Q

What are the advantages / disadvantages of conducting Thermal Integrity Profiling (TIP) with Thermal Wire® cables versus with a thermal probe?

A

Advantages of Thermal Wire cables:

  • Local defects (e.g. necking or inclusion) are best detected early in the curing process, and the optimum time for detection is unknown a priori. Probe, testing would be attempted near that time to look for potential local defects, then performed a second time, near the time of peak temperature, for shape and cover evaluation. Thermal wire cables record the full temperature versus time history, which allows scanning the data for the optimum time for local defect detection and at peak temperature for shape and cover evaluation.
  • The Thermal Wire cables option simplifies scheduling and can further define the maturation process of the concrete (temperature vs time as well as depth);
  • In the United States, the installed cost of Thermal Wire cables is generally less than the cost of installed access tubes.
  • In the United Stes, shafts are often cast with access tubes for CSL, but often only a portion of the shafts are actually CSL tested due to the relatively high cost of CSL testing. With Thermal Wire cables installed, the cost of data collection is minimal and the cost to inspect the thermal profiles (produce a temperature versus time plot) is also minimal, allowing all shafts to be inspected for less cost that CSL testing on a random sample of shafts.
Disadvantages:
  • The thermal probe is re-usable and uses standard access tubes already commonly installed (assuming CSL is also specified); The embedded sensors are not reusable