Thermal treatment of electrical poles

摘要: Thermal treatment is used to preserve the wood without any addition of toxic chemicals. This process increases dimensional stability and darkens color wood. The improvement resistance decay by thermal also often suggested in literature. However, some latest works contested if durability heat-treated improved when it contact with ground. objective this study was investigate possibility thermally treating electrical poles which are larger compared standard lumber. One applications for treated could be their use environmental sensitive areas (along rivers, example) as a replacement untreated western red cedar (WRC) more expensive. Green pre-dried pine (Pinus resinosa) jack banksiana) poles, both circular square cross-sections, were heated high temperatures under humid inert atmosphere. Operating parameters such maximum temperature, maintenance time at heating rate gas humidity varied order find most suitable conditions poles. tests showed that cracks formed during drying while only widened already existing cracks. shape seems promote crack formation period since directional dependence shrinking creates stresses A slight decrease flexibility increasing observed. protecting effect against oxidation importance application moderate large cross-sections demonstrated article. impact heat on pole will presented future publication.