DefinePK

Abstract

Dredging is a process to excavate and remove sediments from the bottom of waterways and marine locations, such as ports and harbours. Dredging activities generate large volumes of dredged marine soils (DMS). DMS are the sediment and debris that were removed during the dredging process and are currently not being recycled. Solidification of DMS needs to be undertaken before the materials can be reused. Soil contamination has the potential to contaminate the ground and surface water through leachates that are produced from the contaminated sites. Synthetic precipitation leaching procedure (SPLP) was used in this study to predict contaminant leachability of the DMS. SPLP test was carried out for the solidified samples at different curing times i.e. 3, 7, 14, 28 and 56 days. It was found that the solidified DMS improved leachate properties of the DMS. Ordinary Portland cement (OPC) was used as a binder in this study and bottom ash (BA) used as granular admixture to solidified DMS. This gives further advantage to OPC-BA solidification of DMS in situ for the geo-environment perspective. Its shown that the solidified DMS can be used safely in actual construction field since it was not contaminated.