Evaluation of Pin Penetration Probing Technique for the Assessment of‎ Basic Density in Air-dried Wood

Ebrahim Khosravi, Mehran Roohnia, Amir Lashgari, Ahmad Jahanlatibari, Ajang Tajdini


Fast and accurate evaluation of the physical and mechanical properties of engineering ‎materials is of particular importance. The in situ semi-destructive and non-destructive tests versus the ‎static tests for determining the time-consuming physical properties have replaced many traditional ‎methods with reasonable accuracies. Determining the density as one of ‎the most important qualitative and quantitative parameters in the inspection of wood and wood-based ‎products is of great importance. For this purpose, 33 wood specimens from 11 species with varying densities were tested by pin penetration probing. Results were compared with those from ‎the basic density values from traditional methods. The results showed an exponential relationship between the pin penetration depths ‎and the basic density considering the moisture conditions but without any problems. The coefficients of ‎determination while estimating the equality of the basic density via pin penetration probing with the actual ‎basic density for both the testing specimens and the control samples were always over ‎‎0.8. Henceforth, this methodology suggested that the density evaluation could inspire higher precision than what has been achieved in previous efforts.


Density; Exponential relationship; Non-destructive; Pin penetration; Wood

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