scope:

This report includes a review and summary of the following:

(a) Guide specifications and training as applied to grouted post-tensioning tendons

(b) Quality control during construction

(c) Potential problem areas in grouted systems

(d) Durability enhancements for each component of the tendon

(e) Evaluation and mitigation of corrosion problems

(f) Repair methods for grouted systems

This report is intended to provide general information on the corrosion and repair of grouted multistrand and bar tendon systems. The information is intended to represent the state of knowledge of the committee in the areas of corrosion prevention in grouted tendons, as well as evaluation and repair. It is not intended as a standard or recommended practice. A strong background in durability of grouted posttensioning systems, including practical experience and training, is recommended before designing, constructing, evaluating, or repairing these structures.

This report focuses on the unique materials and hardware associated with grouted post-tensioning tendons with a discussion of efforts within the industry to improve durability. This report also provides recent practice with regard to evaluation and repair of grouted post-tensioning systems. General corrosion theory for metals in structural concrete systems is not within the scope of this report. Information on corrosion theory and mechanisms can be found in ACI 222R and ACI 222.2R. Information on inspection and evaluation of unbonded single-strand post-tensioning systems can be found in PTI DC80.3/ICRI 320.6.