Treatment of river sediments by hydraulic binders for valorization in road construction

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• 作者：B. Banoune ; B. Melbouci ; F. Rosquoët…
• 关键词：Dredged sediment ; Mechanical behavior ; Valorization ; Road materials ; Solidification/stabilization ; Cement ; Lime
• 刊名：Bulletin of Engineering Geology and the Environment
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：75
• 期：4
• 页码：1505-1517
• 全文大小：2,707 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Applied Geosciences
  Structural Foundations and Hydraulic Engineering
  Geoecology and Natural Processes
  Nature Conservation
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1435-9537
• 卷排序：75

文摘

Reuse of dredging sediments has already generated interest and been the subject of a few comprehensive studies. The dredging of dams and rivers consists in very expensive operations that implement large volumes of materials. The valorization of sediments is an alternative for storage or sea disposal and offers a better environmental solution. Two specific cases of dredged sediment valorizations in the region of Bejaia in Algeria are studied: sediments of Kherrata dam and the Soummam River. Laboratory tests are performed to characterize the dredged sediment according to French standards of geotechnical classification. The characterization shows the need to improve their mechanical behavior, to allow use in the road field. The experimental work on solidification and stabilization sediments, in sublayers of roads is based on a treatment with hydraulic binders: cement or lime. Tests on binder-based sediment material are carried out for ratios of binders between 2 and 15 % of sediment dry weight. The addition of particle-size correctors, sand or quarry fines, is studied in order to reduce the use of lime. The results show the efficiency of treatment with hydraulic binders, in particular with cement. The quarry fines improve the mechanical behavior in the short term for sediment treated with lime.