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IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 1
M. K. EL DEBS | E.K. BELLUCIO
results use as reference 1:0.3:0.1 (Portland cement, sand and wa-
ter) and Montedor [5] added to this mixture V5L30F3 (5% of sand
replaced by expanded vermiculite-term, added 30% of latex and
3% of PVA fiber). Siqueira [6] utilized V10PP4L30 (10% of sand re-
placed by expanded vermiculite-term, added 4% of polypropylene
fiber and 30% of latex). Because of the battery molding process it
was necessary to modify the mixture in order to mold the mortar
and continue to meet the criteria of strength and toughness.
The amount of fiber incorporated to the mixture was due to the
workability of the mortar because it was necessary to have a flu-
id mass to mold it into the battery (Fig. 3). Since the goal is to
find a mixture with good strength, but with a low modulus of elastic-
ity, fibers are added as much as possible.
Based on preliminary studies, the following composition was estab-
the influence of surface roughness, pads were molded with two
smooth surfaces (LL); a smooth and a rough surface (LR); and
two rough surfaces (RR).
3.1 Utilized Materials
The utilized materials are as follows: a) Portland cement of high ini-
tial resistance (CP V-ARI), b) sand sifted by an ABNT30 sift with
hole diameter of 0.59 mm, c) expanded vermiculite-term with a
maximum dimension of 4.8 mm d) styrene-butadiene latex; super-
plasticizer agent based on a modified carboxylic ether chain, poly-
propylene fibers with nominal length of 10 mm, nominal diameter
of 12µm and specific weight of 0.90kg/dm³.
The mixtures utilized in previous studies which have had better
Figure 3 – Casting of pads utilizing the funnel and the 'comb'
A
C
B
D