Measuring and testing – Vibration – By mechanical waves
Patent
1998-10-19
2000-02-29
Williams, Hezron
Measuring and testing
Vibration
By mechanical waves
73584, 73 1201, G01N 2918, G01H 500
Patent
active
06029521&
ABSTRACT:
A method for measuring the cover thickness of a reinforcing bar in concrete. An impacting device and a receiver are disposed on the concrete surface along the longitudinal axis of the reinforcing bar with a predetermined distance H provided between the impacting device and the receiver. Then, an impact is applied on the concrete surface by the impacting device, to generate a dilatational wave which propagates into the concrete and is totally refracted at an interface between the concrete and the reinforcing bar, and is received by the receiver. Then, the cover thickness of the reinforcing bar is calculated according to the travel time for the dilatational wave from the impact device through the reinforcing bar to the receiver.
REFERENCES:
patent: 5165270 (1992-11-01), Sansalone et al.
patent: 5402781 (1995-04-01), Dimarogonas
patent: 5404755 (1995-04-01), Olson et al.
patent: 5438872 (1995-08-01), Kobayashi et al.
Lin et al., "Use of Stress Waves for Determining the Depth of Surface-Opening Cracks in Concrete Structures" ACI Materials Journal, Technical Paper Title No. 93-M57 vol. 93, No. 5, Sep.-Oct. 1996.
Wu et al., "A new method for measuring in situ concrete elastic constants using horizontally polarized conical transducers" J. Acoustical Society of America 101 (1) Jan. 1997, pp. 330-336.
Cheng Chia-Chi
Hsiao Chia-Men
Lin Yiching
Frank Robert J.
Kinberg Robert
Kwok Helen C.
National Science Council
Williams Hezron
LandOfFree
Method for measuring cover thickness of reinforcing bar in concr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for measuring cover thickness of reinforcing bar in concr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for measuring cover thickness of reinforcing bar in concr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-672764