1-D COMPRESSIBILITY PARAMETERS OF LIGHTLY SOLIDIFIED DREDGED MARINE SOIL (DMS) USING CEMENT, GGBS AND COARSE SAND

Abstract

A consistent dredging is essential for the development along the coast and the maintenance of
shipping routes. The dredging operation dislodges sediments from the seabed, and the retrieved materials,
termed dredged marine soils, are considered a geowaste for dumping. Therefore reusing the material will
benefit the civil sectors, and one option is solidifying with other materials, which are, cement, ground
granulated blast furnace slag (GGBS) and sand. The present investigation is on a dredged marine soil (DMS)
from Kuala Perlis state in Malaysia where in a laboratory study was undertaken to contemplate the
compressibility characteristics of DMS with cement, GGBS and sand admixtures. Cement is the major
constituent of concrete which is produced by natural raw materials like limestone rock, clay and chalk etc.
These are produced by blasting quarries. Industrial wastes like Ground Granulated Blast Furnace Slag (GGBS)
show chemical properties similar to cement. An attempt was made to understand the influence of cement plus
GGBS as binder and sand as a granular material by studying the improved settlement rate of consolidation.
The results showed that the optimum binder content was from 3C7G_20 specimen and when sand was added
to it, it present that settlement decreased with increasing sand content. Binder combinations involving ratio of
cement to GGBS of 3 to 7 with addition of sand were effective in improving the settlement and consolidation
rate when compared to the performance of cement alone as binder.