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Effects of temperature and moisture content on selected wood mechanical properties involved in the chipping process

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Abstract

The effects of temperature and moisture content on selected mechanical properties associated with the chipping process were evaluated. In chipping, mechanical properties such as shear parallel to the grain, cleavage, and bending are involved. Matched samples of heartwood and sapwood were obtained from freshly harvested logs of black spruce and balsam fir to determine the variation of the studied mechanical properties between −30 and 20 °C, at intervals of 10 °C. Moisture content (MC), basic density (BD), and annual ring width (RW) were measured for each sample. For both wood species, temperature had a significant effect on all mechanical properties under freezing conditions (below 0 °C). This effect was more important for sapwood than for heartwood, which was explained by the difference in MC between these two types of wood. Between 0 and 20 °C, temperature and type of wood did not show any significant effect on the mechanical properties. Multiple regression models were obtained to predict the mechanical properties. These regressions showed that MC was the most important factor to explain the mechanical properties below 0 °C. However, for temperatures of 0 °C and higher, BD was the principal factor to predict the mechanical properties. RW was not a significant factor to predict any mechanical property. Cleavage was the most sensitive one to changes in temperature followed by shear, modulus of rupture, and modulus of elasticity. These results could be of great importance in the chipping process.

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References

  • American Society for Testing and Materials (ASTM) (1997) ASTM D 143-94 Standard methods of testing small, clear specimens of timber. Philadelphia, PA

  • Bodig J, Jayne B (1982) Mechanics of wood and wood composites. Van Nostrand Reinhold, New York

    Google Scholar 

  • Christie RD (1986) Chip thickness and its effect on pulping needs further study. Pulp Pap Can 87(3):37–38, 41, 43

  • Christie RD (1987) Chip screening for pulping uniformity. Tappi J 70(4):113–117

    CAS  Google Scholar 

  • Comact (2014) http://www.comact.com/. Accessed 22 July 2014

  • Deomano EC, Zink-Sharp A (2004) Bending properties of wood flakes of three southern species. Wood Fiber Sci 36(4):493–499

    CAS  Google Scholar 

  • Forest Products Laboratory (FPL) (1999) Wood handbook - wood as an engineering material. General technical report FPL–GTR–113. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison

  • Fuller, WS (1983) Chipping, screening and cleaning. Pulp and paper manufacture, vol 1. Properties of fibrous raw materials their preparation for pulping. M.J Kockrek and C.F.B. Sterens, Tappi. ISBN:0‐919893‐07‐4

  • Gerhards CC (1982) Effect of the moisture content and temperature on the mechanical properties of wood: an analysis of immediate effects. Wood Fiber 14(1):4–36

    Google Scholar 

  • Green DW, Evans JW (2008) The immediate effect of temperature on the modulus of elasticity of green and dry lumber. Wood Fiber Sci 40(3):374–383

    CAS  Google Scholar 

  • Green DW, Evans JW, Logan JD, Nelson WJ (1999) Adjusting modulus of elasticity of lumber for changes in temperature. For Prod J 49(10):82–94

    Google Scholar 

  • Hatton JV (1975) WFPL chip quality analytical procedure: effect of chipper, wood species and season on production of pin chips and fines. Pulp Pap Can 76(8):64–70

    Google Scholar 

  • Hellström LM, Gradin PA, Carlberg T (2008) A method for experimental investigation of the wood chipping process. Nord Pulp Pap Res J 23(3):339–342

    Article  Google Scholar 

  • Hellström LM, Isaksson P, Gradin PA, Eriksson K (2009) An analytical and numerical study of some aspects of the wood chipping process. Nordic Pulp Pap Res J 24(2):225–230

    Article  Google Scholar 

  • Hernández RE, Almeida G (2003) Effects of wood density and interlocked grain on the shear strength of three Amazonian tropical hardwoods. Wood Fiber Sci 35(2):154–166

    Google Scholar 

  • Hernández RE, Boulanger J (1997) Effect of the rotation speed on the size distribution of black spruce pulp chips produced by a chipper-canter. For Prod J 47(4):43–49

    Google Scholar 

  • Hernández RE, Lessard J (1997) Effect of cutting width and cutting height on the size distribution of black spruce pulp chips produced by a chipper-canter. For Prod J 47(3):89–95

    Google Scholar 

  • Hernández RE, Quirion B (1993) Effect of chipper-canter knife clamp on the quality of chips produced from black spruce. For Prod J 43(9):8–14

    Google Scholar 

  • Hernández RE, Quirion B (1995) Effect of knife clamp, log diameter, and species on the size distribution of pulp chips produced by a chipper-canter. For Prod J 45(7/8):83–90

    Google Scholar 

  • Hoekstra PL, Veal MA, Lee PF, Sinkey JD (1983) The effects of chip size on mechanical pulp properties and energy consumption. Tappi J 69(9):119–122

    Google Scholar 

  • Jessome AP (1977) Résistance et propriétés connexes des bois indigènes au Canada (Strength and related properties of woods grown in Canada) (Publication SP-514F). Forintek Canada Corp, Sainte-Foy

