The principal cause of corrosion of unbonded post-tensioned (PT) cables is the presence of moisture  and air inside voids along the cable sheaths. Moisture infiltration can occur from numerous sources including initial construction, ground water, roof leakage, and poor quality grout pockets.

PT cable corrosion occurs most often in unprotected structures such as parking garages, balconies and roof slabs; however numerous instances of cable wetness, cable corrosion and cable failure have been recorded at interior protected buildings.

Left unattended this corrosion can lead to cable failure, serious cable eruptions from concrete floors and costly cable repair and replacement.

Downloadable Files

• Post-Tech Overview

• Post-Tech Corrosion
  Evaluation

• Post-Tech Cable Drying

• Post-Tech Grease Injection

• NRC Report

• Post-Tech Flyer

• Post-Tech Cable Break Detection

• Post-Tech Project Histories