*2.1. Methods of Analysis*

A huge amount of dredged soil has been reclaimed in disposal areas that are mostly developed at new ports. There are three main disposal areas of dredged soil at Busan New Port, five at Incheon port, and three at Pyeongtaek-Dangjin Port, in addition to several others in various locations. The demand for the disposal area is continuously increasing around the areas developed at new ports, and the expansion of the existing disposal area is covered due to the expropriation of dredged soil. In this study, dredged soil was sampled at 23 dredged-reclaimed construction sites and laboratory tests were carried out using 23 samples. The sampling locations and construction sites are shown in Table 1 and Figure 1. The samples were separated into three regions: the Busan, Gwangyang, and Incheon regions.



**Figure 1.** Sampling locations: (**a**) the regions in Korea; (**b**) the Busan region; (**c**) the Gwangyang region; (**d**) the Incheon region.

Dredged soil is disposed of under disturbed conditions using different dredging methods. In particular, the pump-dredged method mostly used in Korea moves dredged soil with water into the disposal area after being totally disturbed. Therefore, in this study, experiments on engineering properties and centrifugal tests used disturbed samples. The sieve analysis, particle size analysis, soil classification system, and Atterberg limit test for 23 samples were performed by ASTM C136, ASTM D422, ASTM D2487, and ASTM D4318, respectively. The oedometer one-dimensional consolidation test and the constant rate of the strain (CRS) consolidation test followed ASTM D2435-11 and ASTM D4186-06. The CRS test is performed as strain rates of 0.04–0.001% per minute depending on the liquid limit of the soil, and the result is analyzed using the consolidation solution provided by Wissa et al. [12].
