Decay-influencing factors: A basis for service life prediction of wood and wood-based products

Abstract

The need for a reliable database and a corresponding methodology to predict service life of wood and wood-based products emanates from the European Construction Products Directive, as well as from a strong interest by the building industry. A literature review on decay-influencing factors and on previous approaches to implement methods and tools for service life estimations was the basis for a concept for service life prediction of wooden components. The effect of various indirect decay factors was found to be reducible to a few direct decay factors, with material resistance, as well as wood moisture content, wood temperature and their dynamics among the key factors for fungal decay. Approaches that consider only indirect factors, e.g. climate indices, suffer from poor correlation with service life or decay rates. Therefore, the overall consideration of all possible influences, reduced on the key direct decay factors in first instance, is recommended. To fill a theoretical model with a reliable database, various data sources need to be considered, in decreasing order of priority: in-service performance, field test data, laboratory test data, survey analysis and expert opinion.     

高职院校园林技术专业实践教学社会服务模式初探——以唐山职业技术学院为例

为了提高高职院校园林技术专业人才对社会需求的适应能力,以岗位需求为导向,以能力培养为基本目标,以唐山职业技术学院园林技术专业实践教学为例,探讨社会服务新模式在实践教学中的开展和作用。