to calcites), and functions (e.g. recreating the self-healing, selfproducing, and self-forming capacity of natural systems). Advances are reported in three categories of Materials, Models, and Methods (3Ms). A novel value-based appraisal tool is also presented, providing a means to vet the effectiveness of 3Ms as standalone units or in combinations.

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Stabilisation of crustal sand layer using biocementation technique for wind erosion control

Cited by 77 publications

References 17 publications

Geotechnical investigation of low-plasticity organic soil treated with nano-calcium carbonate

Geotechnical investigation of low-plasticity organic soil treated with nano-calcium carbonate

Microbial-Induced Carbonate Precipitation Improves Physical and Structural Properties of Nanjing Ancient City Walls

Recent Advances in Nature-Inspired Solutions for Ground Engineering (NiSE)

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