Acta Geotechnica, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 12, 2024
Language: Английский
Transportation Geotechnics, Journal Year: 2024, Volume and Issue: 46, P. 101235 - 101235
Published: March 29, 2024
Language: Английский
Citations
16
Water Resources Research, Journal Year: 2025, Volume and Issue: 61(1)
Published: Jan. 1, 2025
Abstract We document results of a set laboratory experiments aimed at exploring impacts injection rate and bacterial density on biomineralization across water‐saturated porous media. The study relies Low‐Field Nuclear Magnetic Resonance technology the ensuing transverse spin‐spin relaxation time distributions. latter is documented to provide robust quantification temporal histories pore size distributions during biomineralization. As such, our work explores quantifies pore‐size dependent three‐dimensional space. also provides quantitative analysis alterations in porosity permeability induced by biomineralization, together with (time‐averaged) rates volume change. A plugging ratio efficiency index introduced quantify strength pore‐size‐related Our reveal that induces significant distribution within medium, these changes being modulated rate. find CaCO 3 mainly precipitates macropores, consistent presence favorable local hydrodynamic conditions large surface areas therein. Precipitated found increase density. High densities amplify change macropores adequate contribute reduction. Otherwise, diminished mesopores micropores for highest considered.
Language: Английский
Citations
1
International Journal of Geomechanics, Journal Year: 2024, Volume and Issue: 24(5)
Published: Feb. 29, 2024
The soil–water characteristic curve (SWCC) model considering the temperature effect is significant in precisely predicting relationship between matric suction and degree of saturation unsaturated soils geotechnical geoenvironmental engineering. In this work, we derived a new temperature-dependent wetting coefficient, incorporating nonlinear enthalpy immersion per unit area. We introduce simplified expression that successfully approximates coefficient for temperatures 273.15 373.15 K. addition, propose equation SWCC model. comprehensively considers sensitivities water–air interface tension which shows an increase given leads to decrease saturation. results illustrate suitable nonisothermal soils.
Language: Английский
Citations
7
Géotechnique, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 13
Published: July 8, 2024
Microbially induced calcium carbonate precipitation (MICP) has emerged as a promising solution for geotechnical issues. However, the role of bacteria in formation (CaCO 3 ) remains incompletely understood. In this study, droplet microfluidic chip was developed to observe growth process and bacterial behaviour during MICP under various density conditions. Scanning electron microscope then utilised analyse morphology, Raman spectroscopy employed identify polymorphs. Nucleation within microspaces showed stochastic nature. Within droplets where crystals formed, all manifested cubic calcite. Higher led larger more irregularly shaped crystals, with crystal size showing significant correlation urease activity. no higher activity resulted amorphous on surface. pattern differed from monocrystalline carbonate. The results demonstrate that act primarily secretors regulate process, while their nucleation sites debatable. This study provides new insights into bio-induced mechanism.
Language: Английский
Citations
7
Journal of Geotechnical and Geoenvironmental Engineering, Journal Year: 2024, Volume and Issue: 150(10)
Published: July 25, 2024
Language: Английский
Citations
6
Géotechnique, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 12
Published: Aug. 5, 2024
Biomineralisation technology shows promise for sealing subsurface fractures, but understanding its microscale mechanisms in real rock fractures remains incomplete. In this study, a microfluidic chip incorporating slices was utilised to conduct enzymatically induced carbonate precipitation (EICP) experiments using one-phase continuous injection strategy. Real-time observations revealed grey flocs forming and clustering into aggregates susceptible transport by flow. Calcium (CaCO 3 ) crystals that formed on polydimethylsiloxane surfaces effectively filled bridged leading significant pressure drop. Rough can provide additional sites solute attachment heterogeneous nucleation of calcium carbonate. High velocities small apertures generally promoted floc formation reduced crystal growth. Precipitation content gradually increased with decreasing rate. Lower estimated efficiency obtained smaller, high-flow fractures. Precipitates interfaces eddies drops within narrow pore throats. Crystal growth displayed two-stage development: an initial increase followed decrease, varying across different facets (the or orientations the growing crystals). Growth competition will occur when two more neighbouring come contact diverse grain orientations. The findings valuable insights processes governing EICP contributing evaluation efficacy fracture applications.
Language: Английский
Citations
6
Transportation Geotechnics, Journal Year: 2023, Volume and Issue: 42, P. 101092 - 101092
Published: Aug. 22, 2023
Language: Английский
Citations
15
Acta Geotechnica, Journal Year: 2024, Volume and Issue: 19(10), P. 6683 - 6690
Published: April 26, 2024
Language: Английский
Citations
5
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 937, P. 173597 - 173597
Published: May 27, 2024
Language: Английский
Citations
4
The Analyst, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Microfluidic chip technology, an emerging interdisciplinary field, enables precise control of fluids at micro- and nano-scales is widely applied in biomedicine, chemical analysis, drug screening.
Language: Английский
Citations
0