Contribution of the Marine Sediments of La-Goulette Harbor (Tunisia) in the Improvement of the RCC Compactness and Strength for Pavement - Abstract
The Roller Compacted Concrete (RCC) for pavement is presented as an evolutionary technology in which various types of aggregates are classically
used, such as the crushed and the rolled either limestone or siliceous aggregates. The objective of the formulation methods of the RCC is the determination of
optimal mixture of the different aggregates. The correct proportioning, of the cement and water, is also one of the important parameter to reach the maximum
compactness.
The present work comported the study of the use of the marine sediments, in preparing RCC for pavement, as aggregates resulting from dredging of
the La-Goulette harbor (Tunisia). This approach allows a profit from their contributions to the improvement of the mechanical strengths of the RCC. This study
is based on the valorization of the marine sediments, classified as waste and where their storages remain harmful for the environment. Compressive Packing
Model (CPM) was used for the formulation of the RCC mixtures. This study, containing also a mechanical characterization of the obtained material, showed that
the marine sediments used, confer physically and economically considerable advantages to the RCC. The higher compactness and the mechanical strengths,
obtained, showed the profitability of such RCC containing sediments.