Abstract
The objective of this study, to investigate decay resistance against Pleurotus ostreatus and Coniophora puteana fungus of heat-treated (ThermoWood method) Scotch pine, oak and beech wood species. Scotch pine (Pinus sylvestris), oak (Quercus petreae) and beech (Fagus orientalis) wood species were heat treated at 190°C for 2 h, 212°C for 1 h and 2 h by the ThermoWood® method. Untreated and heat-treated specimens were exposed to white-rot fungus (Pleurotus ostreatus) and brown-rot fungus (Coniophora puteana) for 12 weeks according to procedures defined in JIS K 1571 standard. After weight losses of all specimens were calculated. According to the results, least weight loss was determined on heat treated at 212°C for 2 h. Heat treatment can be used effectively against fungal attack for Scotch pine, oak and beech wood species.
Highlights
Heat treatments have proven to be effective in the reduction of the decay promoted by rot fungus
Similar results were recently presented by Sivrikaya et al (2015) that reported that even for a treatment at 210oC the mass loss of heat treated Spruce and Ash due to the white rot Trametes versicolor was higher than 5% while the mass loss due to Coniophora puteana was lower than 2%
The same was presented by Tjeerdsma et al (2000) who studied the increase of the resistance to soft rot, white rot (Trametes versicolor), and brown rot (Coniophora puteana) of heat treated Pinus sylvestris, Picea abies, Pinus radiata, and Pseudotsuga menziesii and concluded that the best performance was achieved for brown rot
Summary
Universidad del B í o - B í o since mass losses of untreated spruce and Scotch pine were respectively 67% and 60%. Similar results were presented by Esteves et al (2014) with heat treated pine (Pinus pinaster) that reported that a significant increase in durability against Rhodonia placenta found for both heartwood and sapwood at the higher temperature (200 oC), at the lower temperature (190 oC) only heartwood showed good results. Similar results were recently presented by Sivrikaya et al (2015) that reported that even for a treatment at 210oC the mass loss of heat treated Spruce and Ash due to the white rot Trametes versicolor was higher than 5% while the mass loss due to Coniophora puteana was lower than 2%. This work intended to study the improvements by heat treatment on the decay by two common fungus in Turkey, a white rot (Pleurotus ostreatus) and a brown rot (Coniophora puteana) on heat treated Scotch pine (Pinus sylvestris), oak (Quercus petreae) and beech (Fagus orientalis)
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