Etude Comparative De Deux Composites A Matrice Cimentaire Renforcee Par Des Fibres De Borassus Aethiopum Mart. Et Des Balles De Riz
Year: 2013
Type: article
Abstract: La presente etude s’integre dans une problematique generale de developpement de materiaux de construction innovants a impact environnemental reduit. Elle a experimente deux types de composite cimentaire renforce par de la biomasse vegetale faite de fibres de Borassus aethiopum Mart., et des balles de riz. A cet effet, des etudes de formulation, de compatibilite du ciment avec les biomasses, et de comportement mecanique des gâchees formulees ont ete realisees pour deux compositions granulaires de module de finesse 2,17 et 3. L’etude de compatibilite a revele que les biomasses vegetales bien n’ayant pas subi un traitement prealable sont compatibles avec le ciment CPJ35. La comparaison des caracteristiques physiques et mecaniques des deux composites nous a permis de conclure que le beton de fibres de Borassus aethiopum est meilleur en termes de performances mecaniques. Les valeurs des resistances mecaniques correspondantes aux rapports eau/ciment et ciment/fibres optimums sont comprises respectivement entre 5,5 et 8,37 Mpa pour le composite fibres de Borassus aethiopum -ciment et 3,63 et 12,25 Mpa pour le composite balles de riz-ciment en traction et 6,84 et 16,26 Mpa pour le composite fibres de Borassus aethiopum -ciment et 3,83 et 15,63 Mpa pour le composite balles de riz-ciment en compression. Mots clefs : ciment, biomasse vegetale , Borassus aethiopum, balles de riz, compatibilite, composite. The present study is integrated in general problems of development of building materials innovating with reduced environmental impact. Within this framework we proposed to study two types of cementing composite reinforced by vegetable biomass with knowing fibers of Borassus aethiopum and the rice husk. To this end, studies of formulation, compatibility of cement with the biomass and of mechanical and thermal behavior of the batches formulated were carried out for two granular compositions of fineness 2.17 and 3. The study of compatibility revealed that the vegetable biomass well not having undergone a preliminary treatment are compatible with cement CPJ35. The comparison of the characteristics physical and mechanical of the two composites enabled us to conclude that the fibers concrete of Borassus aethiopum are better in term of mechanical performances. The values of the mechanical resistances corresponding to the optimum reports/ratios water/cement and cement/fibers are included respectively between 5.5 and 8.37 Mpa for the composite fibers of Borassus aethiopum -cement and 3.63 and 12.25 Mpa for the composite rice husk-cement in traction and 6.84 and 16.26 Mpa for the composite fibers of Borassus aethiopum -cement and 3.8 and 15.63 Mpa for the composite rice husk -cement in compression. Keywords : Cement, biomass vegetal, Borassus aethiopum mart, rice husk, compatibility, composite. Article in French
Language: French
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W91088712