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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
The stiffness for the loading of 20MPa are higher than those of
10MPa. This is due to the fact that this sample was submitted
to the cyclic loads of 2.5MPa and 5MPa, as the 10MPa sample.
It also received all the cyclic loading of 10MPa, therefore, the
sample is more compressed.
Analyzing the values of the results and comparing the rough-
ness, it is observed in Figure 21 that there were not significant
differences between the results. It is believed that the pads
have suffered adaptations due to the previous loadings. There-
fore, the roughness did not affect the results.
Besides stiffness, the accumulated deformations were also
analyzed. The results for the studied mixtures are shown in
Figure 22. Through the results it is clear that the pad suffers
a higher plasticization for the loading of 10MPa. This is due
to the fact that this loading was applied before the loading of
20MPa; hence the sample is already deformed. The perfor-
mance of the mixtures can be observed in Figure 23.
It is possible to see a larger deformation in the pads of mixture
PP12 when analyzing the diagram. This deformation occurs as
expected, since the purpose of this pad is to be more deform-
Figure 22 – Accumulated deformation results comparing stiffness
A
B
Figure 23 – Accumulated deformation results comparing mortars
A
B