Condition Assessment of PC Tendon Duct Filling by Elastic Wave Velocity Mapping

Table 1

Set of travel time from source to sensors at locations “𝑥”, “𝑦”, and “𝑧”.

Distance (mm)	Travel time (ms)		Percentage different between 1 mm and 10 mm thick aluminium (%)
	With 1 mm thick aluminium	With 10 mm thick aluminium
640.312 (source to sensor 𝑥)	0.153	0.141	8.511
707.107 (source to sensor 𝑦)	0.173	0.159	8.805
640.312 (source to sensor 𝑧)	0.153	0.141	8.511