Documents disponibles écrits par cet auteur

Durability properties of marine sediments stabilised by pozzolan and alkali-activated binders / Makiko Obana in European journal of environmental and civil engineering, Vol. 16 N° 8 (N° Spécial) (Septembre 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 8 (N° Spécial) (Septembre 2012) . - pp. 919-926 Titre : Durability properties of marine sediments stabilised by pozzolan and alkali-activated binders Type de document : texte imprimé Auteurs : Makiko Obana, Auteur ; Daniel Levacher, Auteur ; Philippe Dhervilly, Auteur Année de publication : 2012 Article en page(s) : pp. 919-926 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Durability  Marine  sediment  Stabilisation  Pozzolan  Alkali  activation Résumé : The Mont-Saint-Michel Project has been carried out to restore the maritime characteristics that existed before 1995. Attempts have been made to use marine sediments e.g. in the construction of pavements and driveways. Hence, methods to stabilise marine sediments have recently been developed. A new approach to sediment stabilisation is here proposed by using pozzolan and alkali-activated binders. Freeze–thaw and wet–dry tests are conducted to determine the durability of the sediments and to examine their suitability for use as construction material. The binders are prepared by alkali activation using pozzolan, and different amounts of the binders are mixed with marine sediment. The surfaces of one group of sediments are treated by a substance containing liquid glass. We compare the durability properties and deformation behaviours of two different types of specimen, by conducting tests and taking into consideration climatic conditions. The sediments stabilised by surface treatment showed high durability properties. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.676414 [article] Durability properties of marine sediments stabilised by pozzolan and alkali-activated binders [texte imprimé] / Makiko Obana, Auteur ; Daniel Levacher, Auteur ; Philippe Dhervilly, Auteur . - 2012 . - pp. 919-926. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 8 (N° Spécial) (Septembre 2012) . - pp. 919-926 Mots-clés : Durability  Marine  sediment  Stabilisation  Pozzolan  Alkali  activation Résumé : The Mont-Saint-Michel Project has been carried out to restore the maritime characteristics that existed before 1995. Attempts have been made to use marine sediments e.g. in the construction of pavements and driveways. Hence, methods to stabilise marine sediments have recently been developed. A new approach to sediment stabilisation is here proposed by using pozzolan and alkali-activated binders. Freeze–thaw and wet–dry tests are conducted to determine the durability of the sediments and to examine their suitability for use as construction material. The binders are prepared by alkali activation using pozzolan, and different amounts of the binders are mixed with marine sediment. The surfaces of one group of sediments are treated by a substance containing liquid glass. We compare the durability properties and deformation behaviours of two different types of specimen, by conducting tests and taking into consideration climatic conditions. The sediments stabilised by surface treatment showed high durability properties. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.676414

Utilization of fly ash for stabilization of marine dredged sediments / Ernesto Silitonga in European journal of environmental and civil engineering, Vol. 14 N° 2 (Fevrier 2010) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 14 N° 2 (Fevrier 2010) . - pp. 253-265 Titre : Utilization of fly ash for stabilization of marine dredged sediments Type de document : texte imprimé Auteurs : Ernesto Silitonga, Auteur ; Daniel Levacher, Auteur ; Salim Mezazigh, Auteur Année de publication : 2010 Article en page(s) : pp. 253-265 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Dredged  sediments  Fly  ash  Unconfined  compressive  strength  Wetting-drying  test Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Disposal of large sediment from dredging activities is increasingly intractable problem in France. The reuse of dredged sediment as a new material for the construction of foundation and base layers for roads is one of the solution. The main objective of this paper is to describe the behavioral aspect of dredged sediment stabilized with fly ash as a binder for a use in road pavement work. The addition of fly ash as a partial cement replacement is realized due to its engineering, economic and ecological benefits. The first stage contains a determination of the physical and mechanical characteristics of the fly ash and the dredged sediments. In the next stage, the dredged sediment from harbor of Cherbourg has been considered using 2 different types of fly ash and different percentage of fly ash ranging from 5 to 30% by weight of sediment. Finally, the mechanical characteristics of the mix with fly ash addition are compared with the mix with conventional used binders (cement).The experimental results show that the addition of fly ash gives a positive influence on the strength gained of the sample. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp [article] Utilization of fly ash for stabilization of marine dredged sediments [texte imprimé] / Ernesto Silitonga, Auteur ; Daniel Levacher, Auteur ; Salim Mezazigh, Auteur . - 2010 . - pp. 253-265. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 14 N° 2 (Fevrier 2010) . - pp. 253-265 Mots-clés : Dredged  sediments  Fly  ash  Unconfined  compressive  strength  Wetting-drying  test Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Disposal of large sediment from dredging activities is increasingly intractable problem in France. The reuse of dredged sediment as a new material for the construction of foundation and base layers for roads is one of the solution. The main objective of this paper is to describe the behavioral aspect of dredged sediment stabilized with fly ash as a binder for a use in road pavement work. The addition of fly ash as a partial cement replacement is realized due to its engineering, economic and ecological benefits. The first stage contains a determination of the physical and mechanical characteristics of the fly ash and the dredged sediments. In the next stage, the dredged sediment from harbor of Cherbourg has been considered using 2 different types of fly ash and different percentage of fly ash ranging from 5 to 30% by weight of sediment. Finally, the mechanical characteristics of the mix with fly ash addition are compared with the mix with conventional used binders (cement).The experimental results show that the addition of fly ash gives a positive influence on the strength gained of the sample. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp