This study aims to investigate the strength development of stabilized dredged marine using Basic Oxygen Furnace Steel Slag (BOS). Physical property tests of the dredged marine clay and BOS, and a flow value test and two types of strength test---Laboratory vane shear test and Unconfined compression test were performed in this study. Strength test result was analyzed in light of previous research, Cement-treated soil and an actual field test as a comparison study. An equation in estimating the early strength of stabilized soil from flow value was presented, it also implied that the stabilized soil using BOF slag had a different regression line from different stabilizers. Results and analysis suggested that the stabilized dredged marine clay using BOS shows a significant strength development within elapsed curing time, and it is divided into three different periods; an inactive period, a high acceleration period, and a moderate acceleration period.


Most countries with huge port traffic had to put an extra effort to manage the dredging of soil sediment and the disposal work to maintain navigable channels and ensure the safe passage of boats and ships. Thus, the necessity of a sustainable stabilizer to recycle the dredged marine clay has become a serious issue. A pre-treatment is required to utilize the dredged material since the dredged marine clay has high moisture content and highly compressible. Vast research (Tang et. al., 2001, Tsuchida et. al., 2007, Watabe et. al., 2011, Kang et al., 2016) had been performed on modifying and recycling the dredged material to minimize the disposal work and develop an economical geo-material. Although most studies indicated that the Portland cement had widely been used to stabilize the dredged material, it is a common knowledge that the Portland cement consumed much energy and money to be produced and utilized. Rubenstein (2012) claimed that the cement usage and production were also responsible for 5 percent of total carbon monoxide emitted around the world.

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