MRI and Interfacial rheology techniques for evaluation of skin formation in adhesive mortars

Author(s): Alessandra L. Fujii, Fábio A. Cardoso, Anne Daubresse, Evelyne Prat, M. Chaouche
Paper category: Proceedings
Book title: Proceedings of the 2nd International RILEM/COST Conference on Early Age Cracking and Serviceability in Cement-based Materials and Structures Volume 1
Editor(s): Stéphanie Staquet and Dimitrios Aggelis
ISBN:978-2-35158-199-5
e-ISBN:978-2-35158-198-8
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 299-304
Total Pages: 6
Language : English

Abstract: The adhesive strength of adhesive mortars is determined at great extent by the properties of the mortar in the pasty state when the contact with the substrate is made. Therefore, rheological properties of the air-mortar interface are crucial and, in this investigation, a method to evaluate air-mortar interfacial rheology was introduced. A vane tool was employed to perform oscillatory tests and provide an estimate of the G’ modulus at the interface, as calculated by the difference of two measurements: one with the Vane only partially inserted in the sample, and the other with the Vane fully inserted within the bulk of the mortar. From MRI characterization, for the first 2h a dryer skin is formed up to 3 mm. The effects of cellulose ether (MHEC) content, its type and environmental conditions on interfacial properties of the adhesive mortar were evaluated.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00