The Influence of Moisture Content, pH and Liquid Limit on Electrokinetic-treated Dredged Marine Sediments Stability by using Calcium Chloride as an Enhancement Agent

Abstract

Reusing the dredged marine sediment (DMS) that was spawned from maintenance dredging work will reduce its disposal effect towards the environment. Furthermore, reusing the DMS could optimize the storage capacity of existing confine disposal facilities (CDF) and can prolonging its lifespan. Treating the DMS with an adequate pre-treatment is the best way to manage this sediment in sustainable solution. The purpose of this research is to study the influence of moisture content (w), pH and liquid limit (LL) towards the DMS’s stability after treated with electrokinetic (EK) method. Stainless steel plate was used as the electrode, while distilled water (DW) and calcium chloride (CaCli) were applied as the enhancement agents. The aforementioned enhancement agents are electrically injected into the DMS which causing flow of the solutions through the pores in DMS under 50 V/m of applied direct current. The EK-treated DMS shows increment in strength and it was influenced by w, pH and LL. The dry zone area was created near the anode and wet zone was created near the cathode. The application of CaCh create a better result in physical properties of DMS compared to pure systems. The EK-treated DMS hence could be reuse as a geomaterial in construction activities. Largely, EK has significantly improve the quality of DMS even though the strength increase observed was not homogeneous throughout the specimen.