800
600
Pozzutec 20
@ 100 mL/kg
400
EY-11
Pozzutec 20
@ 100 mL/kg
@ 60 mL/kg
Corr.
Line
200
Reference
Reference
EY-11
@ 60 mL/kg
0
4
8
12
16
20
24
28
32
36
40
44
Weeks
Figure 7. Lollipop specimens, 75- 150-mm (3 6 in.) cylinders ponded half-
height in sodium chloride solution.
low dosages initiated corrosion at 8 and 21 weeks,
test specimen not to have initiated corrosion with
respectively, and Pozzutec 20, again at the high
the lower dosage of 60 mL/kg (90 fl oz/cwt), but
and low dosages, initiated corrosion at two and
to have initiated corrosion at the higher dosage
ten weeks, respectively. Therefore, like the larger
level. Likewise, Pozzutec 20 was found to have
cylinders, the lower dosage only (60 mL/kg, 90 fl
initiated corrosion, with the higher dosage caus-
oz/cwt) of EY-11 did not cause corrosion initia-
ing damage earlier than the lower 60-mL/kg dos-
age.
tion, and provided evidence that EY-11 was po-
Another similar test was run using the same
tentially less corrosive to steel rebar. The higher
lollipop method, but this time with only 50-
EY-11 dosage (150 fl oz) initiated corrosion at an
100-mm (2 4 in.) cylinder specimens, to deter-
even later time than the lower dosage (90 fl oz) of
Pozzutec 20. Also, as for the specimen size, the
mine if specimen size mattered. The same dosage
smaller the test cylinder, the earlier the initiation
levels of the two admixtures were repeated, as
of corrosion. It is most important here to restate
were the two references. Figure 8 shows that the
that the admixtures Pozzutec 20 and EY-11 did
two admixture-free references initiated corrosion
not cause corrosion to occur without chloride ions
at Weeks 15 and 16, while EY-11 at the high and
800
Pozzutec 20
@ 100 mL/kg
600
Reference
EY-11
Pozzutec 20
@ 100 mL/kg
Reference
@ 60 mL/kg
400
EY-11
@ 60 mL/kg
Corr.
Line
200
0
4
8
12
16
20
24
28
32
36
Weeks
Figure 8. Lollipop specimens, 50- 100-mm (2 4 in.) cylinders ponded half-
height in sodium chloride solution.
16
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