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\n\n \n \n \n \n \n \n The effect of weathering on the surface moisture conditions of Norway spruce under outdoor exposure.\n \n \n \n \n\n\n \n Niklewski, J.; Van Niekerk, P. B.; and Marais, B. N.\n\n\n \n\n\n\n
Wood Material Science & Engineering,1–11. December 2022.\n
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\n\n \n \n Paper\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n\n\n\n
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@article{niklewski_effect_2022,\n\ttitle = {The effect of weathering on the surface moisture conditions of {Norway} spruce under outdoor exposure},\n\tissn = {1748-0272, 1748-0280},\n\turl = {https://www.tandfonline.com/doi/full/10.1080/17480272.2022.2144444},\n\tdoi = {10.1080/17480272.2022.2144444},\n\tabstract = {Life-Cycle-Costing (LCC) is one of the basic indicators for the assessment of sustainability and cost effectiveness in construction applications. Project WoodLCC was thus conceived to enable LCC through input from models for detailed service life planning of wooden components and buildings. The project is a continuation of the service life planning research conducted in Europe over the last three decades, specifically applicable to wooden constructions. The novelty of WoodLCC lies in the optimisation of input data required for LCC of wood-based building components. Instead of generic data, the service life of wooden building components will be assessed with novel methods including performance models that account for fungal and weathering ‘damage’, which take climate, design, and use conditions into consideration. Service life estimates will be linked to consumer acceptance thresholds of planners, house builders and owners.},\n\tlanguage = {en},\n\turldate = {2023-06-15},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Niklewski, Jonas and Van Niekerk, Philip Bester and Marais, Brendan Nicholas},\n\tmonth = dec,\n\tyear = {2022},\n\tpages = {1--11},\n\tfile = {Niklewski et al. - 2022 - The effect of weathering on the surface moisture c.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\3PJ8QVQD\\\\Niklewski et al. - 2022 - The effect of weathering on the surface moisture c.pdf:application/pdf},\n}\n\n
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\n Life-Cycle-Costing (LCC) is one of the basic indicators for the assessment of sustainability and cost effectiveness in construction applications. Project WoodLCC was thus conceived to enable LCC through input from models for detailed service life planning of wooden components and buildings. The project is a continuation of the service life planning research conducted in Europe over the last three decades, specifically applicable to wooden constructions. The novelty of WoodLCC lies in the optimisation of input data required for LCC of wood-based building components. Instead of generic data, the service life of wooden building components will be assessed with novel methods including performance models that account for fungal and weathering ‘damage’, which take climate, design, and use conditions into consideration. Service life estimates will be linked to consumer acceptance thresholds of planners, house builders and owners.\n
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\n\n \n \n \n \n \n Laminated Veneer Lumber Made From Cement-Impregnated Veneers.\n \n \n \n\n\n \n Hirschmüller, S.; Kovryga, A.; Unterberger, S.; Larbig, H.; Marais, B.; Brischke, C.; van de Kuilen, J.; and Krey, A.\n\n\n \n\n\n\n In
Proceedings of 10th European Conference on Wood Modification, pages 108–111, Nancy, France, April 2022. University of Lorraine\n
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\n\n \n\n \n\n \n link\n \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n\n\n\n
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@inproceedings{hirschmuller_laminated_2022,\n\taddress = {Nancy, France},\n\ttitle = {Laminated {Veneer} {Lumber} {Made} {From} {Cement}-{Impregnated} {Veneers}},\n\tisbn = {978-2-37111-000-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of 10th {European} {Conference} on {Wood} {Modification}},\n\tpublisher = {University of Lorraine},\n\tauthor = {Hirschmüller, S. and Kovryga, A. and Unterberger, S. and Larbig, H. and Marais, B. and Brischke, C. and van de Kuilen, J.-W. and Krey, A.},\n\tmonth = apr,\n\tyear = {2022},\n\tpages = {108--111},\n}\n\n
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\n\n \n \n \n \n \n \n Wood durability in terrestrial and aquatic environments – A review of biotic and abiotic influence factors.\n \n \n \n \n\n\n \n Marais, B. N.; Brischke, C.; and Militz, H.\n\n\n \n\n\n\n
Wood Material Science & Engineering, 17(2): 82–105. 2022.\n
Publisher: Taylor & Francis _eprint: https://doi.org/10.1080/17480272.2020.1779810\n\n
