ISSN: 0149-6123
Page Count: 3

New Test for Determining Fundamental Frequencies of Concrete
Rosenberg, AM
Research associate and research manager, Washington Research Center, W. R. Grace and Co., MD

Gaidis, JM
Research associate and research manager, Washington Research Center, W. R. Grace and Co., MD

Abstract

The standard methods for determining fundamental frequencies of concrete specimens (ASTM Test Method for Fundamental Transverse, Longitudinal and Torsional Frequencies of Concrete Specimens [C 215]) can be markedly improved by using modern electronic equipment. In the new method, a small accelerometer pickup senses the vibrations of a concrete specimen after it is lightly struck, and a spectrum analyzer portrays the information in the frequency domain. The main advantages of the new method are speed, ability to test small specimens, and no noise; the chief disadvantage is higher equipment cost.

Keywords:
concretes, durability, freeze-thaw testing, fundamental frequency, nondestructive testing, resonant frequency, sonic modulus, sonic tests

Paper ID: CCA10065J
DOI: 10.1520/CCA10065J
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