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http://dx.doi.org/10.7843/kgs.2011.27.9.047

Effect of Salinity on Mechanical Characteristics of Stabilized Dredged Soil  

Kim, Yun-Tae (Dept. of Ocean Engrg., Pukyong National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.9, 2011 , pp. 47-53 More about this Journal
Abstract
Marine dredged soils taken from navigation channels or construction sites of coastal area usually have a lot of salt in pores of clayey soils. This paper investigates effect of salt on mechanical characteristics of non-salt and salt-rich stabilized dredged soil. The stabilized dredged soil (SDS) consisted of dredged soil and cement. Several pairs of SDS with non-salt and salt-rich dredged soils, noted as N-SDS and S-SDS, respectively, were prepared to compare their strengths and compressibility characteristics. The microstructures, strength and compressibility characteristics of N-SDS and S-SDS specimens at 7 and 28 days of curing time were evaluated using scanning electronic microscope (SEM), unconfined compression test, and oedometer test. It was found that salt concentration of clayey soil affected not only the formation of soil structure but also the strength development of mixture. The compression index and swelling index of S-SDS were also greater than those of N-SDS, which indicated that the compressibility of mixture increased due to salt concentration. Salinity in clayey soil had a negative effect on the strength development and compressibility characteristics of stabilized dredged soils.
Keywords
Compressibility; Dredged soil; Salinity; Strength development;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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