jabbour;, mike
External sulfate attack (ESA) of cementitious materials has been studied worldwide for a very long time. This physical/chemical interaction between sulfate ions and the cement hardened elements affects the long-term durability of concrete structures: cracking, spalling or strength loss of concrete structures. To study these damaging phenomena, some...
Delaplanque, Noëmie Chataigner, Sylvain Gaillet, Laurent Quiertant, Marc Benzarti, Karim Rolland, Arnaud Chapeleau, Xavier Flores, A. Saravia
Distributed Optical Fiber Sensors (DOFS) are gaining interest for structural health monitoring applications. Recently, they have been successfully used to monitor the strain profiles at the interface between concrete and steel or composite rebars during pullout tests. In the framework of durability studies on Glass Fiber-Reinforced Polymer reinforc...
Martin, Renaud Pierre Bonnet, Amandine Renaud, Jean Claude Chlela, Robert Toutlemonde, François Sauvaget, Cyrille
ICAAR 2020-2022, 16th International Conference on Alkali-Aggregate Reaction in Concrete, Lisbonne, PORTUGAL, 31-/05/2022 - 02/06/2022
Gu, Yushan Dangla, Patrick Martin, Renaud-Pierre Omikrine Metalssi, Othman Fen Chong, Teddy
External sulfate attack (ESA) and delayed ettringite formation (DEF) are well-known concrete degradation phenomena induced by ettringite crystallization. This paper proposes a poromechanical model based on the surface-controlled ettringite growth mechanism and the chemical composition of the solution, explaining both ESA and DEF in a similar model....
REGNICOLI BENITEZ, Bruno D. SEIGNOL, Jean François NEDJAR, Boumediene
ICAAR 2021, 16th International Conference on Alkali-Aggregate Reaction in Concrete Structrures, Lisbonne, PORTUGAL, 01-/06/2021 - 03/06/2021
REGNICOLI BENITEZ, Bruno D. SEIGNOL, Jean François NEDJAR, Boumediene
Internal swelling reactions (ISR) in concrete can have significant impact on the long-term behaviour of massive concrete structures. This communication presents the foundations of a constitutive model developed within the framework of the finite-element method. In order to reach, in further step, a correct quantification of the visible crack patter...
Martin, Renaud Pierre Godart, Bruno Toutlemonde, François
This test method covers the laboratory determination of the swelling potential and the residual free expansion of concrete extracted from structures affected by alkali silica reactions.
Godart, Bruno WOOD, Jonathan
AAR and DEF can lead to the development of severe cracking in structures. Both reactions are often associated with high cementcontent mixes: AAR because of the increased availability of alkalis, DEF because the heat of cement hydration can lead to temperaturesover 65 ?C, above which sulphates lead to the delayed formation of expansive ettringite. H...
COUDERT, Elodie DENEELE, Dimitri RUSSO, Giacomo VITALE, Enza TARANTINO, Alessandro
This work focuses on the use of alkali activated fly ash-based binder to enhance engineering characteristics of soft clay-rich soils and as a substitute to standard stabilisers (e.g., lime or cement). Especially, it examines the microstructural evolution of a calcium-rich fly ash from coal combustion-based binder activated by a sodium-based alkalin...
GODART, Bruno WOOD, Jonathan
AAR and DEF can lead to the development of severe cracking in structures. Both reactions are often associated with high cement content mixes: AAR because of the increased availability of alkalis, DEF because the heat of cement hydration can lead to temperatures over 65 ?C, above which sulphates lead to the delayed formation of expansive ettringite....
