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ABSTRACT
The growing concern with the environmental and social issues has intensified in the last
decades, as well as actions which are directed for to sustainable society growth all over the
world. The sector of the civil construction, wich uses great amount of natural resources for the
production of materials and products, has intensified researches searching for the use of
residues and industrial by-products in their activities. Following this tendency, the use of
residues of the production sawed Pinus spp wood was investigated as lignocellulosic agreggate,
in substitution
of fine agreggate mineral, origined from nonrenewable sources, for the production
of wood-cement composites are used as base for the production of concrete blocks for structural
masonry. The possibility of partial substitution of the Portland cement of the composite for six
alternative materials: silica fume, metakaolin, fly-ash, blast slag furnace, residue of calcined
ceramic and rice husk ash of residual origin, was also investigated. The tenors of substituition to
the Portland cement varied from 5% to 20%, in the case of the silica fume; 25% to 60%, in the
case of the blast slag furnace and from 5% to 40%, in the case of the other cimenticios
alternative materials. The determination of the compatibility among the Portland cement and the
residue of Pinus spp was made by termimetrics techniques wich used by Bragg sensor’s in
optic fibres, and also the physical and mechanical characterization of the composites and
produced blocks, in agreement with the ABNT normalization. The thermal condutance of the
produced material was determined by heat flux measurement. Success was obtained in the
production of blocks prototypes with nine different mixtures, with substitutions of 50% in volume,
of the fine aggregate mineral for residue of Pinus spp and with substituitions of the Portland
cement for 5% of fly-ash and residue of calcined ceramic, 10% of silica fume and metakaolin,
25% of blast slag furnace and 30% of rice husk ash, evidencing the possibility of use of all the
residual materials researched.
Key Words: structural masonry, concrete blocks, wood-cement coposites, pozzolanic materials,
residues.
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