SILVA, J. G. S.; http://lattes.cnpq.br/3601425171545121; SILVA, José Glêdson de Sousa.
Résumé:
Aiming at sustainability practices in civil construction, it isproposed the use of
fragmented, flat tempered glass replacing the crushed stone in concrete in
replacement percentages of 0%, 50% and 100%. The research aimed at the
microstructural analysis in concrete with traces fixed in 1:3, water/cement factors of
0.45, 0.55 and 0.65, and replacement percentage of 0%, 50% and 100%, subjected
to curing in a saturated, calcium-hydroxide humid chamber at the ages of 7, 14 and
28 days. The raw materials were characterized by particle size analysis. The
concrete in the fresh state was classified in rebate by conical frustum. The concrete
of reference obtained classes from S10 toS160, whereas the concrete with glass
addition ranged from S50 to S220. The cylindrical specimens with dimensions of 5
cm x 10 cm underwent strength tests in simple compression(RCS). The concrete of
reference(0% of glass) were qualified with resistance class of C20 and C25, and the
resistance class of the concrete with replacement rate of 50% ranged from C15 to
C30, whereas the class of the concrete with the rate of 100% ranged from C15 to
C20. To the study of the adhesion level in the glass/pasteinterface, there were used
images that were obtained via USB digital microscopy and scanning electron
microscope, noting well preserved interfaces even after rupture under compression.
It was used x-ray diffraction in the process, noting similar structures for the various
factors and crystallinity average value greater than 94%. Using dispersive energy
microanalysis, it was discovered that the concrete with partial and full percentage has
its chemical nature similar to the concreteof reference. The values of RCS and the
behavior of glass as coarse aggregate permit the use of concrete in structural
applications such as slabs and pillars, and in non-structural ones, like in pavings and
floors.
