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INFLUENCE OF AIR ENTAINING AGENTS INFLUENCE OF AIR ENTAINING AGENTS ON RHEOLOGICAL PROPERTIES ON RHEOLOGICAL PROPERTIES
OF SUPERPLASTICIZED MORTARSOF SUPERPLASTICIZED MORTARS
13. Kolloquium und Workshop über„Rheologie mineralischer Baustoffe“
FH Regensburg, 10. und 11.März 2004
Jacek Gołaszewski, Janusz SzwabowskiSilesian University of Technology, Gliwice, Poland
INTRODUCTIONINTRODUCTION
Air entrainment - essential for durability of concrete.
Ice pressure
Ice pressure Ice pressure
Capillary water
Air pore
Air pore Capillary water
Without air entraining admixture
With air entraining admixture
INTRODUCTIONINTRODUCTION
Air entrainment - changes the rheological propertiesof fresh concrete.
How AE admixtures influencing rheological properties of fresh HPC and SCC when
different cement - SP - (FA) systems are used?
g
h
+AE
VARIABLESVARIABLES
Cement - 4 cements of different C3A (2 & 12%) and Na2Oeq (0,3 & 1,1%) content
g
h
PE1 PE3
Superplasticizer - 2 SP’s of PE type - 0,5% (2% C3A) - 3,0% (12% C3A)
VARIABLESVARIABLES
Cement - 4 cements of different C3A (2 & 12%) and Na2Oeq (0,3 & 1,1%) content
Superplasticizer - 2 SP’s of PE type - 0,5% (2% C3A) - 3,0% (12% C3A)
Fly Ash - 20% as C replacement
Air-entraining agent - AE1 - 0,3%; 0,6%- AE2 - 0,3%
Cement grade - 32,5; 42,5; 52,5 (320; 370; 420 m2/kg)
TESTING METHODTESTING METHOD
Measurement of rheological properties:
rheometrical workability test (RWT)
Measurements wereperformed in conditions acc: PN EN 196-1:1996 PN EN 934-2:1999.
On normal mortars acc. PN EN 196-1:1996
Viskomat PC
M = 0,368 N + 15,70r = 0,993
0
10
20
30
40
50
60
70
0 50 100 150
N [1/min]
M [N
mm
]
M = 0,385 N + 20,83r = 0,994
0
10
20
30
40
50
60
70
0 50 100 150
N [1/min]
M [
Nm
m]
g & h after 10 min
TESTING PROCEDURETESTING PROCEDURE
M = g + h N
g & h after 60 min
0
40
80
120
160
0 10 20 30 40 50 60 70Time [min]
M [N
mm
]
0
30
60
90
120
150
0 10 20 30 40 50 60 70
Time [min]
N [
1/m
in]
Measurenment of g and h after 10 i 60 min
0
30
60
90
120
150
0 10 20 30 40 50 60 70
Time [min]
N [
1/m
in]
Measurenment of g and h after 10 i 60 min
0
10
20
30
40
50
60
0 0,3 0,6
AE content [% C]
g [
Nm
m]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT INFLUENCE OF AE ON CEMENT SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 2%; Swł = 370 m2/kg AE1; SP PE 0,5%; W/C = 0,40
10 - 12
� - air content [%]
2 - 3
9 - 102 - 3
0
0,1
0,2
0,3
0,4
0,5
0,6
0 0,3 0,6
AE content [% C]
h [
Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT INFLUENCE OF AE ON CEMENT SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 2%; Swł = 370 m2/kg AE1; SP PE 0,5%; W/C = 0,40
-1
-0,5
0
0,5
1
1,5
2
2,5
0 0,3 0,6
AE content [% C]
dg
/dt
[Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
-3,5-3
-2,5-2
-1,5-1
-0,50
0,51
1,52
2,53
3,5
0 0,3 0,6
AE content [% C]
dh
/dt
[Nm
mm
in/m
in*E
3]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
0
10
20
30
40
50
60
0 0,3 0,6
AE content [% C]
g [
Nm
m]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT INFLUENCE OF AE ON CEMENT SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 12%; Swł = 370 m2/kg AE1; SP PE 3%; W/C = 0,40
13 - 14
5
10 - 12
2 - 3
� - air content [%]
0
0,1
0,2
0,3
0,4
0,5
0,6
0 0,3 0,6
AE content [% C]
h [
Nm
mm
in]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT INFLUENCE OF AE ON CEMENT SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 12%; Swł = 370 m2/kg AE1; SP PE 3%; W/C = 0,40
-1
-0,5
0
0,5
1
1,5
2
2,5
0 0,3 0,6
AE content [% C]
dg
/dt
[Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
-3,5-3
-2,5-2
-1,5-1
-0,50
0,51
1,52
2,53
3,5
0 0,3 0,6
AE content [% C]
dh
/dt
[Nm
mm
in/m
in*E
3]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
0
10
20
30
40
50
60
0 0,3 0,6
AE content [% C]
g [
Nm
