Development of Drying Schedule of Superior and Conventional Teak Wood of Ten Years-old Planted in Blora, Central Java

https://doi.org/10.22146/jik.12633

Tomy Listyanto(1*), Yusuf Setia Darmawan(2), Rini Pujiarti(3), Fanny Hidayati(4), Ganis Lukmandaru(5), Joko Sulistyo(6)

(1) Department of Forest Product Technology, Faculty of Forestry, Gadjah Mada University Jl. Agro No. 1 Bulaksumur, Sleman 55281
(2) Department of Forest Product Technology, Faculty of Forestry, Gadjah Mada University Jl. Agro No. 1 Bulaksumur, Sleman 55281
(3) Department of Forest Product Technology, Faculty of Forestry, Gadjah Mada University Jl. Agro No. 1 Bulaksumur, Sleman 55281
(4) Department of Forest Product Technology, Faculty of Forestry, Gadjah Mada University Jl. Agro No. 1 Bulaksumur, Sleman 55281
(5) Department of Forest Product Technology, Faculty of Forestry, Gadjah Mada University Jl. Agro No. 1 Bulaksumur, Sleman 55281
(6) Department of Forest Product Technology, Faculty of Forestry, Gadjah Mada University Jl. Agro No. 1 Bulaksumur, Sleman 55281
(*) Corresponding Author

Abstract


The aims of this study were to investigate drying defect characteristics, to develop proper drying schedule, and to analyze the relationship between the developed drying schedule and its wood properties. This study used superior and conventional teak wood of ten years-old planted in Blora, Central Java. Sample from different axial positions (bottom and middle part) and different board thicknesses (20 mm and 40 mm) were taken. Drying schedule was developed in accordance to Terazawa method, which dried the sample for 72 h at a temperature of 100 °C. Initial moisture content, crack, collapse, and honeycombing were observed to determine the proper drying schedule. The developed drying schedule then was related to their characteristics, such origin of the seedling, thickness, density, and heartwood percentage. The proper scheduled was also applied in larger sample and evaluated. The results showed that there were five variations of drying schedule for superior and conventional teak wood. Chi square analysis indicated that the board thickness affect significantly on developing drying schedules. Boards with a thickness of 20 mm can be dried with an initial temperature of 70 °C, the wet bulb depression 7°C, and the final temperature of 105°C. Further, boards with a thickness of 40 mm should be dried with a softer drying schedule with an initial temperature of 60°C, wet bulb depression temperature of 4 °C, and the final temperature of 85°C. Application of the selected drying schedule was succeed without any significant defects.

Keywords: superior; teak; drying schedules; inferior; wood

 

Pengembangan Skedul Pengeringan Kayu Jati "Mega" dan Konvensional Umur 10 tahun Ditanam di Blora, Jawa tengah

Abstract

Tujuan dari penelitian ini adalah mengetahui karakteristik cacat pengeringan, skedul pengeringan yang sesuai, variasi ketebalan papan serta beberapa sifat kayunya terhadap skedul pengeringan. Penelitian ini menggunakan kayu jati prospektif unggul dan konvensional umur 10 tahun dari Blora, Jawa Tengah dengan letak aksial yang berbeda (pangkal dan tengah) serta ketebalan papan masing-masing 20 mm dan 40 mm. Penyusunan skedul pengeringan menurut metode Terazawa, dengan pengeringan selama 72 jam pada suhu 100°C. Parameter yang diamati yaitu kadar air awal, cacat retak, kolaps, dan honeycombing. Cacat yang terjadi digunakan untuk penyusunan skedul pengeringan. Skedul pengeringan selanjutnya diuji hubungannya dengan sumber asal bibit, ketebalan, berat jenis, dan persen kayu terasnya. Skedul pengeringan yang paling sesuai selanjutnya diujicoba dan dievaluasi. Berdasarkan hasil penelitian, diajukan lima skedul pengeringan. Hasil analisis chi square menunjukkan bahwa ketebalan papan memiliki hubungan signifikan terhadap variasi skedul pengeringan. Papan dengan ketebalan 2 cm dapat dikeringkan dengan suhu awal 70°C, depresiasi bola basah 7°C, dan suhu akhir 105°C. Selanjutnya, papan dengan ketebalan 4 cm perlu dikeringkan dengan skedul yang lebih lunak dengan suhu awal 60°C, depresiasi suhu bola basah 4°C, dan suhu akhir 85°C. Hasil uji aplikasi menunjukkan hasil yang memuaskan dengan cacat yang tidak signifikan.

