Research Information System
Construction and Building Materials, vol.262, 2020 (SCI-Expanded, Scopus)
In this study, elastic properties of naturally aged Black pine (Pinus nigra Arnold.) wood were determined using ultrasonic wave propagation and compression tests. Black pine timbers were stored in a yard without any protection, and exposed to rain, temperature, sunlight, wind, and other external factors for approximately ten years. Defect-free twenty-six-faced polyhedron and compression test samples were prepared from these timbers for non-destructive and destructive tests, respectively. Samples were acclimatized at a constant temperature of 20 ± 1 °C, and 45, 65 and 85% relative humidity. Tests were performed in a standard climate room. Young's and shear moduli of naturally aged wood were decreased with the increase in moisture, but Poisson's ratios were inconsistent with moisture. The coefficients of determination (R2) between static and dynamic values ranged from 0.77 to 0.81 and 0.8 to 0.83 for shear moduli and Young's moduli, respectively.