UNDRAINED SHEAR STRENGTH OF LOW DOSAGE CEMENTSOLIDIFIED DREDGED MARINE SOILS (DMS) FOR RECLAMATION WORKS

Abstract

The disposal of dredged marine soils (DMS) into the ocean or on land are unsatisfactory in
managing its large quantity which indicates a high demand on new ocean and land disposal. DMS are classified
as contaminated waste that contain of organic matter and heavy metals. Contaminated DMS can harm aquatic
organism, animals and human. It must be disposed safely to ensure the contaminants are not released. By
reusing the DMS as geomaterial or fill for reclamation works, it will minimize the impact to environment. The
treatment techniques towards DMS are an essential and necessary in enhancing its engineering properties and
assuring the effectiveness for a long-term solution. This paper presents a preliminary study in solidifying the
Kuala Perlis DMS (3.4 LL) with lowest dosage of cement (1 – 10 %) at different curing period (3, 7, 14 and 28
days). It shows the undrained shear strength (cu) value of cement-solidified were increased compare to the raw
DMS. The results for cement dosage above 7 % shows a good improvement in cu value and the strength
development were found increased after 3 days of curing. It was explained that the lowest water-cement (w/c)
ratio tend to have a higher cu value of the cement-solidified DMS.