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Pro109-2

DEFINITION OF DAMAGE DISTRIBUTION DUE TO INTERNAL EXPANSIVE REACTIONS IN LONG TERM CONCRETE STRUCTURES



Author(s): Esperanza Menéndez, Ricardo García-Rovés, Sergio Ruiz, José de Frutos
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-171-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 621-630
Total Pages: 10
Language : English


Abstract: The long term exposition of concrete to the environmental actions can induce loss of
durability properties. Some of these actions are associated with the ingress of aggressive. But
also the alteration of concrete can be associated with the internal reactions of the own
components of the concrete. Especially in the structures in permanent contact with the water
some internal reactions can induce degradation due to expansive reactions, like alkali-silica
reaction or internal sulfate attack. And, some additional factor as alkali release by aggregates
can influence the increase the degradation due to expansive reactions. In this work an analysis
of damage by internal expansion in field structures is done. The analysis at microstructural
level of the concretes affected internal expansive reaction permits to distinguish to the origin
of damage, alkali-silica reaction or internal sulfate attack. Also, a definition of the damage
level of concrete could be defined for each type of degradation process. The analysis of
concrete in different parts of the structures and their analysis by microstructural techniques
permit to define a distribution of concrete damage in each zone.


Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00


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