Assessment of pre-stressed concrete bridges suffering from alkali-silica reaction

✍ Scribed by M.A. Tordoff

• Book ID: 103978936
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 745 KB
• Volume: 12
• Category: Article
• ISSN: 0958-9465
• DOI: 10.1016/0958-9465(90)90021-o

✦ Synopsis

Seven pre-stressed post-tensioned concrete bridges, known to be suffering from alkali-silica reaction (ASR) were inspected in 1989 and their structural capacity assessed. The sixteen-year-old bridges are mainly of 42.3 m span through girder construction and carry farm access tracks over dual carriageway trunk roads. As the assessment progressed the author became increasingly aware that research into ASR has concentrated on petrography, chemistry and the microstructure of concrete. Insufficient research has been carried out to assess the structural consequences of ASR and no work has been carried out on concrete members which are truly representative of the prototype. From the evidence available it was concluded that the bridges have not been weakened by ASR and that there is no reason to suspect that durability will be a greater problem than in other typical bridges in similar locations.