Argamassa de cimento reforçada com fibras de bagaço de cana-de-açucar e sua utilização como material de construção

AUTOR(ES)
DATA DE PUBLICAÇÃO

1996

RESUMO

In this research, "Cement mortar reinforced with sugar cane bagasse fibers and its use as building material", the use of solid waste from sugar alcohol industry as a component to alternative material. The addition of cane bagasse to cement mortar can result in a good building material, provided that problems of chemical incompatibility of fiber and cement are solved and previous methods of tratment of fibers are followed. The sugar cane bagasse fibers, whose pith was removed in the sugar mill, were selected by sieving in order to get the eligible fibers fraction. After washing, these fibers went throught a "mineralization" treatment with inorganic salts (sodium silicate at 5% and aluminium sulfate in saturated solution) to protect fibers from alcaline action. The mineralization also allows imobilization of the organic material and remaining saccharose ( thas acts as a delaying agent in cement setting); the reduction in water absorption and dimensional variation; and the increase of composite quality such as durability and resistance to microorganisms and fire. Diferent mortar composition and fibers amout were tested, being selected the ratio 1 :2:0,20:0,78, (cement; sand: fibers: water, respectivaly) as the one that showed satisfactory resistance and lower apparent density. Panels and cylindrical samples were shaped, mixing components in the following order: cement, sand, water and after homogenization, the fibers were incorporated slowly. The mixture was placed in a mould and handly pressed (at the same time it was adensed on a vibrating table). The samples were cured in humid room and under aspersion. Tests were conducted in laboratory to determine panels and samples physical properties, mechanical resistance and their suitability as thermal and acoustic insulation material, assessment was based on requiriments of the ASTM standart C 208-72.Results related to minimun transversal load and modulus of rupture and deflection obtained by panels were satisfactory considering their use as thermal insulation boards for covering aims, but not as building boards. The panels have showed good caracteristcs in thermal and acoustic insulating. On the other hand, their water abroption has not been satisfatory

ASSUNTO(S)

argamassa cimento portland compostos fibrosos biomassa vegetal placas (engenharia) bagaço de cana

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