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首页> 外文会议>Meeting of the American Wood Protection Association >Relationship Between Initial Treatment, Decay and Residual Material Properties of Chromated Copper Arsenate Treated Hem-fir Guardrail Posts after 20 Years inService in Western Washington State
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Relationship Between Initial Treatment, Decay and Residual Material Properties of Chromated Copper Arsenate Treated Hem-fir Guardrail Posts after 20 Years inService in Western Washington State

机译：在华盛顿州西方华盛顿州20年后染色铜砷化铜砷化铜的腐蚀和残留物性能之间的关系

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摘要

Wood guardrail posts are among the most common wood materials currently used in highway construction in the United States. Preservative treated hem-fir is an important species for guard-rail applications in the western United States. The service lifeof treated timber post guardrail systems has been estimated to be between 10-20 years which is extremely short in comparison with published field trials. However, there is surprisingly little information on performance these materials. The condition of chromated copper arsenate treated hem-fir guardrail posts removed from a project near Bellingham, WA was assessed by removing increment cores to measure preservative treatment, flexural testing to determine residual material properties and dissection to assess the degree of internal decay. Posts that met the AWPA Standards for preservative penetration trended to have lower levels of internal decay after 20 years in service and 86 of the 92 posts tested retained sufficient flexural properties to meet AASHTO Standards. The results indicated that guardrail posts continued to perform well even after 20 years of service in an environment with a moderately high decay risk.
机译：Wood Guardrail Posts是当前在美国公路建设中使用的最常见的木材。防腐剂处理过杉是美国西部防范轨道应用的重要种类。据估计，处理的木材后护栏系统的使用寿命在10 - 20年之间，与已发表的现场试验相比，这是非常短的。但是，有关这些材料的性能的令人惊讶的很少。通过去除增量芯来评估从Bellingham附近的项目中取出的铬酸铜砷化铜处理的下降护栏柱，以测量防腐剂处理，弯曲试验，以确定残留物质性能和解剖，以评估内部衰变程度。符合AWPA防腐标准的职位趋势趋势趋势趋势趋于较低的内部衰减后20年后的内部衰减，92个帖子中的86个检测到足够的弯曲物业以满足AASHTO标准。结果表明，即使在具有中度高衰减风险的环境中的服务中，监护员员额也继续表现良好。

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