TY - JOUR
T1 - Modeling the behavior of compacted bentonites under low porosity conditions
AU - Navarro, Vicente
AU - De la Morena, Gema
AU - Gharbieh, Heidar
AU - González-Arteaga, Jesús
AU - Alonso, Juan
AU - Pulkkanen, Veli Matti
AU - Asensio, Laura
N1 - Funding Information:
The authors acknowledge funding support from (i) the Ministerio de Economía, Industria y Competitividad of the Spanish Government and the European Union through the project [ BIA2017-89287-R (AEI/FEDER, UE)], and (ii) the Dirección General de Universidades, Investigación e Innovación of the Castilla-La Mancha Government and the European Regional Development Fund of the European Union through the project [ SBPLY19180501000222 ].
Funding Information:
The authors acknowledge funding support from (i) the Ministerio de Econom?a, Industria y Competitividad of the Spanish Government and the European Union through the project [BIA2017-89287-R (AEI/FEDER, UE)], and (ii) the Direcci?n General de Universidades, Investigaci?n e Innovaci?n of the Castilla-La Mancha Government and the European Regional Development Fund of the European Union through the project [SBPLY19180501000222].
Publisher Copyright:
© 2021 The Author(s)
PY - 2021/11
Y1 - 2021/11
N2 - This article proposes an approach to ensure consistency between constitutive formulations used in double-porosity models when the macrostructural void ratio, eM, is very small. These formulations model processes of different physical natures and therefore are usually presented independently, in which case an additive decomposition is assumed, and they calculate the total strain of the system as the sum of the strains caused by each process. This independence means that when eM is reduced, the contributions considered are not always consistent. To solve this problem, soil stiffness in the proposed approach is increased when eM is reduced, and at the same time the effect on strain by macrostructural processes not linked to changes in stress is reduced. To simulate the flow, it is assumed that there is always a minimum operating value of eM that controls mass transport. This approach was applied to a practical case, and confirmed that when the effect of the stress state on microstructure behavior was taken into account, the conceptual framework initially proposed for non-negligible eM values was satisfactorily extended.
AB - This article proposes an approach to ensure consistency between constitutive formulations used in double-porosity models when the macrostructural void ratio, eM, is very small. These formulations model processes of different physical natures and therefore are usually presented independently, in which case an additive decomposition is assumed, and they calculate the total strain of the system as the sum of the strains caused by each process. This independence means that when eM is reduced, the contributions considered are not always consistent. To solve this problem, soil stiffness in the proposed approach is increased when eM is reduced, and at the same time the effect on strain by macrostructural processes not linked to changes in stress is reduced. To simulate the flow, it is assumed that there is always a minimum operating value of eM that controls mass transport. This approach was applied to a practical case, and confirmed that when the effect of the stress state on microstructure behavior was taken into account, the conceptual framework initially proposed for non-negligible eM values was satisfactorily extended.
KW - Compacted bentonite
KW - Double-porosity model
KW - Multiporosity
KW - Strains consistency
KW - Zero macrostructural void ratio
UR - http://www.scopus.com/inward/record.url?scp=85113156084&partnerID=8YFLogxK
U2 - 10.1016/j.enggeo.2021.106333
DO - 10.1016/j.enggeo.2021.106333
M3 - Article
AN - SCOPUS:85113156084
VL - 293
JO - Engineering Geology
JF - Engineering Geology
SN - 0013-7952
M1 - 106333
ER -