Dynamic Shear Strength Characteristics of Lightweight Sand-EPS Soil

Liping Zhu, Kejun Wen, Ruiming Tong and Mingdong Li
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Liping Zhu: School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, China
Kejun Wen: Department of Civil and Environmental Engineering, Jackson State University, Jackson, MS 39217, USA
Ruiming Tong: Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
Mingdong Li: School of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, China

Sustainability, 2022, vol. 14, issue 12, 1-9

Abstract: Lightweight sand–EPS soil (LSES) is regarded as a kind of sustainable geomaterial for providing a way to reutilize fast-growing waste expanded polystyrene (EPS) packages. It is usually applied in marine geotechnical engineering to solve the excessive settling of soft ground or bumps at bridge heads due to its merits such as low density, high strength, and adjustability. Aiming to investigate the dynamic shear strength of LSES made from marine sand, a series of laboratory dynamic triaxial experiments was conducted on LSES with different proportions and control sand (CS). The influences of cement content, EPS bead content, and confining pressure on dynamic shear strength were analyzed, as were comparisons with the material sand. It was found that the dynamic strength of LSES increased with the increase in cement content and confining pressure. The bonding function of cement hydration products contributed to the dynamic strength of LSES; however, the work required a certain content of cement. The dynamic strength of LSES decreased with the increase in EPS bead content due to the low particle strength and smooth surface of EPS beads. The cyclic number of failure ( N f ) of both LSES and CS decreased linearly with the increase in dynamic shear stress in semilogarithmic coordinates. Both the slopes and the intercepts increased with the increase in cement content and confining pressure. However, they decreased with the increase in EPS bead content.

Keywords: lightweight soil; dynamic strength; sand; EPS beads; cohesion; friction angle (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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