Regular dredging is necessary for the development of coastal regions and the maintenance of shipping channels. The dredging\nprocess dislodges sediments from the seabed, and the removed materials, termed dredged marine soils, are generally considered a\ngeowaste for dumping. However, disposal of the dredged soils offshores can lead to severe and irreversible impact on the marine\necosystem, while disposal on land often incurs exorbitant costs with no guarantee of zero-contamination. It is therefore desirable\nto reuse the material, and one option is solidification with another industrial waste, that is, steel slag. This paper describes the\nexploratory work of admixing dredged marine soil with activated steel slag for improvement of the mechanical properties. An\noptimumactivation concentration ofNaOHwas introduced to the soil-slag mixture for uniformblending. Specimenswere prepared\nat different mix ratios then left to cure for up to 4 weeks. The unconfined compressive strength test was conducted to monitor the\nchanges in strength at predetermined intervals. It was found that the strength does not necessarily increase with higher steel slag\ncontent, indicating an optimum slag content required for the maximum solidification effect to take place. Also, regardless of the slag\ncontent, longer curing time produces greater strength gain. In conclusion, steel slag addition to dredged sediments can effectively\nstrengthen the originally weak soil structure by both the ââ?¬Å?cementationââ?¬Â and ââ?¬Å?fillerââ?¬Â effects, though the combined effects were not\ndistinguished in the present study.
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