| Titre : | Physico-chemical characterization of EVA-modified mortar and porcelain tiles interfaces (2010) |
| Auteurs : | Alexandra A.P. Mansur, Auteur ; Otávio Luiz do Nascimento, Auteur ; Herman S. Mansura, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Cement and concrete research (Vol. 39 N° 12, Décembre 2009) |
| Article en page(s) : | pp. 1199-1208 |
| Note générale : | Génie Civil |
| Langues : | Anglais |
| Index. décimale : | 691 (Matériaux de construction. Pièces et parties composantes) |
| Résumé : | EVA (poly(ethylene-co-vinyl acetate)) redispersable powders with different contents of copolymers were tested in order to evaluate their effects on the complex interactions developed at mortar/tile interface. EVA addition has increased the bond strength almost 40% when compared with unmodified mortar. Based on EVA hydrolysis, a novel method named as ‘Extension of Hydrolysis (EH)’ was suggested to monitor the reaction mechanism which occurred during the interface layer formation. Thus, higher EH values were related to a significant improvement of adhesion at interface observed as a changing on the failure mode from mostly cohesion to adhesion. Calculated EH parameter of 2.64 was associated with a cohesive component of rupture in the mortar of 50% while for an EH of 0.92, the rupture in the mortar was only 7%. The enhancement on adhesion was attributed to the hybrid ceramic–polymer interface formed based on hydrogen-bonds between silanol groups from tile surface and hydroxyl groups from hydrolyzed EVA. |
| DEWEY : | 620.13 |
| ISSN : | 0008-8846 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S000888460900180X |
