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Vimal Kothiyal , Y. S. Negi , K. K. Uniyal , P. S. Panwar

Abstract

Physical and Mechanical properties of plantation grown Leucaena leucocephala obtained from Andhra Pradesh and F.R.I. Dehra Dun have been evaluated on the basis of tests done on small clear specimens in green and dry conditions. Suitability indices and Safe working stresses have also been calculated. It's grouping according to strength and classification for different end uses from strength point of view have also been done as per existing criteria. On the basis of strength, the timber is found suitable for structural use, door and window shutters /frames, furniture and cabinet making, flooring, tool handles, packing cases, dunnage pallets and expendable pallets etc.

Keywords

Leucaena leucocephala (Subabul), Plantation-grown, Physical And Mechanical
Properties, Andhra Pradesh, Dehra Dun

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P. K. Pande , Sanjay Naithani , Vimal Kothiyal , S. S. Mohanta , Neena Juyal , Rajnesh Rawat

Abstract

Within and among tree variations in physico-chemical and anatomical properties of seed raised plantation wood of Leucaena leucocephala have been investigated. Within tree variation in specific gravity, fibre length and fibre length/diameter ratio were significant due to height. The variation in anatomical properties and ratios in radial direction were non-significant. Within tree variation were significant between bole and twigs. Inter-tree variations for wood anatomical properties were also significant and accounted for genetic variability in trees for wood traits. Site quality also affected anatomical properties and pulping and paper quality ratios significantly. Lignin content (%) significantly varied with reference to height and also shown significant inter-tree variation. Lignin content (%) was significantly positively correlated with fibre wall thickness. Extractives had shown non-significant intra and inter-tree variations. Most of the anatomical characters shown significant positive correlation to each other. Vessel member dimensions shown significant negative correlation with specific gravity.

Keywords

Leucaena leucocephala, Physico-chemical Properties, Intra- and Inter-tree Variation

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Vimal Kothiyal , A. K Khanduri , V. K. Jain

Abstract

Strength properties of 12 clones of 10' years old Populus deltoides from single trees obtained from Haldwani (Uttaranchal), India are reported. The preliminary results on strength properties for screening the clones for timber indicated that at Haldwani, clone number 290/84 has the highest specific gravity and strength properties. Clone number 75/84 has the lowest values among all the 12 clones tested.

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B. S. Kamala , Vimal Kothiyal , S. K. Sharma

Abstract

Physical and mechanical properties of Grevillea robusta procured from Institute of Wood Science and Technology campus, Bangalore were evaluated. Hardness and nail holding power are maximum in basal portion. Variation are found significant with height for sp.gr.,FS at LP and MCS in green condition. Based on the strength properties, the timber is classified as moderately heavy, moderately strong, not tough, moderately steady and soft. The timber is classified as group III constructional timber. It may be used for door shutters and frames, joinery, furniture, decorative veneers, turnery and packing cases.

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Vimal Kothiyal , B. S. Kamala

Abstract

Coconut wood from non-productive plantations is a by-product of an agricultural crop and constitutes a renewable resource which may serve as a complement to, or at least in part. As a substitute for traditional timbers in local markets. It more extensive utilisation is expected to contribute to the conservation of natural forests. On evaluating its physical and mechanical properties, the wood having density more than 0.5 is classified as tough, very hard, very strong and very heavy timber. Based on suitability indices it is found suitable for tool handles (Group I), wood poles (Group II), construction (Group II) specially for roofingand load bearing components and door, window, shutters and frames.

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V. S. Kishan Kumar , Sachin Gupta , Vimal Kothiyal

Abstract

Effectiveness of finger jointing was assessed in utilising lower quality mango wood which is extensively used by handicrafts industries in India. The study was based on the estimation of Modulus of elasticity (MOE) and Modulus of Rupture (MOR) under static bending of finger jointed sections and comparing them with the values measured for clear wood sections from the same lot. It was found that the MOE of the sections joined by Urea Formaldehyde adhesive showed significantly better values than that of even unjointed sections. The MOR values of such jointed sections were similar to those of unjointed clear wood sections. Sections jointed through Polyvinyl Acetate adhesive exhibited lower MOR and MOE values.

Keywords

Finger Jointed, Mango Wood, Modulus of Rupture, Modulus of Elasticity

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