Abstract
In present time, dredged marine soils (DMS) are generally considered as geo-waste in Malaysia. It is also known to contain high value of water and low shear strength. Lightly solidified soils such as soilcement slurry and flowable fill are known as controlled low strength materials (CLSM). On site, the CLSM was tested for its consistency by using an open-ended cylinder pipe. The vertical and lateral displacement from the test would determine the quality and workability of the CLSM. In this study, manufactured kaolin powder was mixed with different percentages of water. Cement was also added to compare the natural soil with solidified soil samples. There are two methods of flowability test used, namely the conventional lift method and innovative drop method. The lateral displacement or soil spread diameter values were recorded and averaged. Tests showed that the soil spread diameter corresponded almost linear with the increasing amount of water. The binder-added samples show no significant difference with non-binder sample. Also, the mixing water content and percentage of fines had influenced the soil spread diameter.
Highlights
Removal of dredged marine soils (DMS) from the sea bed is required in order to clear the passage way of ships
The soil spread diameter was influenced by the water content
The soil spread diameter increased with the increasing amount of moisture
Summary
Removal of dredged marine soils (DMS) from the sea bed is required in order to clear the passage way of ships. Soft and problematic soils like DMS posses low shear strength and high water content. The shear strength value of DMS is less than 50 kPa [2]. With such condition, any development made on top of this unimproved soil would risk with slope failure and non-uniform settlement. Transporting DMS to the designated dumping sites would cause monetary and environmental implications. With these reasons, DMS are likely to be disposed rather than to be reused
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