Materiales de Construcción, Vol 36, No 202 (1986)

New test for determining fundamental transverse, longitudinal and torsional frequencies of concrete specimens


https://doi.org/10.3989/mc.1986.v36.i202.894

J. M. Gaidis

A. H. Rosemberg

Abstract


For twenty-five years The ASTM method used to determine reductions in concrete durability after freeze-thaw cycling has been C215-60. In this test the fundamental frequencies of a concrete specimen are compared. This test is time consuming, noisy and often inaccurate. In this paper a new method is proposed for measuring the fundamental frequencies of concrete to a single tap via a Fast Fourier Transform. The new test is faster, simpler and more accurate.

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Copyright (c) 1986 Consejo Superior de Investigaciones Científicas (CSIC)

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