Lightweight Concrete Bridge with External PreStressing
Another development in the bridge industry is the use of lightweight concrete in construction of new bridges as well as rehabilitation of existing bridges. Sirarika River Bridge is Japan was constructed with lightweight concrete with external pre-stressing. This was first bridge in Japan, which adopted HLA concrete for a PSC bridge. This is a three spans continuous box girder bridge with pre-stressing in the longitudinal direction being provided competently by external tendons. Another important feature in this bridge is that transparent sheets were used to cover for external tendons. This facilitates proper monitoring of grouting of external tendons to prevent any corrosion. It is expected with improved protection to steel external tendons, the use of this technology will become more popular.
Shirarika River Bridge Made of HLA Concrete
Transparent Sheaths used for Inspection of Grouting
If you enjoyed this post, please consider to leave a comment or subscribe to the feed and get future articles delivered to your feed reader.