Valorization of unauthorized sea disposal dredged sediments as a road foundation material

Abstract

The main objective of this study is to show the ability of fine dredged material (mainly silty material) to be used in road construction project. This paper is divided into three parts. In the first part, the physical, the mineralogical and the mechanical characteristics of the used fine dredged sediments, as well as their chemical composition and environmental impacts are presented. In the second part, the methodology developed to design the road made from dredged fine sediment is developed. The third part of the paper focuses on the presentation of the road construction and the interpretation of analyses made on cores drilled samples from the road and measurements of the deflection of the road. The environmental assessment, based on leaching tests, is also performed at different issues.

Keywords:

• fine dredged sediment
• valorization
• environmental assessment
• experimental road construction
• mechanical performance

Acknowledgements

This research reported herein was conducted as part of a project to develop alternative solutions for dredged fine sediment management sponsored by the programme SEDIMATRERIAUX. This support is gratefully acknowledged.