Influence of Water on Alkali-Silica Reaction: Experimental Study and Numerical Simulations

Alkali-silica reaction (ASR) is a concrete pathology due to chemical reactions involving reactive silica from reactive aggregates and the inner solution of concrete. Main effects are swelling, cracking, and reduction in the mechanical properties of affected concretes. Water is very important for ASR; the more available water, the more expansion and degradation. This article presents new laws for modeling of the influence of water upon ASR. They are based on experimental results and then used to simulate results taken out of the scientific literature.

[1]  Stéphane Poyet.  Étude de la dégradation des ouvrages en béton atteints par la réaction alcali-silice : approche expérimentale et modélisation numérique multi-échelles des dégradations dans un environnement hydro-chemo-mécanique variable , 2003 .

[2]  Van Genuchten,et al.  A closed-form equation for predicting the hydraulic conductivity of unsaturated soils , 1980 .

[3]  Jean-Michel Torrenti,et al.  Modeling Concrete Shrinkage under Variable Ambient Conditions , 1999 .

[4]  Alexander Steffens,et al.  Mathematical model for kinetics of alkali-silica reaction in concrete , 2000 .

[5]  É. Merliot,et al.  Water distribution in beams damaged by alkali-silica reaction: Global weighing and local gammadensitometry , 2004 .

[6]  Olivier Coussy,et al.  Characterization and identification of equilibrium and transfer moisture properties for ordinary and high-performance cementitious materials , 1999 .

[7]  B. Capra,et al.  Modeling of Induced Mechanical Effects of Alkali-Aggregate Reactions , 1998 .

[8]  Yu-Jun Cui,et al.  The relationship between suction and swelling properties in a heavily compacted unsaturated clay , 1998 .

[9]  Catherine Larive,et al.  Apports combinés de l'expérimentation et de la modélisation à la compréhension de l'Alcali-réaction et de ses effets mécaniques , 1998 .

[10]  A. Nielsen,et al.  Development of stresses in concrete structures with alkali-silica reactions , 1993 .

[11]  R. Hooton,et al.  Reduction in Mortar and Concrete Expansion with Reactive Aggregates Due to Alkali Leaching , 1991 .

[12]  Kefei Li,et al.  Evaluation de l'état mécanique des ouvrages dégradés par la réaction alcali- silice , 2002 .

[13]  Yunping Xi,et al.  Moisture diffusion in cementitious materials Moisture capacity and diffusivity , 1994 .

[14]  R. D. Hooton,et al.  MIGRATION OF ALKALI IONS IN MORTAR DUE TO SEVERAL MECHANISMS , 1993 .