The prospect of manufacturing durable structural laminated wood with copper and boron-based preservative-impregnated Eucalyptus grandis wood was previously investigated but revealed adhesive-bond performance below standard requirements. In this study, bonding process factors, viz. mechanical pretreatment (surface planing) and bonding pressure in conjunction with wood preservative and adhesive compatibility for improved bond performance in preservative-treated E. grandis laminates were investigated. The results obtained showed significant and satisfactory improvement in shear strength and delamination resistance of E. grandis laminates based on EN 14080:2013 [Timber structures — Glued laminated timber and glued solid timber — Requirements, BSI Stand. Publ. (2014) 1–110] requirements. The suitability of polyurethane, melamine-urea-formaldehyde, and phenol-resorcinol-formaldehyde adhesives for bonding copper azole (CA) and disodium octaborate tetrahydrate (DOT)-impregnated E. grandis wood was established. Satisfactory pathways, including greener process routes for manufacturing CA and DOT-impregnated E. grandis laminates for structural applications in tropical and subtropical climes were achieved. The established processes could be readily adopted industrially to enhance the global implementation of solid wood composites and promote hardwood bonding.
AladeAA.2021 An investigation into the effect of durability treatment on adhesive bonding of Eucalyptus grandis wood, e-theses/e-dissertations, Stellenbosch University, Stellenbosch, South Africa, 2021. https://scholar.sun.ac.za.
2.
AladeAA, NaghizadehZ, WesselsCB.2021. A new method for estimating wood failure percentage in adhesive-bonded shear specimens. Int J Adhes. Adhes. 112:103028. doi:10.1016/j.ijadhadh.2021.103028.
3.
AladeAA, NaghizadehZ, WesselsCB, StolzeH, MilitzH.2022a. Adhesion performance of melamine-urea–formaldehyde joints of copper azole-treated Eucalyptus grandis at varied bonding process conditions. Constr Build Mater. 314:125682. doi:10.1016/j.conbuildmat.2021.125682.
4.
AladeAA, NaghizadehZ, WesselsCB, StolzeH, MilitzH.2022b. Compatibility of preservative with adhesive in Eucalyptus grandis laminates. Int Wood Prod J. 13(1):57–69. doi:10.1080/20426445.2021.2018101.
5.
AladeAA, NaghizadehZ, WesselsCB, TyhodaL.2021. A review of the effects of wood preservative impregnation on adhesive bonding and joint performance. J Adhes Sci Technol. doi:10.1080/01694243.2021.1981651.
6.
ASTM D5266 - 99. (Reapproved 2005), Standard practice for estimating the percentage of wood failure in adhesive bonded joints (2005) 4. https://doi.org/10.1520/D5266-99R05.
7.
ASTM D905 - 08, Standard test method for strength properties of adhesive bonds in shear by compression loading. 2008. 5. https://doi.org/10.1520/D0905-08E01.
8.
AvramidisG, HauswaldE, LyapinA, MilitzH, ViölW, WolkenhauerA.2009. Plasma treatment of wood and wood-based materials to generate hydrophilic or hydrophobic surface characteristics. Wood Mater Sci Eng. 4:52–60. doi:10.1080/17480270903281642.
9.
AydinI.2004. Activation of wood surfaces for glue bonds by mechanical pre-treatment and its effects on some properties of veneer surfaces and plywood panels. Appl Surf Sci. 233:268–274. doi:10.1016/j.apsusc.2004.03.230.
10.
AydinI, ColakogluG.2007. Variation in surface roughness, wettability and some plywood properties after preservative treatment with boron compounds. Build Environ. 42:3837–3840. doi:10.1016/j.buildenv.2006.11.009.
11.
BaldanA.2004. Adhesively-bonded joints and repairs in metallic alloys, polymers and composite materials: adhesives, adhesion theories and surface pretreatment. J Mater Sci. 39:1–49. doi:10.1023/B:JMSC.0000007726.58758.e4.
