QUALITY OF SAWN TIMBER DRYING OF Eucalyptus dunnii

Authors

  • Elias Taylor Durgante Severo UFSM

DOI:

https://doi.org/10.5902/19805098399

Keywords:

Eucaliptus dunnii, presteaming, conventional drying.

Abstract

In the present study, the behaviour of Eucalyptus dunnii wood drying in a conventional pilot kiln was evaluated, using three drying schedules. Each drying schedule had an initial vaporization (presteaming) of 3 hours after one hour of initial warming and an intermediate vaporization of 5 hours for the collapse recovery when the wood was at 17% of humidity. The results show that among the used drying schedule only the schedule regarded as the mildest presented a good result in terms of dry wood quality. Among the discovered defects, there were 37,5% of collapse, 35% of cupping and 10% of split. Hoviever, though from this total only 15% of the collapse and cupping were regarded as strong defects.

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References

ALEXION, P.N.; WILKINS, A. P.; HARTLEY, J. Effect of presteaming on drying rate. Wood anatomy and shrinkage of regrowth Eucalyptus pilularis Sm. Wood Sci. Technology, New York, v.24, p103-110, 1990.

BLUHM, E.; KAUMAN, W.G. El colapso en la madera y su reacondicionamento. Informe Técnico, Santiago, Chile, n.22, p.1-23, 1965.

BRENNAN, L. J.; FRICKE, K. W.; KAUMAN, W. G. et al. Pre-drying in Australia. The Australian Timber J., p.360-369, Dec. 1966. Congress Issue.

CAMPBELL, G. S. The value of preateaming for drying some collpse-suceptible Eucalypts. For. Prod. J. , v.11, n.8, p.334-337, 1961.

CAMPBELL, G.S.; HARTLEY, J. Drying and dried wood. In: Hillis, W.E. and Brown, A.G. Eucalypts for Wood Production: Australia: CSIRO, 1978. cap. 16.

CECH, M. Y.; PFAFF, F. Kiln operators manual of Eastern Canada. Ontario: Eastern For. Prod. Lab, 1977. 189 p.

CHAFE, S. C. Effect of brief presteaming on shrinkage, collapse and other wood-water relationships in Eucalyptus regnans F. Muell. Wood Sci. Technol., New York, v.24, p.311-326, 1990.

CHRISTENSEN, F.J. High temperature drying of hardwoods increases kiln throughput. For. Products Newsletters, n. 2, Out., 1985. New Series.

CHRISTENSEN, F.J. Recent research on the hight tenperature drying of sawn Eucalyptus delegatensis below fibre saturation point. In: For. Prod. Res. Conf., 21., 1984, Clayton, Proc ... Clayton, 1984.

CUPPETT, D. G.; GRAFT. Kiln-drying of pre-surfaced 4/4 appalachion OAK. For. Prod. J., v.22, n.6, p.36-41, 1972.

ELLWOOD, E. L.; ECKLUND, B. A. Treatments to improve wood permeability as an approach to the drying problems. Proc. Western Dry Kiln Clubs, 13., 1961, Medford, Oreg. Annual Meeting ... Medford, 1961.

ELLWOOD, R.W.; ERICKSON. Effect of presteaming on seasoning stain and drying rate of redwood. For. Prod. J., Madison, v.12, n.7, p.328-32, 1962.

HARTLEY, J.; GOUGH, D.K. Future sawnood drying in Australia. FDC, v. 181, n. 94, p.179-190, 1990.

HASLETT, A.N.; KININMOMTH, J.A. Pretreatments to hasten the drying of Nothofagus fusca. New Zealand J. For. Sci., v.16, n.2, p.237-246, 1986.

HILDEBRAND, R. Kiln drying of saw timber. Germany, R.H.: Maschinenbau Gmbh, 1970. 202p.

KAUMAN, W. G. Cell colapso in wood. South Melbourne: CSIRO, Division of Forest Produts, 1964. 63p. (Reprint n.566).

KAUMAN, W. G. Effect of thermal degradation on shrinkage and collapse of wood from 3 Australian species. For. Prod. J., v.11, p.445-452, 1961.

KININMONTH, J.A. Effect of steaming on the fine structure of Nothofagus fusca. New Zealand J. For. Sci., v.1, p.129-139, 1971.

KOLLMANN, F.F.P.; COTÉ, W.A. Principles of wood science and technology solid wood. New York: Springer, 1968. v.1.