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\n\n \n \n Paper\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{marais_wood_2022,\n\ttitle = {Wood durability in terrestrial and aquatic environments – {A} review of biotic and abiotic influence factors},\n\tvolume = {17},\n\tissn = {1748-0272},\n\turl = {https://doi.org/10.1080/17480272.2020.1779810},\n\tdoi = {10.1080/17480272.2020.1779810},\n\tabstract = {Factors relevant to degradation are important in every wood application. For wood used in ground and water contact; well documented abiotic factors (or agents) include exposure to temperature and moisture linked to the physiological requirements of biotic degradation agents such as wood-decaying fungi and bacteria. Other biotic degradation agents such as subterranean insects and marine borers occur overshadowing the effect of fungal and bacterial decay, but are restricted in geographical distribution and to aquatic applications, respectively. This review focusses on decay specific to soil exposure. The inherent material characteristics are important to durability in that heartwood and sapwood show differences in resistance to degradation between species, provenance, and individual trees. Wood durability testing methods and classification, as well as a summary of prominent models and variables suitable for regional-level modelling of in-ground wood durability are presented.},\n\tnumber = {2},\n\turldate = {2022-03-17},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Marais, Brendan Nicholas and Brischke, Christian and Militz, Holger},\n\tyear = {2022},\n\tnote = {Publisher: Taylor \\& Francis\n\\_eprint: https://doi.org/10.1080/17480272.2020.1779810},\n\tkeywords = {fungi, bacteria, marine environment, soil contact, Decay, freshwater contact},\n\tpages = {82--105},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\IL39GT2D\\\\Marais et al. - 2022 - Wood durability in terrestrial and aquatic environ.pdf:application/pdf},\n}\n\n
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\n Factors relevant to degradation are important in every wood application. For wood used in ground and water contact; well documented abiotic factors (or agents) include exposure to temperature and moisture linked to the physiological requirements of biotic degradation agents such as wood-decaying fungi and bacteria. Other biotic degradation agents such as subterranean insects and marine borers occur overshadowing the effect of fungal and bacterial decay, but are restricted in geographical distribution and to aquatic applications, respectively. This review focusses on decay specific to soil exposure. The inherent material characteristics are important to durability in that heartwood and sapwood show differences in resistance to degradation between species, provenance, and individual trees. Wood durability testing methods and classification, as well as a summary of prominent models and variables suitable for regional-level modelling of in-ground wood durability are presented.\n
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\n\n \n \n \n \n \n \n Mapping the biotic degradation hazard of wood in Europe – biophysical background, engineering applications, and climate change-induced prospects.\n \n \n \n \n\n\n \n van Niekerk, P. B.; Marais, B. N.; Brischke, C.; Borges, L. M.; Kutnik, M.; Niklewski, J.; Ansard, D.; Humar, M.; Cragg, S. M.; and Militz, H.\n\n\n \n\n\n\n
Holzforschung, 76(2): 188–210. February 2022.\n
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\n\n \n \n Paper\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{van_niekerk_mapping_2022,\n\ttitle = {Mapping the biotic degradation hazard of wood in {Europe} – biophysical background, engineering applications, and climate change-induced prospects},\n\tvolume = {76},\n\tissn = {0018-3830, 1437-434X},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2021-0169/html},\n\tdoi = {10.1515/hf-2021-0169},\n\tabstract = {Abstract\n \n Construction using timber has seen a resurgence in light of global climate mitigation policies. Wood is a renewable resource, and engineered wood products are proving to be competitive against concrete and steel while having several advantages. However, while the renewable nature of wood in construction is a beneficial property for climate mitigation policies, the process of biodegradation introduces a challenge for service life planning. A review of hazard mapping is presented while developing contemporary hazard maps, occurrence maps and projected hazard maps for 2050 using representative concentration pathways (\n RCP\n ) 2.6 and 8.5. The risk of timber decay is expected to increase in most of Europe as the temperatures rise, with a decrease expected in dryer regions. Termites are likely to experience a range expansion as more areas become suitable, while human activity and an increase in extreme weather events like floods are expected to facilitate dispersion. Marine borer species already present a risk in most European coastal regions; however, the effect of changes in water temperatures are likely to shift the boundaries for individual borer species. Overall, warmer climates are expected to increase the metabolic activity of all of these organisms leading to a general reduction in service life.