The units are portable, light weight and battery operated. The unit remotely transmits data back to a base station where the information is translated via customized software to see the position of the anomaly within the tendon.
Why was it developed?
During construction of complex bridges, tendons are filled in grout to prevent corrosion. But during grouting process, the grout tends to separate depending on grout’s quality, admixtures, pumping equipment and procedures. This separation result into low pH grout at tendon points and anchorage which made these locations susceptible to corrosion. Locating issues early in the tendons lifecycle and making repairs allows us to extend the service life of these tendons. Critical to the health and safety of the structures they support and the public that utilize these structures, it is important to conduct regular inspections.
Complex bridge inspections are incomplete without tendon testing and the visual subjective testing currently employed is just not adequate enough to ensure a structures safety. TendonScan® peers through the concrete and steel tendon and conducts the most accurate assessment to date of post tensioned tendons known of to date.