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A Flow-through Exposure System for Evaluating Suspended Sediments Effects on Aquatic Life
Published on: January 9, 2017
Solidification/stabilization of dredged marine sediments for road construction
Dong Xing Wang1, Nor Edine Abriak, Rachid Zentar
1Civil and Environmental Engineering Department, Ecole des Mines de Douai, 941 rue Charles Boursul, BP 10838, 59508 Douai Cedex, France. dongxing.wang@mines-douai.fr
Environmental Technology
|April 24, 2012
Summary
Cement and lime solidification offer an eco-friendly method for managing dredged marine sediments. Stabilized sediments show potential for road construction, with cement proving more effective than lime for strength enhancement.
Area of Science:
- Environmental Engineering
- Geotechnical Engineering
- Materials Science
Background:
- Traditional disposal of dredged marine sediments, such as immersion, poses environmental risks.
- Cement/lime-based solidification presents a sustainable alternative for sediment management.
- Dunkirk sediments' mineralogy and physical properties influence solidification effectiveness.
Purpose of the Study:
- To assess the effects of cement and lime solidification on Dunkirk marine sediments.
- To evaluate the suitability of solidified sediments for road construction applications.
- To determine optimal binder content for sediment stabilization.
Main Methods:
- Atterberg limits, modified Proctor compaction, unconfined compressive strength, and indirect tensile strength tests were performed.
- The California Bearing Ratio (CBR) value and material classification were used to evaluate road construction potential.
- Binder content variations were analyzed for their impact on sediment properties.
Main Results:
- Solidification significantly improved sediment strength and altered Atterberg limits.
- Cement demonstrated superior strength enhancement compared to lime.
- A 6% cement content was identified as an economical and effective stabilization level for fine sediments.
Conclusions:
- Cement/lime-based solidification is a feasible technique for the beneficial reuse of dredged marine sediments in road construction.
- Solidified sediments meet the criteria for use as construction materials.
- Optimized cement addition provides a cost-effective solution for stabilizing fine sediments.
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