| Medium: |
conference paper |
| Language(s): |
English
|
| Conference: |
IABSE Conference: Engineering the Past, to Meet the Needs of the Future, Copenhagen, Denmark, 25-27 June 2018 |
| Published in: |
IABSE Conference Copenhagen 2018 |
|
Page(s):
|
352-358
|
Total no. of pages: |
7 |
|
|
Page(s):
|
352-358
|
| Total no. of pages: |
7 |
| DOI: |
10.2749/copenhagen.2018.352 |
|
Abstract:
|
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.
|
|
Keywords:
|
durability design tunnels AAR Chlorides concrete deterioration SCM
|
