00:33 Mar-29-2000 Re: NDT Inspection of Prestressing Tendon Systems in Pressurized Concrete Containments In the UK a 7.5m long 6mm dia videoscope is used for looking at the tendons of prestressed bridge supports in preperation for increasing the weight limit.
Tendons were failing through corrosion as incorrect grouting procedures were leaving the tendons exposed.
I am looking for an inspection process to determine cracking, corrosion, etc., of grouted prestressed tendons. The tendons consist of 19 x 0.62 inch diameter strands with access to the ends only.
UCI hardness tester NOVOTEST T-U2 is is used for non-destructive
hardness testing of:
alloys by scales of hardness: Rockwell (HRC), Brinell
(HB), Vickers (HV);
non-ferrous metals, alloys of iron etc., and using five additional
scales for calibration;
with tensile strength (Rm) scale determines the tensile strength
of carbon steel pearlitic products by automatic recalculation from
Brinell (HB) hardness scale.