Coupling between leaching and creep of concrete

In a radioactive waste disposal, concrete containment structures must be studied over extended periods during which it is necessary to account for a possible degradation by calcium leaching due to on-site water. An experimental investigation is described where the effects of an accelerated calcium leaching process of concrete on creep of concrete are highlighted. The comparison with a creep test where the sample is immersed in water shows that leaching generates tertiary creep and rupture of the specimen. A Dirichlet series coupled to a mechanical damage are used to model the coupled tertiary creep. With this method we can evaluate the lifetime of concrete structures subjected to chemical and mechanical loading.

[1]  Franz-Josef Ulm,et al.  POROPLASTIC PROPERTIES OF CALCIUM-LEACHED CEMENT-BASED MATERIALS , 2003 .

[2]  Raoul François,et al.  Effect of the leaching of calcium hydroxide from cement paste on mechanical and physical properties , 1997 .

[3]  Claude Boulay,et al.  Chemo-mechanical coupling behaviour of leached concrete: Part I: Experimental results , 2007 .

[4]  Franz-Josef Ulm,et al.  VOLUME AND DEVIATOR CREEP OF CALCIUM-LEACHED CEMENT-BASED MATERIALS , 2003 .

[5]  Claudio Mazzotti,et al.  Nonlinear Creep Damage Model for Concrete under Uniaxial Compression , 2003 .

[6]  Viet Hung Nguyen,et al.  Couplage dégradation chimique - comportement en compression du béton , 2005 .

[7]  J. Dube,et al.  Coupled Mechanical and Chemical Damage in Calcium Leached Cementitious Structures , 2003 .

[8]  Claudio Mazzotti,et al.  Nonlinear Creep, Poisson's Ratio, and Creep-Damage Interaction of Concrete in Compression , 2002 .

[9]  Frédéric Adenot,et al.  Durabilite du beton : caracterisation et modelisation des processus physiques et chimiques de degradation du ciment , 1992 .

[10]  Z. Bažant,et al.  Concrete creep at variable humidity: constitutive law and mechanism , 1985 .

[11]  F. Ulm,et al.  Elements of chemomechanics of calcium leaching of cement-based materials at different scales , 2003 .

[12]  L. Granger.  Comportement différé du béton dans les enceintes de centrales nucléaires , 1996 .

[13]  Franz-Josef Ulm,et al.  Chemoporoplasticity of Calcium Leaching in Concrete , 1999 .

[14]  Z. Bažant,et al.  Crack Growth and Lifetime of Concrete under Long Time Loading , 1997 .

[15]  Bruno Gérard,et al.  Modelling the leaching kinetics of cement-based materials––influence of materials and environment , 2003 .

[16]  Hiroshi Saito,et al.  Preliminary experimental study on the deterioration of cementitious materials by an acceleration method , 1992 .

[17]  Bruno Gérard,et al.  Contribution des couplages mécanique-chimie : transfert dans la tenue à long terme des ouvrages de stockage de dechets radioactifs , 1996 .

[18]  Raoul François,et al.  Leaching of both calcium hydroxide and C-S-H from cement paste: Modeling the mechanical behavior , 1996 .

[19]  Claire Tognazzi-Lawrence,et al.  Couplage fissuration - degradation chimique dans les materiaux cimentaires : caracterisation et modelisation , 1998 .

[20]  The Resistance of Cements to Ammonium Nitrate Attack , 1991 .

[21]  Jean-Marie Reynouard,et al.  Fluage tertiaire du béton en traction , 2004 .

[22]  La dégradation des bétons , 1999 .

[23]  J. Mazars.  APPLICATION DE LA MECANIQUE DE L'ENDOMMAGEMENT AU COMPORTEMENT NON LINEAIRE ET A LA RUPTURE DU BETON DE STRUCTURE , 1984 .

[24]  Siham Kamali.  Comportement et simulation des matériaux cimentaires en environnement agressifs : Lixiviation et température , 2003 .

[25]  Caractérisation et modélisation de l'altération des propriétés mécaniques due à la lixiviation des matériaux cimentaires , 1996 .

[26]  Miguel Cervera,et al.  THERMO-CHEMO-MECHANICAL MODEL FOR CONCRETE. II: DAMAGE AND CREEP , 1999 .

[27]  D Bruhat,et al.  Investigation of the basic creep of concrete by acoustic emission , 1994 .

[28]  Detlef Kuhl,et al.  Coupled chemo-mechanical deterioration of cementitious materials. Part I: Modeling , 2004 .

[29]  Alain Sellier,et al.  Concrete mechanical behaviour and calcium leaching weak coupling , 2006 .

[30]  G. Pijaudier-Cabot,et al.  Etude comparative du couplage endommagement-fluage , 2004 .

[31]  Olivier Coussy,et al.  Propagation Fronts during Calcium Leaching and Chloride Penetration , 2000 .