    Google Scholar 

  • Koran Z (1979) Tensile properties of spruce under different conditions. Wood Fiber 11(1):38–49

    CAS  Google Scholar 

  • Koubaa A, Zhang SY, Isabel N, Beaulieu J, Bousquet J (2000) Phenotypic correlations between juvenile-mature wood density and growth in black spruce. Wood Fiber Sci 32(1):61–67

    CAS  Google Scholar 

  • Koubaa A, Zhang SY, Isabel N, Beaulieu J, Bousquet J (2005) Transition from juvenile to mature wood in black spruce (Picea mariana (Mill) B.S.P.). Wood Fiber Sci 37(3):445–455

    CAS  Google Scholar 

  • Laganière B, Bédard N (2009) Debarking enhancement of frozen logs. Part I: effect of temperature on bark/wood bond strength of balsam fir and black spruce logs. For Prod J 59(6):19–24

    Google Scholar 

  • Lunstrum SJ (1985) Balanced saw performance. U.S. Department of Agriculture, Forest Service, Forest Products Utilization, Technical Report No. 12

  • McLauchlan TA, Lapointe JA (1979) Production of chips by disc chippers. Joint Textbook Committee of the Paper Industry (TAPPI), Chip quality monograph, pp 15–32

  • Michel B (1978) Ice mechanics. Les Presses de l’Université Laval, Quebec City

    Google Scholar 

  • Mishiro A (1990) Effect of freezing treatments on the bending properties of wood. Bull Tokyo Univ 82:77–189

    Google Scholar 

  • Mishiro A, Asano I (1984) Mechanical properties of wood at low temperatures. Effect of moisture content and temperature on the bending properties of wood. II. Moisture content beyond the fiber-saturation point. Mokuzai Gakkaishi 30(4):277–286

    Google Scholar 

  • Olson D, Hatton JV, Hunt K (1980) Effect of chip thickness in kraft-anthraquinone pulping of trembling aspen. Tappi J 63(2):109–110

    CAS  Google Scholar 

  • Onwona-Agyeman S, Morioka N, Kondo M, Kitagawa K (1995) Seasonal changes in the modulus of elasticity of living branches of three coniferous species. Ecol Res 10(2):199–206

    Article  Google Scholar 

  • Panshin AJ, de Zeeuw C (1980) Textbook of wood technology. Michigan State University, New York

    Google Scholar 

  • Parent B (2013) Quebec’s forest resources and industry. A statistical report, 2013 Edition Ministère des Ressources naturelles, Gouvernement du Québec, Québec

  • Robertsén L, Lönnberg B (1986) Significance of chip thickness in CRMP and RMP Part 2 A laboratory study with pine chips. Pap Puu 68(12):932–940

    Google Scholar 

  • SAS Institute (2007) SAS/Stat User’s Guide, release 9.2 edn. SAS Institute Inc, Cary

  • Sawquip Sawmill Equipment (2014) http://www.sawquip.com/en/. Accessed 22 July 2014

  • Siimes FE (1967) The effect of specific gravity, moisture content, temperature and heating time on the tension and compression strength and elastic properties perpendicular to the grain of Finnish pine, spruce and birch wood and the significance of those factors on the checking of timber at kiln drying. Publication 84, The State Institute for Technical Research, Helsinki

  • Tikka P, Tähkänen H, Kovasin K (1993) Chip thickness vs. kraft pulping performance: experiments by multiple hanging baskets in batch digesters. Tappi J 76(3):131–136

    CAS  Google Scholar 

  • Uhmeier A (1995) Some fundamental aspects of wood chipping. Tappi J 78(10):79–86

    Google Scholar 

  • Wangaard FF (1950) The mechanical properties of wood. Wiley, New York

    Google Scholar 

  • Zhang SY (1995) Effect of growth rate on wood specific gravity and selected mechanical properties in individual species from distinct wood categories. Wood Sci Technol 32(3):197–204

    Google Scholar 

Download references

Acknowledgments

This research was supported by the Fonds Quebecois de la Recherche sur la Nature et les Technologies (FQRNT) and by FPInnovations.

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Authors and Affiliations

  1. Centre de recherche sur les matériaux renouvelables, Département des sciences du bois et de la forêt, Université Laval, 2425, rue de la Terrasse, Quebec, QC, G1V 0A6, Canada

    Roger E. Hernández & Leandro Passarini

  2. Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, 445 boul. de l’Université, Rouyn-Noranda, QC, J9X 5E4, Canada

    Ahmed Koubaa

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  1. Roger E. Hernández
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  2. Leandro Passarini
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  3. Ahmed Koubaa
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Correspondence to Roger E. Hernández.

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Hernández, R.E., Passarini, L. & Koubaa, A. Effects of temperature and moisture content on selected wood mechanical properties involved in the chipping process. Wood Sci Technol 48, 1281–1301 (2014). https://doi.org/10.1007/s00226-014-0673-9

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  • DOI: https://doi.org/10.1007/s00226-014-0673-9

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