Using silt soil as a raw material, the study aims to investigate the impact of curing age, type and content of the curing agent, and interfacial roughness on the shear mechanical properties of the silt soil-concrete interface. Concrete specimens and cured silt soil specimens were self-made and then subjected to shear mechanical testing using an indoor straight shear apparatus. The results indicate that: The type and content of the curing agent, as well as the curing age, affect the water content and degree of curing of the silt soil, thus influencing the interfacial shear mechanical behavior. Silt soil cured with SiO2 exhibited greater interfacial shear strength and cohesive strength compared to that cured with MgO under the influence of admixtures. The internal friction angle at the shear interface of the cured silt is largest at 12% MgO doping, followed by 12% and 6% SiO2 doping respectively, and is smallest at 6% MgO doping. An empirical formula of the shear hyperbolic type for the cured silt-concrete interface at different curing ages was established by incorporating the corrections made to the hyperbolic model.These results can provide valuable references for the design and construction of precast friction piles in soft soil areas.
Fan Xiang
,
Tian Xiaolong
,
Jiang Shaowu
,
Qiu Chang
,
Chen Rui
. Study on the Shear Mechanical Properties of Cured Silt-Concrete Interface[J]. Chinese Journal of Underground Space and Engineering, 2025
, 21(2)
: 540
-550
.
DOI: 10.20174/j.JUSE.2025.02.21
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