Experimental research on temperature – Dependent dynamic interface interaction between marine coral sand and polymer layer.

The high-temperature climate, dynamic stress loading and soil particle dimension have non-negligible influence on the interface interaction between marine coral sand and polymer layer, which determines the stability of coral sand engineering facilities installed with polymers. However, currently, the relevant research is rare. In this paper, by using the self-developed large temperature-controlled interface dynamic shear apparatus, a series of cyclic shear tests were conducted on the interfaces between polymer layer and coral sand with the particle size range of 1 mm ∼ 2 mm (S1 coral sand) and 2 mm ∼ 4 mm (S2 coral sand) in the temperature ranging from 5 °C to 80 °C. The experimental results indicate that, from 5 °C to 60 °C, the peak shear strength, dynamic shear stiffness and damping ratio rise, while from 60 °C to 80 °C, the decline of the mechanical parameters occurs. Also, temperature has more significant influence on the dynamic mechanical properties of S1 coral sand interfaces than that of S2 coral sand interfaces. Additionally, except for 60 °C, the peak shear strength, dynamic shear stiffness and damping ratio of S1 coral sand interfaces is all higher than that of S2 coral sand interfaces in other test temperature. • A series of temperature-controlled cyclic shear tests were conducted on coral sand interfaces. • The influence of temperature on the dynamic interface interaction was investigated. • The influence of soil particle size on the dynamic interface interaction was investigated. [ABSTRACT FROM AUTHOR]