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首页> 外文会议>Annual Meeting of the American^Wood^Protection^Association >Decay Hazards and Wood Protection Requirements Associated with Tropical and Other High Moisture Environments
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Decay Hazards and Wood Protection Requirements Associated with Tropical and Other High Moisture Environments

机译：与热带和其他高湿度环境相关的衰变危险和木材保护要求

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Wood decay requires suitable temperatures, adequate moisture, an acceptable substrate, and adequate oxygen to progress. It might seem obvious that tropical and other high moisture environments will increase the pressure on a wood substrate by providing suitable temperature and moisture conditions over longer periods of time, resulting in a higher challenge to wood protection systems. This paper provides data on the relative severity of decay observed in above ground and ground contact field tests ofwood preservative systems exposed at sites with tropical and non-tropical climates, as well as using test configurations designed to increase moisture conditions in the test samples. Performance in ground contact exposures is highly variable, with some preservative systems more susceptible to decay in tropical climates than non-tropical, while other systems show a reverse trend. Soil characteristics, including the presence or absence of preservative specific fungi such as copper tolerant fungi, can create much harsher exposures than would be expected based on the overall climate of the site. Above ground exposures are also much harsher on preservative systems when exposed in tropical than non-tropical climates, as well as when using designs that provide water traps and keep samples with favorable moisture conditions for longer time periods. Although the challenge to wood protection systems in above ground applications is greater in tropical and wet environments, these challenges do not appear to be as great as when the systems are used in ground contact at locations under which they are designed to perform.
机译：木材衰减需要适当的温度，适当的水分，可接受的基材和足够的氧气进展。显而易见的是，热带和其他高湿度环境将通过在较长时间内提供合适的温度和水分条件来增加木材基板上的压力，从而对木材保护系统产生更高的挑战。本文提供了有关在地面观察到的衰变的相对严重程度的数据，以及在具有热带和非热带气候的地点暴露的地上的地面和地面接触现场测试，以及使用设计配置来增加测试样品中的水分状况的测试配置。地面接触曝光的性能是高度变化的，一些防腐系统更容易受到热带气候中的腐烂而不是非热带的影响，而其他系统则表现出反向趋势。土壤特性，包括防腐剂特异性真菌如铜耐性真菌的存在或不存在，可以产生比基于现场整体气候的预期更加饱和的暴露。在热带上暴露于热带气候时，在热带暴露的防腐系统上，在接地曝光的情况下也是如此骚扰，以及使用提供水疏水阀的设计并使样品保持有利的水分条件，以便更长时间。尽管在热带和潮湿环境中对木材保护系统的挑战更大，但这些挑战似乎并不像系统在它们所设计的地面接触时使用的那样大。

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