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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
ure 15 and Table 2 show the average values found.
Based on the results, it was detect that the differences be-
tween the results of RR pads were much smaller than the
others. Furthermore, these results have much lower stiff-
ness values compared with the LL and LR pads. Therefore,
as the aim of this work is to reduce the stiffness of the pads,
the results were satisfactory compared to those found by
previous studies. It is possible to conclude that, even with
different results between the castings, the RR pads have
good characteristics for their application. The results for the
reference mixture are presented in Figure 16 and Table 2.
In this case, there was no significant difference between the
two casts. Thus, we conclude that the differences found in the
mixtures with fibers are related to the addition of new materials.
Figure 17 shows a comparison of the stiffnesses. In this dia-
gram, the significant reduction in stiffness of the pads with the
Figure 18 – PP12 bearing pad details PP12 (a) before and (b) after the test
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B
Figure 19 – Stiffness results comparing 10MPa and 20MPa stresses
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B