LIANG, S.Z. The variability of swelling and shrinkage of vermillion wood and the techinique of high-temperature drying . J. Nanjing Technol. Col. For. Prod. v.1, p. 1-15, 1981.

MACKAY, J.F.G. Influence of steaming on water vapor diffusion in hardwoods, Wood Sci., v.3, p.156-160, 1971.

MACKAY, J.F.G. Recovery of collapse in E. delegatensis by use of anhydrous Ammonia and steam. Wood and Fiber, Lawrence, Kans., v.4, n.3, p.126-129, 1972.

MENDES, A . M.; SEVERO, E. T. D. Estudo comparativo entre três técnicas de secagem natural conduzido na região de Manaus com madeira de Hura Creptans. Manuais: CNPQ/CPPF/INPA, 1984. (Boletim informativo, 4).

NEUMAN, R. Kiln drying young Eucalyptus globulus boards from green. In: WOOD DRYING SIMPOSIUM, 1989, Seattle. IUFRO, 1989. p. 107-115.

NEUMAN, R. J.; SAAVEDRA, A. Check formation during the drying of Eucalyptus globulus. Holz als roh-und werkstoff, v.50, p.106-110, 1992.

PRATT, G.H. Timber drying manual. London: Department of the Environment, 1986. 122p.

RICE, W. W. Pre-surfacing lumber before drying. Proc. F.P.R.S. Drying lumber of quality and profit, Charlotte, N.C., p.15-17, Oct. 1986.

RIETZ, R. C.; JENSON, J. A. Producing check-free beech for turnings. For. Prod. J., v.18, n.11, p.42-44, 1968.

ROZAS, E. M. Contribuicão ao desenvolvimento tecnologico para utilização de madeira serrada de Eucalyptus grandis (Hill Ex Maiden) na deração de produtos com maior valor agregado. Curitiba: UFPR, 1993.133p. Dissertação (Mestrado em Engenharia Florestal) – Universidade Federal do Paraná, 1993.

ROZAS, E., M.; TOMASELLI, I. Secagem de madeira serrada de Eucalyptus viminalis. Ciência Florestal, v. 3, n.1, Santa Maria: CEPEF, p.147-159, 1993.

SANTINI, E. J.; TOMASELLI, I. Colapso na madeira de algumas experiências brasileiras. Série Técnica, Curitiba, n.3, p. 1-21, 1980.

SIMPSON, W. T. Dry kiln operator’s manual. Agric. Handb., Madison, n.188, p.1-274, 1991.

SIMPSON, W. T. Drying wood: a review. Part II. Drying Technol., v. 2, n. 3, p.353-368, 1983/4.

SIMPSON, W. T. Effect of presteaming on moisture gradient of Northern Red Oak during drying. Wood Sci., Madison, v.8, p.156-159, 1976.

STÖHR, H.P.; MACKAY, D. Drying schedule evaluation of 25 mm Eucalyptus grandis. Pretoria: National. Timber Research Institute, 1983. 34p. (Hout/320).

TOMASELLI, I. Secagem a alta temperatura um processo aplicável as condiçòes brasileiras. In: SEMINÁRIO DE UTILIZAÇÃO DE MADEIRAS TROPICAIS DE POVOAMENTOS NATURAIS E ARTIFICIAIS NA INDUSTRIA MADEREIRA MODERNA, 1978, Curitiba. Seminário ... Curitiba: FUPEF, 1978. p. 62-70.

VERMAAS, H. F. Drying eucalypts for quality: Material characteristics, pre-drying treatments, drying, methods, schedules and optimization of drying quality. In: SEMINÁRIO INTERNACIONAL DE UTILIZAÇÃO DA MADEIRA DE EUCALIPTO PARA SERRARIA, 1995, São Paulo. Anais... Piracicaba: IPEF, IPT, 1995, p.119-132.

VERMAAS, H. F. Case for the low temperature kiln drying of eucalyptus grandis. South African For. J., Pretoria, n. 140, p. 72-77, 1987.

WALKER, J. C. F. The drying of timber. In: WALKER, J.C.F. et al. Primary wood processing: principles and practice. London: Chapman & Hall, 1993. p.247-284.

Published

2000-03-30

How to Cite

Severo, E. T. D. (2000). QUALITY OF SAWN TIMBER DRYING OF Eucalyptus dunnii. Ciência Florestal, 10(1), 109–124. https://doi.org/10.5902/19805098399

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