| dc.description.abstract | Pathological manifestations in sealing masonry have been diagnosed early in
the area of connection between the masonry and the structure, causing a major
problem in civil construction, especially in the wedge region, so important and little
explored in research. Thus, there is a need for a specific Brazilian standard for the
execution and parameters of mortars for wedging. The objective of this work was to
research, compare data and evaluate the effectiveness of wedge mortars, identifying
the best flexible wedge mortar that is effective in minimizing pathological
manifestations in the wedge region. And which mortar dampens the structural
deformations that are transmitted to the masonry. To achieve the objective,
compression tests were carried out on walls with five different wedge mortars. The
deformations of the masonry and the wedge were evaluated, through laboratory tests
of characterization and mechanical resistance of the mortars, in the fresh and
hardened state, and the resistance of the mortars applied on walls. The tests in the
fresh state were carried out to determine the consistency index, specific mass and air
content. In the hardened state, the properties studied were water absorption, void ratio,
specific mass, dynamic modulus of elasticity and mechanical compressive and tensile
strengths in bending. And the wall shear and compression test, in order to determine
the deformation and the shear strength of the mortars applied in the wedge region. For
this specific study for the wedging region, it was limited to 4 mortars and polyurethane
foam, being 3 resilient mortars and 1 rigid mortar. The results of the mortars show that
the more resilient they are, with the modulus of elasticity and high incorporated air
content, the more they absorb the tensions imposed on the wall and the occurrence of
anomalies becomes later, according to the application of axial load in the sealing
system. In the case of polyurethane foam, which is highly flexible, the anomalies
appear early, with an applied load of 6 kN. On the other hand, the wall without wedge
obtained the first anomaly evidenced at 61 kN and there was a rupture at 82.54 kN.
While the industrialized mortar was the later, the first anomaly was evidenced at
137.20kN. | en |
