Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Testing the durability of wood
Abstract The use of wood is limited due to its susceptibility to wood destroying organisms. If wet for long periods, wood will be attacked by fungi and the strength properties will decrease dramatically. To overcome this disadvantage, non-durable wood can be treated with preserving chemicals. When testing durability, it is essential that wood be exposed to all kinds of wood degrading organisms that can be expected in the intended exposure environment. The aim of this study was to evaluate the relevance of exposing test ttakes in terrestrial microcosms (TMC) as an alternative to existing test procedures to judge the durability of treated and untreated wood. Small stakes of treated and untreated pine (Pinus sylvestris) sapwood were exposed in TMCs with different soils. Stakes were also exposed to pure cultures of brown and white rot fungi. After exposure, mass losses were determined and stakes from the TMCs were analysed using light microscopy to determine the types of microbial attack. The effect of the preservatives varied depending on the exposure environment. It is concluded that testing the durability of untreated and treated wood with pure cultures of fungi is too limited a test to evaluate total effectiveness. Testing in TMCs represents a good complement to existing procedures and, after further development, an alternative to other laboratory and field tests.
Testing the durability of wood
Abstract The use of wood is limited due to its susceptibility to wood destroying organisms. If wet for long periods, wood will be attacked by fungi and the strength properties will decrease dramatically. To overcome this disadvantage, non-durable wood can be treated with preserving chemicals. When testing durability, it is essential that wood be exposed to all kinds of wood degrading organisms that can be expected in the intended exposure environment. The aim of this study was to evaluate the relevance of exposing test ttakes in terrestrial microcosms (TMC) as an alternative to existing test procedures to judge the durability of treated and untreated wood. Small stakes of treated and untreated pine (Pinus sylvestris) sapwood were exposed in TMCs with different soils. Stakes were also exposed to pure cultures of brown and white rot fungi. After exposure, mass losses were determined and stakes from the TMCs were analysed using light microscopy to determine the types of microbial attack. The effect of the preservatives varied depending on the exposure environment. It is concluded that testing the durability of untreated and treated wood with pure cultures of fungi is too limited a test to evaluate total effectiveness. Testing in TMCs represents a good complement to existing procedures and, after further development, an alternative to other laboratory and field tests.
Testing the durability of wood
Edlund, Marie-Louise (Autor:in) / Nilsson, Thomas (Autor:in)
1998
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Testing the durability of wood
| Springer Verlag | 1998
Testing the durability of wood
| Online Contents | 1998
Testing the durability of wood
| British Library Online Contents | 1998
TECHNICAL REPORTS - Testing the durability of wood
| Online Contents | 1998