Mechanical Properties and Restoration of Wood Components with Epoxy Resin and Ethylene-Vinyl Acetate Resin
| Autor: | Po-Feng Lin, 林伯峰 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 Wood is a main construction material for traditional architecture. Although the traditional wooden architecture can’t be woken more than hundred years, it would be aging and decaying because of time and subjected to climatic factors, which lead to cause damage on the architecture. Therefore, preservation and restoration of traditional architecture will be the most important work to protect the national continuation of cultural heritage preservation and promote science and technology. This study uses different adhesives to reinforce on the damaged wooden materials which are fir for China fir and broadleaf species of camphor tree specimens. The experiment uses the thermosetting, which was epoxy-based adhesives, and 2 thermoplastic adhesives, which are ethylene-vinyl acetate systems hot melt adhesive to repair. Due to chemical bonding between the wood and different adhesives, the different levels will cause damage to the strength of different materials. Therefore, this study wants to find the impact of mechanical properties of different adhesives repaired specimens. The results of this study in terms of camphor wood, the MOE of epoxy repaired specimens are 63,247 kgf/cm2. And the result of the MOE in specimens which were repaired by two EVA-system adhesives was 57,541 kgf / cm2 and 54,601 kgf/cm2. Although the epoxy resin repair of camphor wood is better than the other two EVA-system hot melt adhesives, the analysis of variance can know that there was no significant difference between epoxy resin and one of the EVA-system hot melt adhesive in MOE. In the MOR is also presented in the same results. In the China fir specimen, the MOE of epoxy repaired specimens is 84,130 kgf/cm2. And the result of the MOE in specimens which were repaired by two EVA-system adhesives was 69,387 kgf / cm2 and 63,552 kgf/cm2. And there was a significant difference between epoxy resin and one of the EVA-system hot melt adhesive in MOE. The MOR of epoxy repaired specimens is 642 kgf/cm2. And the MOR of two EVA-system hot melt adhesives repaired specimens were 582 kgf/cm2 and 599 kgf/cm2. Although the epoxy resin repair of camphor wood is better than the other two EVA-system hot melt adhesives. In the analysis of variance we can know that: there was no significant difference between epoxy resin and one of the EVA-system hot melt adhesive in MOR. These results show that although the repair of epoxy resin in wooden specimen was better than EVA-system adhesive, there are some patches on the effectiveness. Therefore, restoration of wood components by hot melt method is its feasibility. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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