Assesment of Severely ASR Damaged Bridges: From Diagnosis to Structural Effects

Ricardo Antonio Barbosa, Søren Gustenhoff Hansen, Kurt Kielsgaard Hansen, Linh Cao Hoang, Bent Grelk, Iben Maag

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    Abstract

    During the last decade an increasing number of bridges are becoming severely deteriorated due to alkali-silica reaction (ASR) in Denmark. Some bridges have already been demolished due to lack of knowledge on the residual load carrying capacity. The deterioration of concrete by ASR has been widely documented. The majority of the experimental data are based on relatively small scale laboratory specimens accelerated by various exposure conditions. Research on assessment and influence of severely ASR deterioration on the material properties and residual load carrying capacity of real-life structures is unfortunately limited. This paper presents an overview and discussion of the Danish experiences with assessment of the residual load carrying capacity of severely non-shear reinforced ASR damaged bridges. The discussion is supported by experimental data acquired from large scale in-situ tests of three severely ASR deteriorated bridges. The influence of ASR cracking on the mechanical properties of concrete and the pre-stress effect on the reinforcement due to ASR expansion are discussed.
    Original languageEnglish
    Title of host publicationProceedings of the 15th international conference on alkali-aggregate reaction in concrete (15th ICAAR)
    Number of pages10
    Publication date2016
    Publication statusPublished - 2016
    Event15th International Conference on Alkali-Aggregate Reaction in Concrete - São Paulo, Brazil
    Duration: 3 Jul 20167 Jul 2016
    Conference number: 15

    Conference

    Conference15th International Conference on Alkali-Aggregate Reaction in Concrete
    Number15
    Country/TerritoryBrazil
    CitySão Paulo
    Period03/07/201607/07/2016

    Bibliographical note

    ISSN 2525-4189

    Keywords

    • ASR
    • Bridges
    • Pre-stress
    • Compressive strength and shear capacity

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