ULTRASONIC RELATIVE AMPLITUDE METHOD FOR PREDICTING THE STRENGTH OF CONCRETE
Mohamad Pauzi Ismail, Kamarudin Mohd. Yusof* and Abdul Nassir Ibrahim
Malaysian Institute for Nuclear Technology Research, Bangi, 43000 Kajang
* National University of Malaysia, 43600 UKM Bangi
Keywords: Ultrasonic Pulse velocity, Concrete quality, Relative amplitude method, Wave amplitude NDT
ABSTRACT The ultrasonic pulse velocity method is the most widely used ultrasonic nondestructive method for assessing concrete quality. It has been used to estimate concrete strength for over 40 years. However, the relation between strength and pulse velocity is in general, not reliable enough for practical purposes (Popovics 1992). This paper introduces an alternative method for estimating strength that is called the relative amplitude method. The relative amplitude method is basically an attenuation method which measure the ratio of the wave amplitudes. Experiment has been carried out to establish the relationship between concrete strength and relative amplitude. The correlation coefficient (R2) of the relationship is in the range of 0.8 to 0.95. Factors which influence the relationship are described and discussed.
Publication Source: Trends in NDE Science & Technology; Proceedings of the 14th World Conference on Non-Destructive Testing, New Delhi, 8-13 December 1996.Vol. 2, pages 857 - 862
Publisher: Ashgate Publishing Company
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