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There are advantages to Post-tensioned (PT) concrete construction compared to conventional reinforcement. However, corrosion caused tendon failures have recently been reported d/t chemically and/or physically deficient grout. A predictive model has been developed that projects onset and rate of wire and strand fractures.
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Evaluation of Post-Tensioned (PT) structures and the PT impregnation technique to mitigate corrosion of grouted PT tendons. Project case studies and laboratory research will be presented to demonstrate the technique and its effectiveness.
Flexible fillers have been used in Europe as an alternative to cementitious grout. In this study, the corrosion resistance of PT tendons is investigated as they are coated with flexible filler materials and contaminated with fungi.
The present paper reports results of analyses that address the influence of physical and modeling variables upon failure projections.
Reviews a recently proposed predictive model that projects the onset and subsequent rate of wire and strand fractures and tendon failures as a function of time. Includes first fracture onset results for wires and strands, failure onset for tendons, failure rates and testing of simulated tendons.