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http://dx.doi.org/10.14190/JRCR.2015.3.4.320

Suggestion for Concrete Strength Grade Using Ultrasonic Velocity for Tunnel Lining Concrete  

Kang, Su-Tae (Department of Civil Engineering, Daegu University)
Lee, Bang-Yeon (School of Architecture, Chonnam National University)
Kwon, Seung-Jun (Department of Civil Engineering, Hannam University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.3, no.4, 2015 , pp. 320-327 More about this Journal
Abstract
This study implicates a quality evaluation technique for lining concrete using the ultra-sonic technique and proposed a classification for quality evaluation. From the comparison of test results, an improved result comparable to the results by destructive test can be obtained by using averaged transmission velocity of velocities obtained at pure space and central space between two sensors of ultrasonic tester. It is also shown that strength evaluation by ultra-sonic method is not reliable and an evaluation according to the transmission velocities can be improved method for the strength evaluation of concrete.
Keywords
Tunnel lining concrete; Ultra-sonic velocity method; Quality evaluation; Field test;
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