Modelling of the sulphate attack in cement-based materials

Title: Modelling of the sulphate attack in cement-based materials
Author(s): E. Rozière, A. Loukili, R. El-Hachem
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 199 - 206
Total Pages: 8
Nb references: 18
Language: English

Abstract: In this paper, we present a study on the durability of cement-based materials in their environment and for instance on the problems involved in their degradation when they are subjected to sulphate attacks. This problem is prone to many interrogations on the origin of the degradation of concrete under such conditions. We are interested in the ettringite formation during the chemical reaction between aggressive agents and the components of mortar, developing a pressure in the pores of the cement paste. When this pressure is higher than the tensile strength of the material, micro-cracks propagate in the microstructure. It is noted the behaviour of cement-based materials is strongly related to the fine comprehension of the evolution of the microstructure properties. Based on experimental tests, a numerical study is carried out to model the sulphate attacks in mortars tested in laboratory.

Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00

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