Title :

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

Author(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]

Journal title :

Construction and Building Materials

Pages :

1137 - 1144

Publisher :

Elsevier

Publication date :

2013

ISSN :

0950-0618

Keyword(s) :

Concrete

English keyword(s) :

Release agent
Interstitial medium
Superplasticizer
Friction
Physicochemical properties

HAL domain(s) :

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

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

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

Source :

Harvested from HAL

Submission date :

2025-02-26T12:47:52Z