USE OF WOOD RESIDUES OF Pinus spp. FOR SUBSTITUTION TO THE FINE AGGREGATE IN THE PRODUCTION OF CONCRETE BLOCKS FOR STRUCTURAL MASONRY

作者：Miranda de Lima Adauto Jose; Iwakiri Setsuo

来源：Ciencia Florestal, 2014, 24(1): 223-235.

• residue of Pinus spp.
• concrete blocks
• structural masonry

This research was developed with the objective of evaluating the potential use of residues of the production of Pinus spp. sawnwood, as substitution to the fine aggregate of the concrete used for the production of blocks for structural masonry. The evaluation of the physical characteristics (density, porosity and water absorption) and mechanics (compression and tension strength) of the concrete was evaluated in agreement with the ABNT normalization. Substitutions of the fine aggregate were tested by percentages of 0, 20, 40, 60, 80 and 100% of residue of Pinus spp. in natura, Pinus spp. in natura and with addition of 4,5% CaCl2 center dot 2H(2)O and residue of Pinus spp. pre-treated with extraction in cold water for 48 hours (AF-48H). The compositions were initially used for the production, in laboratory, of cylindrical specimens of 50 mm diameter, by the use of a molding system for vibrate-compression and later, for producing blocks, with optimized compositions, in vibrate-press commercial machine. Satisfactory results were obtained with substitutions of up to 50% of the mineral fine aggregate for the residue of Pinus spp.

• 出版日期2014-3