12.
BockelS, MayerI, KonnerthJ, HarlingS, NiemzP, SwabodaC, BeyerM, BieriN, WeilandG, PichelinF.2019. The role of wood extractives in structural hardwood bonding and their influence on different adhesive systems. Int J Adhes Adhes. 91:43–53. doi:10.1016/j.ijadhadh.2019.03.001.
13.
CraffordPL, WesselsCB.2016. The potential of young, green finger-jointed Eucalyptus grandis lumber for roof truss manufacturing. South For J For Sci. 78:61–71. doi:10.2989/20702620.2015.1108618.
14.
DugmoreM, NocettiM, BrunettiM, NaghizadehZ, WesselsCB.2019. Bonding quality of cross-laminated timber: evaluation of test methods on Eucalyptus grandis panels. Constr Build Mater. 211:217–227. doi:10.1016/j.conbuildmat.2019.03.240.
15.
EN 14080:2013. Timber structures – glued laminated timber and glued solid timber – requirements, BSI Stand. Publ. (2014) 1–110.
16.
FangQ, CuiHW, Ben DuG.2016. Surface wettability, surface free energy, and surface adhesion of microwave plasma-treated pinus yunnanensis wood. Wood Sci Technol. 50:285–296. doi:10.1007/s00226-015-0793-x.
17.
FrihartCR.2003. Interaction of copper wood preservatives and adhesives. 26th annual meeting of the adhesion Society Inc. adhesion fundamental from molecular to mechanical modelling, pp. 244–245. https://www.fpl.fs.fed.us/documnts/pdf2003/friha03a.pdf.
18.
FrihartCR, HuntCG, Adhesives with wood materials: bond formation and performance, in: Wood handb. – wood as an Eng. mater., US department of agriculture, forest service, forest product laboratory, Madison, 2010: pp. 228–252.
19.
GonyaANS.2020 An investigation into shrinkage and collapse behavior of Eucalyptus grandis and Eucalyptus grandis x urophylla wood, e-theses/e-dissertations, Stellenbosch University, Stellenbosch, South Africa, 2020. https://scholar.sun.ac.za.
20.
HanimAR, ZaidonA, AboodF, AnwarUMK.2010. Adhesion and bonding characteristics of preservative-treated bamboo (Gigantochloa scortechinii) laminates.pdf. Appl. Sci. 10:1435–1441.
21.
KinataSE, LoubarK, BouslamtiA, BelloncleC, TazeroutM.2012. Influence of impregnation method on metal retention of CCB-treated wood in slow pyrolysis process. J Hazard Mater. 233–234:172–176. doi:10.1016/j.jhazmat.2012.07.011.
22.
LahrFAR, NogueiraMC, De AraujoVA, VasconcelosJS, ChristoforoAL.2018. Wood utilization of Eucalyptus grandis in structural elements: densities and mechanical properties. Eng Agric. 38:642–647. doi:10.1590/1809-4430-Eng.Agric.v38n5p642-647/2018.
23.
LeeDH, LeeMJ, SonDW, ParkBD.2006. Adhesive performance of woods treated with alternative preservatives. Wood Sci Technol. 40:228–236. doi:10.1007/s00226-005-0036-7.
24.
LimH, TripathiS, TangJD.2020. Bonding performance of adhesive systems for cross-laminated timber treated with micronized copper azole type C (MCA-C). Constr Build Mater. 232:117208. doi:10.1016/j.conbuildmat.2019.117208.
25.
MaghsoodlooS, OzdemirG, JordanV, HuangCH.2004. Strengths and limitations of Taguchi's contributions to quality, manufacturing, and process engineering. J Manuf Syst. 23:73–126. doi:10.1016/S0278-6125(05)00004-X.
26.
