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American University in Cairo (2020)

Improving the strength performance and economic viability of Eucalyptus Camaldulensis through finger jointing

Amal, Hany

Titre : Improving the strength performance and economic viability of Eucalyptus Camaldulensis through finger jointing

Auteur : Amal, Hany

Université de soutenance : American University in Cairo

Grade : Masters of Science in Construction Engineering 2020

Résumé partiel
Egypt is known with its arid weather and the presence of a very limited space of greenery mainly around the Nile River and mostly for agriculture uses. Therefore Egypt has always lacked the presence of forestry due to the scarcity of water supply which ha 2020 s led to a historical low production of local wood. Therefore, Egypt sustains the domestic needs of wood through imports from several regions of the world ; mainly, Europe, North American, and Asia .Nevertheless, Egypt has abundance of homegrown trees that grow with low water consumption often irrigated through the use of waste water that are grown informally . Eucalyptus Camaldulensis is one of the widely grown trees in Egypt and are present in huge numbers ; however they are not vastly used in the Egyptian market for construction applications as a competitor to the imported wood types ; however they are mainly being used as wood fuel. In fact, as previous studies show Eucalyptus Camaldulensis has high mechanical properties and relatively cheap prices that allow it to compete with imported wood types like pine or oak. However due to the informality and the limited studies on the wood, it is not gaining the presence it can achieve in the construction market. The mechanical properties of eucalyptus Camalednis enable it to be used in vast uses as in outdoor and indoor applications in flooring, furniture and more. The main objective of this research is to develop finger joints that enhance the properties of the wood and solve the problem of abundance of defects in the wood and small production sizes. Finger joints can mitigate the problem by omitting the defected part and connecting the wood in a very strong way that can enable it to be used in vast uses Next step was to determine the standard test methods, procedures, required types of equipment’s and apparatus according to standards. To evaluate different finger joints, glue types, humidity cycle, and joints accuracy. These factors are then all tested so that the best configuration can be chosen to maximize the gains of finger joints, and enhance the quality of eucalyptus Camaldulensis wood. It was then concluded after analyzing tests results that finger length of 12mm had a significant effect on increasing the flexural strength of the wood. Moreover, the glue type of MUF had a superior quality when compared to polyvinyl acetate which had a significant effect in increasing the strength of the wood.

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Page publiée le 3 janvier 2021