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IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 4
Self-compacting concretes (SCC) – comparison of methods of dosage
most recalled by designers and other professionals. The SCC modulus
of elasticity test, based on ABNT NBR 8522:2008 [10], was carried out
because that is an important characteristic which impacts the removal
of the structural pieces from their molds while it is also a reason why
some professionals choose not to use SCC, once it may face a signifi-
cant reduction in its value due to the materials used in its composition.
Table 5 – chemical, fisical and mechanical properties of CP-V-ARI
Chemical properties
Fisical and mechanical properties
Cement chemical composition
Results (%)
Set time
Begining
02h22min
Silicon dioxide(SiO )
2
18,67
End
03h04min
Aluminum oxide (Al O )
2 3
4,07
Bulk Density
3
(g/cm )
3,13
Calcium oxide (CaO)
59,90
Compressive
strenght
(MPa)
1 day
20,5
Iron oxide (Fe O )
2 3
2,56
3 days
33,8
Magnesium oxide (MgO)
5,31
7 days
40,5
Sulfur oxide (SO )
3
3,02
28 days
48,6
Loss on ignition
3,32
Freedom CaO
1,70
Insoluble residue
0,64
Equivalent alkali
0,63
Table 6 – characteristics of the aggregates used in mixtures of SCC
Opening of sieves (mm)
Gravel 25 mm
Gravel 19 mm
Regular sand
Fine sand
Amount retained acumulated (%)
# 25
0
0
0
0
# 19
7
0
0
0
# 12,5
35
16
0
0
# 9,5
70
31
0
0
# 6,3
99
86
0
0
# 4,8
100
100
0
0
# 2,4
100
100
15
0
# 1,2
100
100
32
0
# 0,6
100
100
56
3
# 0,3
100
100
97
17
# 0,15
100
100
9
84
# 0,075
100
100
100
99
Depth (< 0,075)
100
100
100
100
Fineness modulus
6,77
6,31
2,11
1,04
Maximum size
25 mm
9,5 mm
4,8 mm
0,6 mm
Bulk density
3,07 kg/dm³
2,86 kg/dm³
2,34 kg/dm³
2,33 kg/dm³
Unit mass compacted
1,70 kg/dm³
1,50 kg/dm³
1,63 kg/dm³
1,56 kg/dm³
Unit mass in the released state 1,62 kg/dm³
1,39 kg/dm³
1,47 kg/dm³ 1,50 kg/dm³