title: Beneficial reuse of Brest-Harbor (France)-dredged sediment as alternative material in road building: laboratory investigations.
abstract: The scarcity of natural aggregates promotes waste reuse as secondary raw material in the field of civil engineering. This article focuses on the beneficial reuse of marine-dredged sediments in road building. Thus, mixtures of raw sediments and dredged sand collected from Brest Harbur (Bretagne, France) were treated with road hydraulic binders. Formulation were prepared and characterized as recommended by the French Technical Guidelines for soil treatment with lime and/or hydraulic binders. Mechanical resistance results are quite similar for both the hydraulic binders, suggesting a similar reactivity with the studied sediment sample. However, some discrepancies can be noted on sustainability parameters. Indeed, water resistance after immersion at 40°C is significantly better for the mixtures treated with cement containing more glass-forming oxides (SiO2+ Al2O3) and fluxing (Fe2O3+CaO + MgO + K2O + Na2O). Moreover, the both hydraulic binders can lead to swelling in the road materials as observed in scanning electron microscopy analyses. Indeed, microscopic observations indicated volumetric swelling of treated samples, which is greatly influenced on the one side by ettringite quantity and on the other hand by the presence of water in pores material.
authors.affiliation: a Civil and Environmental Engineering Department , Ecole des Mines de Douai , Douai , France.|b Ecole Supérieure d'Ingénierie et des Travaux de la Construction de Caen (ESITC Caen) , Epron , France.
authors.forename: Walid
authors.initials: W
authors.lastname: Maherzi
authors.affiliation: a Civil and Environmental Engineering Department , Ecole des Mines de Douai , Douai , France.
authors.forename: Mahfoud
authors.initials: M
authors.lastname: Benzerzour
authors.affiliation: a Civil and Environmental Engineering Department , Ecole des Mines de Douai , Douai , France.
authors.forename: Yannick
authors.initials: Y
authors.lastname: Mamindy-Pajany
authors.affiliation: c Camborne School of Mines, CEMPS , University of Exeter , Penryn , UK.
authors.forename: Eleanor
authors.identifier: http://orcid.org/0000-0002-5432-3521
authors.initials: E
authors.lastname: van Veen
authors.affiliation: b Ecole Supérieure d'Ingénierie et des Travaux de la Construction de Caen (ESITC Caen) , Epron , France.
authors.forename: Mohamed
authors.identifier: http://orcid.org/0000-0002-2752-8265
authors.initials: M
authors.lastname: Boutouil
authors.affiliation: b Ecole Supérieure d'Ingénierie et des Travaux de la Construction de Caen (ESITC Caen) , Epron , France.
authors.forename: Nor Edine
authors.initials: NE
authors.lastname: Abriak
mesh_terms: D017610:Calcium Compounds; D003247:Conservation of Natural Resources / Q000379:methods*; D003252:Construction Materials / Q000032:analysis*; D005290:Ferric Compounds; D005602:France; D019015:Geologic Sediments / Q000032:analysis*; D008422:Materials Testing; D008903:Minerals; D010087:Oxides; D012822:Silicon Dioxide; D014186:Transportation
chemical_list: D017610:Calcium Compounds; D005290:Ferric Compounds; D008903:Minerals; D010087:Oxides; C501337:ettringite; D012822:Silicon Dioxide; C016538:lime
keywords: Marine sediment; beneficial reuse; road materials; sustainability; waste management