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Correlation Between Engineering Properties and Mineralogy of Clay Sediments in the Estuary of the Nakdong River  

Lee Sonkap (Department of Geology, Pusan National University)
Kim Jin-Seop (Department of Geology, Pusan National University)
Um Jeong-Gi (Department of Environmental Exploration Engineering, Pukyong National University)
Hwang Jin-Yeon (Department of Geology, Pusan National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.18, no.2, 2005 , pp. 93-107 More about this Journal
Abstract
The estuary of Nakdong River area including Noksan industrial complex and Busan New Port is composed of thick unconsolidified sediments containing abundant clay, and thus is a potential hazardous area of ground subsidence. We analyzed mineral compositions and geotechnical properties of the clay sediments that sampled from 4 boreholes of the area, and examined vertical variations and their correlations. The results showed correlations between some mineral constituents and geotechnical properties of clay sediments. A positive correlation showed between quartz content and wet unit weight, whereas a negative correlation showed between quartz content and liquid limit. Feldspar content and water content showed a negative correlation, whereas content of clay minerals and liquid limit showed a positive correlation. And also, there is a negative correlation between content of clay minerals and wet unit weight. Correlation equations are obtained from the multiple regression analyses among plastic index, content of clay mineral, smectite and clay fraction.
Keywords
clay; clay mineral; unconsolidified sediments; mineral composition; geotechical properties;
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