},\n\tlanguage = {en},\n\tnumber = {2},\n\turldate = {2022-02-09},\n\tjournal = {Holzforschung},\n\tauthor = {van Niekerk, Philip B. and Marais, Brendan N. and Brischke, Christian and Borges, Luisa M.S. and Kutnik, Magdalena and Niklewski, Jonas and Ansard, David and Humar, Miha and Cragg, Simon M. and Militz, Holger},\n\tmonth = feb,\n\tyear = {2022},\n\tkeywords = {fungi, termites, marine borers, service life prediction, decay risk, exposure model},\n\tpages = {188--210},\n\tfile = {van Niekerk et al. - 2021 - Mapping the biotic degradation hazard of wood in E.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\SLNQ2G7F\\\\van Niekerk et al. - 2021 - Mapping the biotic degradation hazard of wood in E.pdf:application/pdf},\n}\n\n
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\n Abstract Construction using timber has seen a resurgence in light of global climate mitigation policies. Wood is a renewable resource, and engineered wood products are proving to be competitive against concrete and steel while having several advantages. However, while the renewable nature of wood in construction is a beneficial property for climate mitigation policies, the process of biodegradation introduces a challenge for service life planning. A review of hazard mapping is presented while developing contemporary hazard maps, occurrence maps and projected hazard maps for 2050 using representative concentration pathways ( RCP ) 2.6 and 8.5. The risk of timber decay is expected to increase in most of Europe as the temperatures rise, with a decrease expected in dryer regions. Termites are likely to experience a range expansion as more areas become suitable, while human activity and an increase in extreme weather events like floods are expected to facilitate dispersion. Marine borer species already present a risk in most European coastal regions; however, the effect of changes in water temperatures are likely to shift the boundaries for individual borer species. Overall, warmer climates are expected to increase the metabolic activity of all of these organisms leading to a general reduction in service life.\n
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\n\n \n \n \n \n \n \n The effect of weathering on the surface moisture conditions of Norway spruce under outdoor exposure.\n \n \n \n \n\n\n \n Niklewski, J.; van Niekerk, P. B.; and Marais, B. N.\n\n\n \n\n\n\n
Wood Material Science & Engineering, 0(0): 1–11. December 2022.\n
Publisher: Taylor & Francis _eprint: https://doi.org/10.1080/17480272.2022.2144444\n\n
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\n\n \n \n Paper\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{niklewski_effect_2022-1,\n\ttitle = {The effect of weathering on the surface moisture conditions of {Norway} spruce under outdoor exposure},\n\tvolume = {0},\n\tissn = {1748-0272},\n\turl = {https://doi.org/10.1080/17480272.2022.2144444},\n\tdoi = {10.1080/17480272.2022.2144444},\n\tabstract = {Understanding wood surface moisture variations is fundamental to the modelling of moisture content. Exposure to sunlight, fluctuating temperature and rain leads to superficial deterioration and reduced surface hydrophobicity. Here, the effect of weathering was studied through monitoring the surface and global moisture content of axially matched pre-weathered and planed sets of specimens exposed outdoors over 18 months. The difference in surface conditions was characterised by analysing the rain-induced peaks. The results suggest that, following precipitation, weathered surfaces remain wet over a longer time period. No effect was observed through the global moisture content. After one year of exposure, the difference between pre-weathered and planed surfaces was small to insignificant. In service life modelling, it is therefore unnecessary to consider the unweathered state and simulations should target the behaviour of weathered wood. Numerical simulations were able to capture the general behaviour of the surface and global moisture content, but discrepancies over individual peaks were observed. Finally, the study demonstrates how peak analysis and signal analysis can be used for isolating subtle differences between time-series of surface moisture content. The same techniques can be used in future studies to characterise other factors influencing surface conditions, such as wood species and detailing.},\n\tnumber = {0},\n\turldate = {2022-12-14},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Niklewski, Jonas and van Niekerk, Philip Bester and Marais, Brendan Nicholas},\n\tmonth = dec,\n\tyear = {2022},\n\tnote = {Publisher: Taylor \\& Francis\n\\_eprint: https://doi.org/10.1080/17480272.2022.2144444},\n\tkeywords = {weathering, moisture content, Wood, measurements, surface conditions},\n\tpages = {1--11},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\HYF4Q2FB\\\\Niklewski et al. - 2022 - The effect of weathering on the surface moisture c.pdf:application/pdf},\n}\n\n
