A Constitutive Model to Simulate Cementation Effects in Sands
Publication: Geo-Congress 2023
ABSTRACT
Naturally cemented sands exhibit heightened mechanical properties compared to clean sands as a result of the action of crystal binders that strengthen the structure of such materials. Based on this observation, a myriad of ground improvement techniques such as bio-cementation and polymerization have been developed to artificially cement sands. Despite such techniques finding increasing applications, a handful of constitutive models remain available to capture their effects on the mechanics of sands. To advance the state of the art, this article describes a constitutive model for capturing the mechanics of cemented sands: SANISAND-C*. This work specifically focuses on a succinct overview of the mathematical formulation of such model and its application to the simulation of drained and undrained triaxial compression tests of cemented and clean sands. Results indicate that the model can realistically reproduce multiple effects caused by the natural or artificial cementation of sands, such as their increased strength and stiffness, changes in dilatancy, and the destructuration of cementation bonds upon mechanical loading. Accordingly, the model represents a powerful tool for computational analyses involving cemented sands for both scientific and engineering purposes.
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Geo-Congress 2023
Pages: 393 - 401
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Published online: Mar 23, 2023
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