Mohd YusofN, Md TahirP, Muhammad RoseleyAS, LeeSH, Abdul HalipJ, Mohammad Suffian JamesR, AshaariZ.2019. Bond integrity of cross laminated timber from Acacia mangium wood as affected by adhesive types, pressing pressures and loading direction. Int J Adhes Adhes. 94:24–28. doi:10.1016/j.ijadhadh.2019.05.010.
27.
ÖzçifçiA, ÖrsY, UysalB.2007. Determination of some physical and mechanical properties of laminated veneer lumber impregnated with boron compounds. J Appl Polym Sci. 105:2218–2224. doi:10.1002/app.26217.
28.
PröllerM.2017. An investigation into the edge gluing of green Eucalyptus grandis lumber using an one-component polyurethane adhesive, e-theses/e-dissertations, Stellenbosch University, Stellenbosch, South Africa, 2017. https://scholar.sun.ac.za.
29.
PundirR, CharyGHVC, DastidarMG.2018. Application of Taguchi method for optimizing the process parameters for the removal of copper and nickel by growing Aspergillus sp. Water Resour Ind. 20:83–92. doi:10.1016/j.wri.2016.05.001.
30.
ŠebenikU, KrajncM.2007. Influence of the soft segment length and content on the synthesis and properties of isocyanate-terminated urethane prepolymers. Int J Adhes Adhes. 27:527–535. doi:10.1016/j.ijadhadh.2006.10.001.
31.
SekiY, SeverK, SarikanatM, HakkI, The influence of oxygen plasma treatment of jute fibers on mechanical properties of jute fiber reinforced thermoplastic composites, in 5th int. Advanced technology symposium. (IATS’09), May 13 - 15, Karabuk, Turkey, 2009.
32.
SikoraKS, McpolinDO, HarteAM.2016. Shear strength and durability testing of Adhesive Bonds in cross-laminated timber. J. Adhes. 92:758–777. doi:10.1080/00218464.2015.1094391.
33.
TameNW, DlugogorskiBZ, KennedyEM.2007. Formation of dioxins and furans during combustion of treated wood. Prog Energy Combust Sci. 33:384–408. doi:10.1016/j.pecs.2007.01.001.
34.
TemizA, AkbasS, AydinI, DemirkirC.2016. The effect of plasma treatment on mechanical properties, surface roughness and durability of plywood treated with copper-based wood preservatives. Wood Sci Technol. 50:179–191. doi:10.1007/s00226-015-0773-1.
35.
TemizA, AlfredsenG, YildizUC, GezerED, KoseG, AkbasS, YildizS.2014. Leaching and decay resistance of alder and pine wood treated with copper based wood preservatives. Cienc y Tecnol. 16:63–76. doi:10.4067/S0718-221X2014005000006.
WangJY, StirlingR, MorrisPI, TaylorA, LloydJ, KirkerG, LebowS, MankowskiME, BarnesHM, MorrellJ.2018. Durability of mass timber structures: a review of the biological risks. Wood Fiber Sci. 50:110–127. doi:10.22382/wfs-2018-045.
40.
WesselsCB, NocettiM, BrunettiM, CraffordPL, PröllerM, DugmoreMK, PagelC, LennerR, NaghizadehZ.2020. Green-glued engineered products from fast growing Eucalyptus trees: a review. Eur J Wood Wood Prod. 78:933–940. doi:10.1007/s00107-020-01553-6.
41.
WinandyJE, MorrellJJ.2017. Improving the utility, performance, and durability of wood- and bio-based composites. Ann For Sci. 74:1–11. doi:10.1007/s13595-017-0625-2.
42.
YusohAS, Md TahirP, Anwar UyupMK, LeeSH, HusainH, KhaidzirMO.2020. Effect of wood species, clamping pressure and glue spread rate on the bonding properties of cross-laminated timber (CLT) manufactured from tropical hardwoods. Constr Build Mater. 273:121721. doi:10.1016/j.conbuildmat.2020.121721.
