Titre :

Effect of a superplasticizer on the properties of the concrete/oil/formwork interface

Auteur(s) :

Bouharoun, Samir [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
de Caro, Pascale [Auteur]
Chimie Agro-Industrielle [CAI]
Dubois, Isabelle [Auteur]
Djelal, Chafika [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Vanhove, Yannick [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]

Titre de la revue :

Construction and Building Materials

Pagination :

1137 - 1144

Éditeur :

Elsevier

Date de publication :

2013

ISSN :

0950-0618

Mot(s)-clé(s) :

Concrete

Mot(s)-clé(s) en anglais :

Release agent
Interstitial medium
Superplasticizer
Friction
Physicochemical properties

Discipline(s) HAL :

Sciences du Vivant [q-bio]/Ingénierie des aliments
Sciences de l'ingénieur [physics]/Génie des procédés

Résumé en anglais : [en]

The release agents protect the internal surfaces of formwork against corrosion and also ensure easy removal of the concrete elements. On the other hand, the superplasticizers are used to enhance the fluidity of the fresh ...
Lire la suite >The release agents protect the internal surfaces of formwork against corrosion and also ensure easy removal of the concrete elements. On the other hand, the superplasticizers are used to enhance the fluidity of the fresh concrete without adding water, thanks to their surfactant properties. Their contact with release agents can cause interactions near the formwork surfaces during the concrete pouring. The aim of this study is to identify the effect of a polycarboxylic ether superplasticizer on the tribological behavior of fresh concrete at the concrete/oil/formwork interface. Friction tests were performed using a plane/plane tribometer on three concretes with 30% of paste at different dosages of superplasticizer. Moreover, the purpose of the physicochemical study was to clarify the nature of the interactions between concrete pore solutions and release agents. Results showed that the superplasticizer dosage did not have the same effect on the friction according to the oil nature involved at interface. Thus, a description of the processes occurring at the concrete/oil/formwork interface is proposed. When the superplasticizer generates a deflocculating action of the cement particles, it also acts on the stabilization of the soap-oil micellae present at the interface.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515

Source :

Harvested from HAL

Date de dépôt :

2025-02-26T12:47:52Z