 


Keywords


unggul; jati; skedul pengeringan; inferior; kayu

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References

  1. Ahmed SA & Chun SK. 2011. Permeability of Tectona grandis L.f as affected by wood structure. Wood Science and Technology 45, 487-500.
  2. Boone RS, Kozlik CJ, Bois PJ, & Wengert EM. 1988. Dry Kiln Schedules for Commercial Woods: Temperate and Tropical Forest Products Laboratory. United States Department of Agriculture, Madison, Wiconsin.
  3. Bristish Standard Institute. 1957. British Standard (BS) 373:1957: Methods of Testing Small Clear Specimens of Timber. British Standard Institution, London. 22.
  4. Durand PY. 1985. Contribution to the study of determination tables of drying-physical properties of wood. Tropical Timber and Forest 207, 63-78.
  5. Hidayati F, Ishiguri F, Iizuka K, Makino K, Marsoem NS, Yokota S. 2014. Among-clone variations of anatomical characteristics and wood properties in Tectona grandis planted in Indonesia. Wood and Fiber Science 46, 385-393.
  6. Keey RB, Langrish TAG, & Walker JCF. 2000. The Kiln Drying of Lumber. Springer, Berlin. Ilic J & Hillis WE. 1986. Prediction of collapse in dried eucalypts wood. Holzforschung 40,109-112.
  7. Jankowsky IP. 1992. A screening to select kiln schedules. Piracicaba 2, 20-24.
  8. Listyanto T & Nichols JD. 2009. A review of relationships between wood quality and silvicultural practices. Jurnal Ilmu Kehutanan 3(2), 116-126.
  9. Listyanto T, Glencross KS, Nichols JD, Schoer L & Harwood C. 2010a. Performance of eight eucalypt species and interspecific hybrid combinations at three sites in northern New South Wales, Australia. Australian Forestry 73(1), 47-52.
  10. Listyanto T, Lukmandaru G, Pramadya C, Siswanto D, & Hattori N. 2010b. Relationship between wood properties and developed drying schedule of inferior teak (Tectona grandis L.f) and mahogany (Swietenia macrophylla King). Wood Research Journal 1, 83-88.
  11. Maeglin R. 1987. Juvenile wood, tension wood, and growth stress effects on processing hardwood. In: Proceedings of the 15th Annual Hardwood Symposium of the Hardwood Research Council. Memphis, TN.
  12. Mujumdar A S. 2014. Handbook of Industrial Drying. 4th Edition. CRC Press, Boca Raton. Na`iem M. 2000. Early performance of clonal test of teak in. In:Proceeding of 3rd Regional Seminar on Teak. Potentials and Opportunities in Marketing and Trade of Plantation Teak: Challenge for the Millenium. Yogyakarta. 271-275.
  13. Pandey D & Brown C. 2000. Teak: A global review. Unasylva 51(201), 3-13.
  14. Simpson WT. 1991. Dry Kiln Operator’s Manual. United States Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, Wisconsin. 274.
  15. Simpson WT. 1992. Drying technology issues in tropical countries. Proceeding of Forest Product International Union of Forestry Research Organizations. IUFRO, Nancy, France. 497-507 .
  16. Simpson WT. 1996. Method to estimate dry-kiln schedules and species groupings; Tropical and temperate hardwoods. Forest Products Laboratory, USDA. 57.
  17. Siswamartana S. 2005 Ups and downs of teak forest management in Indonesia. In: Proceeding of the International Conference on Quality Timber Products of Teak From Sustainable Forest Management. Peechi, India. 63-67.
  18. Taghiyari HR, Habibbzade S, & Tari SMM. 2014. Effects of wood drying schedules on fluid flow in Paulownia wood. Drying Technology 32(1), 89-95.
  19. Terazawa S. 1965. Methods for easy determination of kiln drying schedules of wood. Japan Wood Industry 20(5), 216-226. (In Japanese).
  20. Terazawa S, Kobayashi T, & Hadi YS. 1984. Drying characteristics of Sulawesi woods. Bulletin of the Nagoya University Forests 8, 151-167.
  21. Vermaas HF. 1983. Synopsis of wood drying working party session. Proceeding of IUFRO Division 5 Conference: Wood Drying Party. Madison. 5-6.
  22. Zhang Y, Oliveira L, & Avramidis S. 1996. Drying characteristics of hem-fir square as affected by species and basic density presorting. Forest Products Journal 46(2), 44-50.



DOI: https://doi.org/10.22146/jik.12633

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