Analysis of the breakage of the bio-cementation generated on glass beadsduring a direct shear test using a DEM model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F24%3A43898613" target="_blank" >RIV/44555601:13440/24:43898613 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s40571-024-00803-1" target="_blank" >https://link.springer.com/article/10.1007/s40571-024-00803-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s40571-024-00803-1" target="_blank" >10.1007/s40571-024-00803-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of the breakage of the bio-cementation generated on glass beadsduring a direct shear test using a DEM model

Popis výsledku v původním jazyce

The improvement of soil behaviour by the bacterial precipitation of calcium carbonate has been extensively studied in geotechnical engineering. However, the evolution of bio-cementation bonds under shear conditions is only partially understood. This research presents a micromechanical approach to gain a deeper insight into the interaction between bio-cemented particles. A series of glass bead samples were treated with Microbial Induced Calcite Precipitation (MICP) and then subjected to direct shear tests. A calibrated model based on the Discrete Element Method was used to reproduce the macro-mechanical paths observed in the experiments, allowing the detailed analysis and description of the bond evolution at the microscopic scale in the treated samples. In general, it was found that a higher rate of bond breakage occurred before the peak shear strength was reached, and this was followed by a relatively constant rate of bond breakage associated with a macroscopic softening trend. Tensile stress was identified as the primary fracture mechanism. Finally, it was determined that the bond breakage mechanism is influenced by several factors, such as bond distribution, particle array, and the mechanical parameters of the bond.

Název v anglickém jazyce

Analysis of the breakage of the bio-cementation generated on glass beadsduring a direct shear test using a DEM model

Popis výsledku anglicky

The improvement of soil behaviour by the bacterial precipitation of calcium carbonate has been extensively studied in geotechnical engineering. However, the evolution of bio-cementation bonds under shear conditions is only partially understood. This research presents a micromechanical approach to gain a deeper insight into the interaction between bio-cemented particles. A series of glass bead samples were treated with Microbial Induced Calcite Precipitation (MICP) and then subjected to direct shear tests. A calibrated model based on the Discrete Element Method was used to reproduce the macro-mechanical paths observed in the experiments, allowing the detailed analysis and description of the bond evolution at the microscopic scale in the treated samples. In general, it was found that a higher rate of bond breakage occurred before the peak shear strength was reached, and this was followed by a relatively constant rate of bond breakage associated with a macroscopic softening trend. Tensile stress was identified as the primary fracture mechanism. Finally, it was determined that the bond breakage mechanism is influenced by several factors, such as bond distribution, particle array, and the mechanical parameters of the bond.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Computational Particle Mechanics

ISSN

2196-4378

e-ISSN

2196-4386

Svazek periodika

2024

Číslo periodika v rámci svazku

"necislovano"

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

20

Strana od-do

"nestrankovano"

Kód UT WoS článku

001278186100001

EID výsledku v databázi Scopus

2-s2.0-85199986376