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%
CaCl
2.2H
2O 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.
