POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)

The objective of this research was to determine the physical and mechanical properties of oriented strandboard (OSB) using strands of Cupressus glauca Lam., before and after a thermal treatment, as well as to evaluate the susceptibility of the boards to fungi attack. Boards with nominal density of 0...

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Autores principales:	Okino,E. Y. A, Teixeira,D. E, Del Menezzi,C. H. S
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2007
Materias:	oriented strandboard material properties thermal treatment biodeterioration
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2007000300001
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spelling	oai:scielo:S0718-221X20070003000012007-12-20POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)Okino,E. Y. ATeixeira,D. EDel Menezzi,C. H. S oriented strandboard material properties thermal treatment biodeterioration The objective of this research was to determine the physical and mechanical properties of oriented strandboard (OSB) using strands of Cupressus glauca Lam., before and after a thermal treatment, as well as to evaluate the susceptibility of the boards to fungi attack. Boards with nominal density of 0.70 g/cm³ were produced with 5% and 8% of urea-formaldehyde (UF) resin. Physical and mechanical properties were evaluated according to ASTM D 1037 (1991) standard and compared with CSA O437.0 and ANSI A.208.1 standards. All mechanical properties were higher than those values required by both standards, except the modulus of elasticity in parallel axis. The thermal treatment slightly reduced the modulus of elasticity and stress at proportional limit, both in perpendicular axis, however improved significantly dimensional stability. Dimensional stability of the treated OSB was improved at the lower resin level but did not reach the maximum value required by the Canadian standard. Biological assay showed that heat-treated cypress OSB exposed to P. sanguineus reduced mass loss from 39% to 50%, while for G. trabeum the reduction was from 40% to 49%. Post thermal treatment of manufactured OSB (190°C, 720 s) can be the recommended method to reduce the hygroscopicity without great effect on mechanical properties and to protect panels against these fungiinfo:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.9 n.3 20072007-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2007000300001en10.4067/S0718-221X2007000300001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	oriented strandboard material properties thermal treatment biodeterioration
spellingShingle	oriented strandboard material properties thermal treatment biodeterioration Okino,E. Y. A Teixeira,D. E Del Menezzi,C. H. S POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)
description	The objective of this research was to determine the physical and mechanical properties of oriented strandboard (OSB) using strands of Cupressus glauca Lam., before and after a thermal treatment, as well as to evaluate the susceptibility of the boards to fungi attack. Boards with nominal density of 0.70 g/cm³ were produced with 5% and 8% of urea-formaldehyde (UF) resin. Physical and mechanical properties were evaluated according to ASTM D 1037 (1991) standard and compared with CSA O437.0 and ANSI A.208.1 standards. All mechanical properties were higher than those values required by both standards, except the modulus of elasticity in parallel axis. The thermal treatment slightly reduced the modulus of elasticity and stress at proportional limit, both in perpendicular axis, however improved significantly dimensional stability. Dimensional stability of the treated OSB was improved at the lower resin level but did not reach the maximum value required by the Canadian standard. Biological assay showed that heat-treated cypress OSB exposed to P. sanguineus reduced mass loss from 39% to 50%, while for G. trabeum the reduction was from 40% to 49%. Post thermal treatment of manufactured OSB (190°C, 720 s) can be the recommended method to reduce the hygroscopicity without great effect on mechanical properties and to protect panels against these fungi
author	Okino,E. Y. A Teixeira,D. E Del Menezzi,C. H. S
author_facet	Okino,E. Y. A Teixeira,D. E Del Menezzi,C. H. S
author_sort	Okino,E. Y. A
title	POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)
title_short	POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)
title_full	POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)
title_fullStr	POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)
title_full_unstemmed	POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)
title_sort	post-thermal treatment of oriented strandboard (osb) made from cypress (cupressus glauca lam.)
publisher	Universidad del Bío-Bío
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2007000300001
work_keys_str_mv	AT okinoeya postthermaltreatmentoforientedstrandboardosbmadefromcypresscupressusglaucalam AT teixeirade postthermaltreatmentoforientedstrandboardosbmadefromcypresscupressusglaucalam AT delmenezzichs postthermaltreatmentoforientedstrandboardosbmadefromcypresscupressusglaucalam
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POST-THERMAL TREATMENT OF ORIENTED STRANDBOARD (OSB) MADE FROM CYPRESS (CUPRESSUS GLAUCA LAM.)

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