Properties of Mixed Species/Densities Cross Laminated Timber made of Rubberwood and Coconut Wood

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dc.contributor.authorSrivaro S
dc.contributor.authorLim H
dc.contributor.authorPasztory Z
dc.contributor.authorLi, Minghao
dc.date.accessioned2022-06-30T02:15:01Z
dc.date.available2022-06-30T02:15:01Z
dc.date.issued2022en
dc.date.updated2022-04-08T23:39:08Z
dc.description.abstractThe utilization of rubberwood (Hevea brasiliensis) and coconut wood (Cocos nucifera L.), the essential economic crops in Thailand and tropical countries, was proposed for manufacturing mixed species/density cross-laminated timber (CLT) for building construction. Six 3-layer CLT configurations, which are composed of either medium-density (600 – 799 kg/m3 ) rubberwood (MRB) or coconut wood (MCC) or high-density (800 – 999 kg/m3 ) coconut wood (HCC) laminations, were determined considering the mechanical properties and material costs. The outer layers of the control MCC CLT were replaced with either MRB or HCC to improve its mechanical properties, while either outer or core layers of the control MRB CLT were replaced with HCC to reduce its material cost. The material properties of the three wood types and the six CLT configurations were examined. The densities of the produced CLTs were not affected by the chosen manufacturing parameters showing a strong correlation to the lamination's density. From the bonding performance perspective, the mixed-species approach significantly increased the average wood failure percentage of the control MRB CLT. However, only the control MCC CLT achieved the average wood failure percentage greater than 80%, as required in North America's CLT standard. The compressive strength properties of the CLTs in their major strength directions, σclt, were governed by the outer laminations' parallel-to-grain compressive strength. Unlike softwood CLTs, neglecting the load sharing contribution of the core layer in the σclt estimation resulted in 15% underestimation. Rolling shear strength, τrs, was determined by the core laminations regardless of the CLT layups. MRB achieved the highest τrs followed by HCC and MCC, and all values were significantly larger than the common softwood used in CLT production. The results imply that the mixed species/densities approaches can effectively improve the mechanical properties of the coconut wood CLT and reduce the material cost of rubberwood CLT without compromising structural performance.en
dc.identifier.citationSrivaro S, Lim H, Li M, Pasztory Z (2022). Properties of Mixed Species/Densities Cross Laminated Timber made of Rubberwood and Coconut Wood. Structures.en
dc.identifier.issn2352-0124
dc.identifier.urihttps://hdl.handle.net/10092/103829
dc.language.isoenen
dc.rightsAll rights reserved unless otherwise stateden
dc.rights.urihttp://hdl.handle.net/10092/17651en
dc.subjectcross laminated timberen
dc.subjectrubberwooden
dc.subjectcoconut wooden
dc.subjectmixed speciesen
dc.subjectmixed densitiesen
dc.subject.anzsrc0905 Civil Engineeringen
dc.subject.anzsrc1202 Buildingen
dc.subject.anzsrcFields of Research::40 - Engineering::4016 - Materials engineering::401610 - Timber, pulp and paperen
dc.subject.anzsrcFields of Research::40 - Engineering::4005 - Civil engineering::400511 - Timber engineeringen
dc.subject.anzsrcFields of Research::40 - Engineering::4005 - Civil engineering::400505 - Construction materialsen
dc.subject.anzsrcFields of Research::33 - Built environment and design::3302 - Building::330206 - Building science, technologies and systemsen
dc.titleProperties of Mixed Species/Densities Cross Laminated Timber made of Rubberwood and Coconut Wooden
dc.typeJournal Articleen
uc.collegeFaculty of Engineering
uc.departmentCivil and Natural Resources Engineering
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