Microstructure and mechanical properties of polymer-modified mortars / Sandrine Marceau in European journal of environmental and civil engineering, Vol. 16 N° 5 (Mai 2012)  

Public ISBD [article]  inEuropean journal of environmental and civil engineering > Vol. 16 N° 5 (Mai 2012) . - pp. 571-581 Titre : Microstructure and mechanical properties of polymer-modified mortars Type de document : texte imprimé Auteurs : Sandrine Marceau, Auteur ; Florent Lespinasse, Auteur ; Julien Bellanger, Auteur Année de publication : 2012 Article en page(s) : pp. 571-581 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Repair product Polymer modified mortars Latex Mortar Cure Résumé : The influence of the addition of polymer in mortars is investigated with special emphasis on the microstructure and mechanical properties of hardened materials. The presence of polymer in the mortars causes an increase of both the setting time of the cement and the porosity in hardened materials. The observation of these composites by scanning electron microscopy shows the formation of a continuous film of polymer within the matrix for a polymer/cement ratio of 10%. Therefore, the presence of polymer provides a structure where bicontinuous phases of polymer and cement hydrates are intertwined. This leads to a better resistance to acid attack and improves the adhesion between the cement paste and aggregates in mortars. The mechanical properties of composite mortars decrease with the addition of polymer due to the increase of porosity. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.675148 [article] Microstructure and mechanical properties of polymer-modified mortars [texte imprimé] / Sandrine Marceau, Auteur ; Florent Lespinasse, Auteur ; Julien Bellanger, Auteur . - 2012 . - pp. 571-581. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 5 (Mai 2012) . - pp. 571-581 Mots-clés : Repair product Polymer modified mortars Latex Mortar Cure Résumé : The influence of the addition of polymer in mortars is investigated with special emphasis on the microstructure and mechanical properties of hardened materials. The presence of polymer in the mortars causes an increase of both the setting time of the cement and the porosity in hardened materials. The observation of these composites by scanning electron microscopy shows the formation of a continuous film of polymer within the matrix for a polymer/cement ratio of 10%. Therefore, the presence of polymer provides a structure where bicontinuous phases of polymer and cement hydrates are intertwined. This leads to a better resistance to acid attack and improves the adhesion between the cement paste and aggregates in mortars. The mechanical properties of composite mortars decrease with the addition of polymer due to the increase of porosity. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.675148

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