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SAVASTANO JUNIOR, H.; AGOPYAN, V.; JOHN, V. M. Low-cost roofing tiles based on vegetable fibre-cement composites. In: CIB SYMPOSIUM ON CONSTRUCTION E ENVIRONMENT: THEORY INTO PRACTICE, 2000, São Paulo. Anais… São Paulo, 2000.
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Número de Trabalhos: 23 (Nenhum com arquivo PDF disponível)
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Dados do autor na base InfoHab:
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Citações: 8
Índice h: 2  
Co-autores: 2

Abstract

The main objective was the evaluation of roofing tiles produced by a low-energy consumption method. Brazilian fibrous wastes from sisal and coir crops and also from eucalyptus pulp mill were chosen for mortar reinforcement. The binder was prepared with ground iron granulated blast-furnace slag (BFS) originated as by-product from pig-iron manufacture and activated by a mixture of gypsum and hydrated lime. The component preparation followed conventional dough mixing method, ordinary vibration and wet chamber curing for the seven initial days. Three point bending test presented maximum load up to 587 N for the reinforced tile, in wet condition, after a total age of 28 days. As should be expected absorbed energy during cracking showed the main advantage of fibre utilisation: BFS mortar-eucalyptus fibre composite ductility was 40% higher than that associated with the reference plain matrix. Water absorption and permeability were in conformity to international requirements. Microstructure analyses based on backscattering electron image and energy dispersive spectroscopy (EDS) presented additional information about fibre-matrix transition zone and its correlation with composites macrostructure behaviour. Finally the effect of natural ageing under tropical environmental condition during 16 months is discussed regarding to main physical and mechanical properties.
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