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原文传递 Ten-Year Performance of Treated Northeastern Softwoods in Aboveground and Ground-Contact Exposures

题名：	Ten-Year Performance of Treated Northeastern Softwoods in Aboveground and Ground-Contact Exposures
作者：	Douglas M. Crawford Rodney C. DeGroot Lee R. Gjovik
关键词：	CCA, ACA, deck, softwoods, incised
摘要：	The commercial value of several softwood species of the northeastern United States could be Increased if these woods could be treated to meet existing American Wood Preservers* Association (AWPA) Standards and used in durable structures. We evaluated the long-term durability of Incised and unincised white pine, red pine, eastern spruce, balsan fir, and eastern hemlock treated with ammoniacal copper arsenate (ACA) and ahromatd copper arsenate (CCA-Type C) The treated wood was exposed above ground and in ground contact in the southern and northeatern United States. Simulated decks were tested above ground in Cumberland, Maine. Replicates of all test species and conditions, including untreated controls, were represented in the test plots and decks. Both the stakes and deck material were monitored annually for structural condition and appearance. After 10 years of above ground exposure, all untreated decks (controls) failed as a result of decay. Wood treated with CCA showed somewhat better durability than did wood treated with ACA. Except for white pine, treated incised wood species showed no evidence of decay.
报告类型：	科技报告