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\n Understanding wood surface moisture variations is fundamental to the modelling of moisture content. Exposure to sunlight, fluctuating temperature and rain leads to superficial deterioration and reduced surface hydrophobicity. Here, the effect of weathering was studied through monitoring the surface and global moisture content of axially matched pre-weathered and planed sets of specimens exposed outdoors over 18 months. The difference in surface conditions was characterised by analysing the rain-induced peaks. The results suggest that, following precipitation, weathered surfaces remain wet over a longer time period. No effect was observed through the global moisture content. After one year of exposure, the difference between pre-weathered and planed surfaces was small to insignificant. In service life modelling, it is therefore unnecessary to consider the unweathered state and simulations should target the behaviour of weathered wood. Numerical simulations were able to capture the general behaviour of the surface and global moisture content, but discrepancies over individual peaks were observed. Finally, the study demonstrates how peak analysis and signal analysis can be used for isolating subtle differences between time-series of surface moisture content. The same techniques can be used in future studies to characterise other factors influencing surface conditions, such as wood species and detailing.\n
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\n\n \n \n \n \n \n Dauerhaftigkeit im Erdkontakt – Einfluss von Feuchte, Temperatur und biologischer Bodenaktivität.\n \n \n \n\n\n \n Marais, B. N.\n\n\n \n\n\n\n In
31. Deutsche Holzschutztagung, Dresden, Germany, 2022. \n
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@inproceedings{marais_dauerhaftigkeit_2022,\n\taddress = {Dresden, Germany},\n\ttitle = {Dauerhaftigkeit im {Erdkontakt} – {Einfluss} von {Feuchte}, {Temperatur} und biologischer {Bodenaktivität}},\n\tbooktitle = {31. {Deutsche} {Holzschutztagung}},\n\tauthor = {Marais, Brendan N.},\n\tyear = {2022},\n}\n\n
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\n\n \n \n \n \n \n Simulations of microclimates for wood-decaying fungi in the built environment using environmental analysis.\n \n \n \n\n\n \n Van Niekerk, P.; Niklewski, J.; Hosseini, S. H.; Marais, B. N.; Frimannslund, I.; Kringlebotn Thiis, T; and Brischke, C.\n\n\n \n\n\n\n In
Proceedings IRG Annual Meeting, Bled, Slovenia, May 2022. \n
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@inproceedings{van_niekerk_simulations_2022,\n\taddress = {Bled, Slovenia},\n\ttitle = {Simulations of microclimates for wood-decaying fungi in the built environment using environmental analysis},\n\tdoi = {IRG/WP 23-20703},\n\tlanguage = {En},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Van Niekerk, P.B. and Niklewski, J. and Hosseini, S. H. and Marais, B. N. and Frimannslund, I. and Kringlebotn Thiis, T and Brischke, C.},\n\tmonth = may,\n\tyear = {2022},\n}\n\n
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\n\n \n \n \n \n \n Using satellite-retrieved soil moisture data to model the decay risk of in-ground timber.\n \n \n \n\n\n \n Van Niekerk, P.; Schönauer, M.; Marais, B. N.; and Brischke, C.\n\n\n \n\n\n\n In
Proceedings IRG Annual Meeting, Bled, Slovenia, May 2022. \n
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@inproceedings{van_niekerk_using_2022,\n\taddress = {Bled, Slovenia},\n\ttitle = {Using satellite-retrieved soil moisture data to model the decay risk of in-ground timber},\n\tdoi = {IRG/WP 22-20689},\n\tlanguage = {En},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Van Niekerk, P.B. and Schönauer, M. and Marais, B. N. and Brischke, C.},\n\tmonth = may,\n\tyear = {2022},\n}\n\n
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\n\n \n \n \n \n \n Studies into the effect of soil type and soil layer on the in-ground decay of European beech.\n \n \n \n\n\n \n Marais, B. N.; Kovacs, S.; Jansen, M.; and Brischke, C.\n\n\n \n\n\n\n In
Proceedings IRG Annual Meeting, Bled, Slovenia, May 2022. \n
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@inproceedings{marais_studies_2022,\n\taddress = {Bled, Slovenia},\n\ttitle = {Studies into the effect of soil type and soil layer on the in-ground decay of {European} beech},\n\tdoi = {IRG/WP 22-20681},\n\tlanguage = {En},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Marais, B. N. and Kovacs, S. and Jansen, M. and Brischke, C.},\n\tmonth = may,\n\tyear = {2022},\n}\n
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