Abstract
Many social infrastructures and buildings are built with concrete as an eternal structure. When the materials are used by woods, these materials have enough strength and proof stresses under enough environment. In addition, we may contribute to local production for local consumption. Also there are the advantage that the environmental conservation and the regional activation can expect. The building materials are susceptible on the local climatic condition and the wood particular service life are changed by temperature and the humidity. Therefore, we record a change by aging about strength of the wood as materials in this study and observe it about erosion of the corrosion. Furthermore, we analyze how woods change using the correspondence principle applied by a viscoelastic idea.
