| Médium: |
papier de conférence |
| Langue(s): |
anglais
|
| Conférence: |
IABSE Conference: Engineering the Past, to Meet the Needs of the Future, Copenhagen, Denmark, 25-27 June 2018 |
| Publié dans: |
IABSE Conference Copenhagen 2018 |
|
Page(s):
|
352-358
|
Nombre total de pages (du PDF): |
7 |
|
|
Page(s):
|
352-358
|
| Nombre total de pages (du PDF): |
7 |
| DOI: |
10.2749/copenhagen.2018.352 |
|
Abstrait:
|
In the 1980s engineers faced major challenges from severe concrete deterioration from AAR (Alkali Aggregate Reaction) and from corrosion. The construction of the Channel and Storebaelt Tunnels required major improvements in specifying concrete to combat both these problems. Anglo-Danish cooperation of consultants and research centres led to innovations in cementitious materials, assessment of aggregates, the testing of materials and predicting deterioration. Since then RILEM has provided an international framework to guide developments on AAR diagnosis, appraisal, testing and specification. Quantitative durability design remains in its infancy. Rapid testing data do not predict migration over many decades. Fick’s law models neglect the physical and chemical processes of chloride migration. Data from old structures is needed for calibrating models and validating theories.
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Mots-clé:
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tunnels
|
