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IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 4
Self-compacting concretes (SCC) – comparison of methods of dosage
basalt gravel cost 0.022 R$/Kg, and the superplasticizer admixture
used cost 14.50 R$/Kg.
4.1 Fresh state tests results
Table 8 shows the results for the tests performed to assess the
SCC behavior in the fresh state.
Considering the results obtained in the fresh state, it was possible to
Table 8 – results of the fresh properties
Method
Trace
(1:m)
Spread
T
500mm
“L-Box”
“V-Funnel”
Result
(mm)
Class
NBR
15823
Result
(s)
Class
NBR
15823
Result
(h2/h1)
Class
NBR
15823
Result
(s)
Class
NBR
15823
Nan Su
et al.
1:4,28
710
SF2
2
VS1
0,90
PJ1
9
VF2
Repette-
Melo
1:3,50
690
SF2
2
VS1
0,90
PJ1
7
VF1
1:3,97
660
SF2
2
VS1
0,90
PJ1
6
VF1
1:4,32
610
SF1
1
VS1
0,80
PJ1
5
VF1
Tutikian
1:3
710
SF2
2
VS1
0,90
PJ1
7
VF1
1:4
690
SF2
2
VS1
0,85
PJ1
6
VF1
1:5
640
SF1
1
VS1
0,85
PJ1
5
VF1
1:6
590
SF1
1
VS1
0,80
PJ1
5
VF1
conclude that the values achieved in the procedures carried out to
assess SCC self-compactibility, as shown in Table 8, were satisfy-
ing, for they fit the standards outlined by ABNT NBR 15823:2010 [4].
In each family executed, it was verified that the SCC unit composi-
tion which provided the most cohesion, fluidity and viscosity was
the one which presented the highest cement consumption, a larger
amount of mortar and consequently a smaller gravel consumption
per m³, which allows the concrete more freedom to flow.
Table 9 – values for the comparisons between the three methods of the experimental program
COMPARISONS BETWEEN METHODS
Nan Su et al., Repette-Melo e Tutikian & Dal Molin
Property
Reference
Comparison
Values of
reference
Compressive
strength at 7,28
and 91 days
Unit trace
Compressive strength at 7, 28 and 91 days for the
same unit traces
4,28
Cost
Compressive strength
at 7 days
Cost of the mixtures for the same range of
compressive strength at 7 days
36,7 MPa
Cost
Compressive strength
at 28 days
Cost of the mixtures for the same range of
compressive strength at 28 days
42,6 MPa
Cost
Compressive strength
at 91 days
Cost of the mixtures for the same range of
compressive strength at 91 days
48,8 MPa
Modulus of
elasticity
Compressive strength
at 91 days
Modulus of elasticity for the same range of
compressive strength at 91 days
48,8 MPa
Ultrasound
Compressive strength
at 91 days
Ultrasound for the same range of compressive
strength at 91 days
48,8 MPa
Chloride ions
penetration
Compressive strength
at 91 days
Chloride ions penetration for the same range of
compressive strength at 91 days
48,8 MPa