Universiti Tun Hussein Onn Malaysia, Hong Kong (China)
Title: Reusing Dredged Marine Sediments for Sustainable Civil Engineering Applications
Dredged marine sediments are generally considered a waste material for disposal in designated dump site, either offshore, nearshore or inland. The disposal measures, which invariably incur additional costs, time and labour, both for transportation as well as construction of the disposal facilities. The apparent lack of sustainable values aside, there is always an underlying risk of contamination taking place along the transportation route as well as in the vicinity of the disposal sites with uncontrollable widespread propagation. On the other hand, taking into account the material being essentially soil-based, with the primary constituents of sand, silt and clay with some larger marine debris, it is perhaps most apt to harness its inherent properties as a ‘soil’ and reuse it as a geo-material. In civil engineering and construction terms, this would involve reusing the soils as backfill materials, for creating artificial land or restoring eroded ones in near-shore areas, for instance. Indeed, reuse of the marine geowaste simultaneously addresses the short and long term disposal issues, and contributes to the favourable practice of sustainable development in general. This lecture puts the recycling and reuse of dredged marine soils into practical engineering context, with a comprehensive review of the physical, chemical, biological and mechanical fundamental characteristics of the material, giving the ‘green’ exercise an all-round consideration for beneficial second lives.
Chee-Ming Chan is an Associate Professor with the Civil Engineering Technology Department, Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia. She is presently holding the office of Deputy Dean in Academic and Research at the Centre for Graduate Studies in the University. Her area of expertise includes geo-materials, engineering education and higher education improvement. More recently, Dr. Chan’s current work on dredged materials from Malaysian waters has gained momentum and support from the Ministry of Science, Technology and Innovation and Department of Marine, Malaysia. The primary focus of the endeavour is to characterize the region’s dredged sediments as well as to explore their reusability so as to minimize dumping and contamination / damaging risks of the marine ecosystem. She is also involved in professional bodies, including the Society for Engineering Education Malaysia (SEEM), Malaysian Geosynthetics Society (MyIGS), Institution of Engineers Malaysia (IEM), Board of Engineers Malaysia (BEM), and is an education quality auditor for the Malaysian Qualification Agency (MQA). From 2009-11, Dr. Chan served as a Postdoctoral Research Fellow at the Port and Airport Research Institute (PARI), Japan.