NONDESTRUCTIVE TESTING OF WOOD USING NUCLEAR-MAGNETIC-RESONANCE (NMR)SPECTROSCOPY

This paper presents the results of a study utilising NMR to measure mo isture content and strength of wood. Different species of wood at diff erent moisture contents were evaluated. Standard destructive tests as well as non-destructive tests using NMR were conducted. Correlations w ere made between the results of destructive and non-destructive tests. As reported by other researchers also, an almost linear relationship was observed between the moisture content of wood and the intensity of magnetisation. Consistent trends were observed between the stress at failure of wood and the intensity of magnetisation of physical protons .