Conférence Méditerranéenne Côtière et Maritime EDITION 2, TANGER, MAROC (2011) Coastal and Maritime Mediterranean Conference Disponible en ligne – http://www.paralia.fr – Available online Dredged marine sand for harbour concrete pavement Jussara LIMEIRA 1 , Luis AGULLO †1 , Miren ETXEBERRIA 1 , Daniel LEVACHER 2 1. Department of Construction Engineering, Polytechnic University of Catalonia, Jordi Girona, 1-3, C1 Barcelona, Spain. jussara_limeira@yahoo.com; miren.etxeberria@upc.edu 2. Department of Continental and Coastal Morphodynamics M2C, University of Caen, 24, rue des Tilleuls 14000 Caen, France. Abstract: Dredging works are usually required to maintenance activities in many ports all over the world and represents a huge volume of disposal material. The use of dredged aggregates can be considered in several applications as erosive process control, coastal stabilization, beach replenishment, production of construction materials (aggregates, bricks, concrete), for sub layers of road engineering with stabilized materials, or for construction works (quarry fillings, disposal waste cappings). Researches revealed the feasibility of dredged marine sand (DMS) in the construction of base and sub-base harbour pavements incorporating this material to hydraulic binder mixes (cement and/or lime with additives) in order to improve the grading of aggregates and correct the granular skeleton. Its main objective is to improve the packing and to obtain the compressive properties required for geotechnical applications. In this work the study of dredged marine sand (DMS) from the Port of Sant Carles de la Rápita (Tarragona, Spain) as constructive material is presented. The analysis of chemical and physical characteristics of DMS is described. Two experimental phases were carried out once these characteristics were determined. DMS was used in the production of concretes as fine aggregates. A pilot experience was carried out with concrete port pavements produced in industrial scale. Fresh and hardened properties of the concretes were determined and compared to the control mix. Results show satisfactory behaviour of DMS as constructive material when incorporated in concrete as corrective sand. Keywords: Dredged marine sand – Mortar – Concrete – Fine sand corrector – Polypropylene fibers – Unconfined compressive strength – Flexural strength – Workability properties 1. Interest Dredging works represents a huge volume of disposal material and are usually required to maintenance activities in many ports all over the world. This material can be used in several coastal applications but also as construction material (bricks and aggregates) or DOI:10.5150/cmcm.2011.044 205