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IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 1
Cement-base bearing pads mortar for connections in the precast concrete: study of surface roughness
There are no significant differences between the tensile strengths. There
is a tendency of the strength values of the reference mortar being slightly
larger than the others. For the modulus of elasticity test, comparing the
results of modified mortars with the reference mixture, there is a signifi-
cant decrease in this parameter. This is themain focus of the research: the
material should be as deformable as possible to be used as bearing pad.
The results of this test are consistent with those obtained by Siqueira [6]
(35MPa of compression, 2.7 MPa of tensile strenght and 13.2 GPa of
modulus of elasticity), and even with lower values of compression, they
are sufficient to be used in bearing pads.
4.2 Mortar characterization tests in strips of pads
a) Test of concentrated load
Ten strips of each mixture were tested and an analysis of the
Figure 13 – (a) Results of bending test of the reference mixture; (b) Details of diagram
of initial deformations
A
B
Figure 14 – Picture of the bending test
of the PP12 mixture
Figure 15 – PP12 mixture stiffness results
Figure 16 – Reference mixture stiffness results