Effects of preloading on seawater erosion resistance of solidified soil

HE Jun; LI Wenjing; MEI Lifang; KANG Duoyun; ZUO Ziwei

doi:10.11779/CJGE2024S20041

Volume 46 Issue S2

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Chinese Journal of Geotechnical Engineering > 2024 > 46(S2): 247-252. > DOI: 10.11779/CJGE2024S20041

HE Jun, LI Wenjing, MEI Lifang, KANG Duoyun, ZUO Ziwei. Effects of preloading on seawater erosion resistance of solidified soil[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 247-252. DOI: 10.11779/CJGE2024S20041

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Effects of preloading on seawater erosion resistance of solidified soil

HE Jun^{1, 2,},
LI Wenjing^{1, 2},
MEI Lifang^{1, 2, ,},
KANG Duoyun^{1, 2},
ZUO Ziwei^{1, 2}

1.
School of Civil Engineering, Architectural and Environment, Hubei University of Technology, Wuhan 430068, China
2.
Key Laboratory of Health Intelligent Perception and Ecological Restoration of River and Lake, Ministry of Education, Hubei University of Technology, Wuhan 430068, China

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Received Date: June 21, 2024

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Abstract

Abstract

To reveal the effects of preloading and seawater erosion on the strength of solidified soil, the erosion simulations of soda residue (SR)-ground granulated blast furnace slag (GGBS)-carbide slag (CS) solidified soil subjected to different preloading levels are conducted. The unconfined compressive strength and X-ray diffraction tests are carried out, and the influences of the preloading level and erosion age are mainly discussed. The results show that with the increase of the preloading level, the strength of solidified soil increases first and then decreases. The strength of the solidified soil reaches its maximum at the preloading level of 40 % or 60%, but decreases under seawater erosion at the preloading level of 80%. When the preloading level is 60% and eroded by seawater for 120 days, the strength values of the SR-GGBS-CS solidified soil and cement solidified soil are 60 % and 84 % of the strength before erosion, respectively. High preloading and long-term seawater erosion generate large quantities of the secondary ettringite and hydrated calcium chloroaluminate, whose coupling effects lead to significant deterioration of the solidified soil.
- solidified soil,
- seawater intrusion,
- preloading,
- unconfined compressive strength,
- deterioration mechanism

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References

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