A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Post Tension Plugs
The current version of ACI 423.7 requires that all post-tensioning tendons be encapsulated to protect them from corrosion. Although this specification is not yet in effect in many local jurisdictions, design engineers are already requiring encapsulated systems to be used on all of their projects. With or without encapsulation, the primary line of defense against corrosion of the post-tensioning anchorage is the material filling the stressing pocket. Traditionally, this material is a premixed cementitious nonshrink grout applied to a well-prepared surface. However, mixing products on site can be challenging. If the cured patch shrinks and cracks, the first line of defense can be breached by wind-driven water. Post Tension Plugs provide a new, efficient means for sealing anchor pockets. These precisely cast units are precast from nonshrink grout (8500 pound per square inch [59 Megapascal] compressive strength at 28 days) and are available to fit voids left by most common pocket formers. The precast plugs are easily stored on the jobsite until needed.
Post Tension Plugs
The current version of ACI 423.7 requires that all post-tensioning tendons be encapsulated to protect them from corrosion. Although this specification is not yet in effect in many local jurisdictions, design engineers are already requiring encapsulated systems to be used on all of their projects. With or without encapsulation, the primary line of defense against corrosion of the post-tensioning anchorage is the material filling the stressing pocket. Traditionally, this material is a premixed cementitious nonshrink grout applied to a well-prepared surface. However, mixing products on site can be challenging. If the cured patch shrinks and cracks, the first line of defense can be breached by wind-driven water. Post Tension Plugs provide a new, efficient means for sealing anchor pockets. These precisely cast units are precast from nonshrink grout (8500 pound per square inch [59 Megapascal] compressive strength at 28 days) and are available to fit voids left by most common pocket formers. The precast plugs are easily stored on the jobsite until needed.
| Online Contents | 1983