Assessing the natural durability of different tropical timbers in soil-bed tests
Assessing the natural durability of different tropical timbers in soil-bed tests
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在土床测试中评估不同热带木材的自然耐久性
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
J. Corral
中科院分区：
文献类型：
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作者：
Serafín Colín;A. Carrillo;J. G. Rutiaga;Pablo López;R. Gabriel;J. Corral
由于土壤中大量的微生物，地面接触会加速木材的腐烂。在这项研究中，我们使用欧洲标准EN 807(2001)评估了七个热带物种的自然耐久性。我们在沙质、沙壤土和粘壤土中埋藏了黄檀、Cordia elaeagnoides、Swietenia humillis、Tabebuia Donell-smithii、Hura Polyandra、Enterolobium Cycarpum和Tabebuia roSea，以及温带树种Fagus sylvatica(作为对照)8、16、24和32周。我们通过测定样品的质量损失和弹性模量损失来评估样品的耐久性。根据所考虑的木材种类和土壤类型，结果有显著差异(p<；0.001)。格拉纳迪罗和刺参的耐久性最好，质量损失率分别为4.5%和6.5%，弹性模量损失率分别为4.5%和20.5%。马尾松、马尾松和马尾松的耐久性最差，分别为22.3-25%和35.8-59.8%。砂质粘壤土的腐蚀性最强，其次是粘壤土，最后是沙质土。
Ground contact speeds up timber decay because of the large number of microorganisms in soil. This study, we assessed the natural durability of seven tropical species using the European standard EN 807 (2001). We embedded samples of Dalbergia granadillo, Cordia elaeagnoides, Swietenia humillis, Tabebuia donell-smithii, Hura polyandra, Enterolobium cyclocarpum and Tabebuia rosea and temperate species Fagus sylvatica (as a control) in sandy, clay-sandy-loam and clay-loam for 8, 16, 24 and 32 weeks. We evaluated durability of the samples by determining the mass loss and modulus of elasticity (MOE) loss. The results varied significantly (p < 0.001) depending on timber species and soil type considered. The D. granadillo and C. elaeagnoides were the most durable, with mass losses of 4.5%, 6.5% and MOE losses of 4.5%, 20.5%, respectively. F. sylvatica, T. rosea and E. cyclocarpum samples were the least durable, with mass losses of 22.3-25% and MOE losses of 35.8-59.8%, respectively. Decay was most aggressive in sandy-clay-loam soil followed by the clay-loam soil and finally the sandy soil.