Studies on the durability performance of wood-based panels by the outdoor exposure tests

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Procedures for determining the durability performance of wooden composites increase its importance as a technology for estimating carbon sink. For this purpose, results obtained from the outdoor exposure tests at eight sites in Japan were used to evaluate the durability of wood-based panels. The relationship between five accelerated aging tests and 5-year out-door test was determined quantitatively. To eliminate regional differences in outdoor test results, we introduced"weathering intensity", a factor combined precipitation and temperature. This can be an indication of aging effect and can predict deterioration of the panels.