A Study of Methods to Evaluate the Durability of Post-Installed Bonded Anchors
By S. Iguchi
Concrete Journal, Vol.54, No.3, Mar. 2016
- Synopsis
- Since an accident involving the collapse of ceiling slabs in the Central Nippon Expressway Sasago Tunnel, the method used to verify the durabihty performance of post-installed bonded anchors has been an issue. Metallic anchors are the main type of anchors used for road applications, whereas bonded anchors are often used for railway applications based on consideration of the effect of the vibrations caused by train traffic. Although the US and Europe have some standards for bonded anchor durability evaluation methods, a significant amount of data regarding test methods and test results has not been made public. In this context, the author conducted an investigation of Western test methods related to the alkali resistance and creep properties of post-installed bonded anchor. This investigation revealed that while differences among test methods affect test results, a certain degree of assessment is possible.
- Keywords:
- post-installed bonded anchor, durability, alkali resistance, creep
