Siham Kamali, Fabrice Bernard, Edine Abriak Nor, Patrick Degrugilliers
Civil and Urban Engineering Department, Institut National des Sciences Appliquées, 20 Avenue des Buttes de Coësmes, 35043 Rennes Cedex, France.
Waste Manag. 2008;28(5):919-28. doi: 10.1016/j.wasman.2007.03.027. Epub 2007 Sep 10.
Large volumes of sediments are dredged each year in Europe in order to maintain harbour activities. With the new European Union directives, harbour managers are encouraged to find environmentally sound solutions for these materials. This paper investigates the potential uses of Dunkirk marine dredged sediment as a new material resource for road building. The mineralogical composition of sediments is evaluated using X-ray diffraction and microscopy analysis. Since sediments contain a high amount of water, a dewatering treatment has been used. Different suitable mixtures, checking specific geotechnical criteria as required in French standards, are identified. The mixtures are then optimized for an economical reuse. The mechanical tests conducted on these mixtures are compaction, bearing capacity, compression and tensile tests. The experimental results show the feasibility of the beneficial use of Dunkirk marine dredged sand and sediments as a new material for the construction of foundation and base layers for roads. Further research is now needed to prove the resistance of this new material to various environmental impacts (e.g., frost damage).
为维持港口运营，欧洲每年都会疏浚大量沉积物。随着欧盟新指令的出台，鼓励港口管理者为这些物料寻找环保解决方案。本文研究了敦刻尔克海洋疏浚沉积物作为道路建设新材料资源的潜在用途。利用X射线衍射和显微镜分析评估沉积物的矿物成分。由于沉积物含水量高，已采用脱水处理。确定了符合法国标准要求的特定岩土标准的不同合适混合物。然后对这些混合物进行优化以实现经济再利用。对这些混合物进行的力学试验包括压实、承载力、压缩和拉伸试验。实验结果表明，将敦刻尔克海洋疏浚砂和沉积物作为道路基础层和基层建设的新材料进行有益利用是可行的。现在需要进一步研究来证明这种新材料对各种环境影响（如冻害）的抗性。
