Studies on the influence of moisture and specific gravity on the strength properties of mango wood (Mangifera indica)

Influence of moisture and specific gravity on the strength of mango wood is discussed. The co-efficient of correlation between specific gravity and breaking strength was found to be non-significant. The relation of strength and moisture was found to be highly significant. The mean strength values indicated a reduction in strength when the moisture increased from 8.5 to 18.8%. However no appreciable difference in strength values could be observed when moisture increased above 37%. The strength-moisture relationship is a straight line, passing approximately through the fibre saturation point. By using the exponential formula, the breaking strength corresponding to any moisture level between zero and fibre saturation can be determined

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Not AvailableThe work reports the performance of fastenings made of iron, aluminium, galvanised iron, cadmised iron and aluminised iron in contact with Adina cardifolia artocarpus hirsuta, Lagerstroemia lanceolata, Mangifera indica and Tectona grandis as well as timbers treated with arsenic-copper-chromate preservatives. Quantitative corrosion rates of fastenings or special corrosion cylinders driven into wood-fastenings combinations exposed to fine mist of seawater and distilled water in large test chambers are given. The pH values of some common Indian boat building timbers on incubation with seawater, distilled water and the influence of acidity on corrosion of fastenings are reported. The studies have shown that aluminised iron fastenings are compatible with several boat buiding timbers and can be used in place of expensive copper base alloys without sacrificing.Not Availabl

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Not AvailableThe affinity of certain components in creosote towards inorganic salts was explored. Copper oxide on heating with ereosote produces stable compounds which are found to be biologically active. Data regarding preparation of copper creosote, and TBTO-fuel oil mixture are presnted. Data relating to the evaluation of the effectiveness of preservatives by bending modulus test are also presented.Not Availabl