The Tendon Truncations Process on Site
Excavation of concrete around stressed tendons is a process that needs to be carefully understood and appropriately managed to ensure there is no damage to the tendon and, more importantly, the process is conducted in a safe manner.
The assumption cannot be made that the tendons are fully grouted and set out exactly as per the drawings or a third-party unverified scanning report.
Ungrouted tendons are, unfortunately, not particularly uncommon. The condition of the tendon grout must be assessed by experienced operatives during the excavation process, particularly in poorly grouted tendons.
This is a major safety issue and completely changes the approach to how the truncations are undertaken and whether remedial grouting must take place prior to the demolition of the floor slabs.
Slabtec provides documented reporting for the as-built condition of the tendon as a part of our standard QA procedure for the Design Engineers’ review.