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| Author(s): |
Maria Fátima do Nascimento
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) |
| Defense date: | 2003-03-28 |
| Examining board members: |
Francisco Antonio Rocco Lahr;
Antonio Ludovico Beraldo;
Marcos Tadeu Tiburcio Goncalves;
Marta Cristina de Jesus Albuquerque Nogueira;
Antonio Carlos de Oliveira
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| Advisor: | Francisco Antonio Rocco Lahr |
| Abstract | |
In the development of this work, concepts were analyzed and proposed seeking to evidence the possibility of technological changes for the socio-economic growth of the Brazilian northeast region. It still hovers a pré-established concept about Brazilian northeast: it is treated as an area without possibility of providing its own needs. It is necessary to revert this situation with the improvement of its life conditions through the execution of the ideas as the related to the reforestation and to the maintainable development. The present proposal has as focus the use of northeast wood species, embracing the ones that resist prolonged drought of the area. Procedures are suggested to the production of particleboard with the species: Angico (Anadenanthera macrocarpa), Algaroba (Prosopis juliflora) and Juremapreta (Mimosa tenuiflora), all frequent in the northeast area of Brazil. The results of the physical and mechanical properties are also presented: density, thickness swelling, absorption, artificial weathering, natural weathering, tension parallel to surface, tension perpendicular to surface, modulus of rupture, proportionality limit and modulus of elasticity in the static bending, and nail-head withdrawal test. The rehearsals were accomplished according to the recommendations of the normative document: 1037/1996, ASTM. The results were compared with the properties of the usually marketed boards, and high satisfactory values were obtained. (AU) | |