m]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT + FA INFLUENCE OF AE ON CEMENT + FA SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 2%; Swł = 370 m2/kg; FA = 20% as C replacement AE1; SP PE 0,5%; W/C = 0,40
3
11
4
10
� - air content [%]
0
0,1
0,2
0,3
0,4
0,5
0,6
0 0,3 0,6
AE content [% C]
h [
Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
0
0,1
0,2
0,3
0,4
0,5
0,6
0 0,3 0,6
AE content [% C]
h [
Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
0
10
20
30
40
50
60
0 0,3 0,6
AE content [% C]
g [
Nm
m]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT + FA INFLUENCE OF AE ON CEMENT + FA SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 2%; Swł = 370 m2/kg; FA = 20% as C replacement AE1; SP PE 0,5%; W/C = 0,40
-1
-0,5
0
0,5
1
1,5
2
2,5
0 0,3 0,6
AE content [% C]
dg
/dt
[Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
-3,5-3
-2,5-2
-1,5-1
-0,50
0,51
1,52
2,53
3,5
0 0,3 0,6
AE content [% C]
dh
/dt
[Nm
mm
in/m
in*E
3]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
-3,5-3
-2,5-2
-1,5-1
-0,50
0,51
1,52
2,53
3,5
0 0,3 0,6
AE content [% C]
dh
/dt
[Nm
mm
in/m
in*E
3]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
0
10
20
30
40
50
60
0 0,3 0,6
AE content [% C]
g [
Nm
m]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT + FA INFLUENCE OF AE ON CEMENT + FA SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 12%; Swł = 370 m2/kg; FA = 20% as C replacement AE1; SP PE 3%; W/C = 0,40 � - air content [%]
13
4
3
10
0
0,1
0,2
0,3
0,4
0,5
0,6
0 0,3 0,6
AE content [% C]
h [
Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
0
10
20
30
40
50
60
0 0,3 0,6
AE content [% C]
g [
Nm
m]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
0
0,1
0,2
0,3
0,4
0,5
0,6
0 0,3 0,6
AE content [% C]
h [N
mm
min
]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
INFLUENCE OF AE ON CEMENT + FA INFLUENCE OF AE ON CEMENT + FA SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS
C3A = 12%; Swł = 370 m2/kg; FA = 20% as C replacement AE1; SP PE 3%; W/C = 0,40
-1
-0,5
0
0,5
1
1,5
2
2,5
0 0,3 0,6
AE content [% C]
dg
/dt
[Nm
mm
in]
PE1, Na2Oeq = 0,3%
PE1, Na2Oeq = 1,1%
PE3, Na2Oeq = 0,3%
PE3, Na2Oeq = 1,1%
-3,5-3
-2,5-2
-1,5-1
-0,50
0,51
1,52
2,53
3,5
0 0,3 0,6
AE content [% C]
dh
/dt
[Nm
mm
in/m
in*E
3]
PE1, Na2Oeq = 0,3%PE1, Na2Oeq = 1,1%PE3, Na2Oeq = 0,3%PE3, Na2Oeq = 1,1%
0
0,1
0,2
0,3
0,4
0,5
0 0,2 0,4 0,6 0,8
AE content [% C]
h [
Nm
mm
in] PE1/320 m2/kg
PE1/370 m2/kg
PE1/420 m2/kg
PE3/320 m2/kg
PE3/370 m2/kg
PE3/420 m2/kg
0
10
20
30
40
50
60
0 0,2 0,4 0,6 0,8
AE content [% C]
g [
Nm
m]
PE1/320 m2/kg
PE1/370 m2/kg
PE1/420 m2/kg
PE3/320 m2/kg
PE3/370 m2/kg
PE3/420 m2/kg
INFLUENCE OF AE ON INFLUENCE OF AE ON SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS WITH DIFFERENT GRADE CEMENTS WITH DIFFERENT GRADE CEMENTS
AE1; C3A = 7%;SP PE 1%;W/C = 0,40
-3,5-2,5-1,5-0,50,51,52,53,5
0 0,2 0,4 0,6 0,8
AE content [%]
dh
[N
mm
min
/min
*E3] PE1/320 m2/kg
PE1/370 m2/kg
PE1/420 m2/kg
PE3/320 m2/kg
PE3/370 m2/kg
PE3/420 m2/kg
AE1; C3A = 7%;SP PE 1%;W/C = 0,40
-1-0,5
00,5
11,5
22,5
0 0,2 0,4 0,6 0,8
AE content [% C]
dg
[N
mm
/min
]
PE1/320 m2/kg
PE1/370 m2/kg
PE1/420 m2/kg
PE3/320 m2/kg
PE3/370 m2/kg
PE3/420 m2/kg
INFLUENCE OF AE ON INFLUENCE OF AE ON SUPERPLASTICIZED MORTARS SUPERPLASTICIZED MORTARS WITH DIFFERENT GRADE CEMENTS WITH DIFFERENT GRADE CEMENTS
INFLUENCE OF AE - GENERAL TRENDS INFLUENCE OF AE - GENERAL TRENDS
g
h
SP PE1
SP PE3
+ AE
Changes g&h in time
INFLUENCE OF AE TYPE INFLUENCE OF AE TYPE
C3A = 12%; Swł = 370 m2/kg; AE1, AE2; SP PE 3%; W/C = 0,40
0
10
20
30
40
50
60
0 0,3 0,6AE content [% C]
g [
Nm
m]
PE1, AE1 PE3, AE1PE1, AE2 PE3, AE2
0
0,1
0,2
0,3
0,4
0,5
0,6
0 0,3 0,6AE content [% C]
h [
Nm
mm
in]
PE1, AE1 PE3, AE1
PE1, AE2 PE3, AE2
INFLUENCE OF AE TYPE INFLUENCE OF AE TYPE
C3A = 12%; Swł = 370 m2/kg; AE1, AE2; SP PE 3%; W/C = 0,40
-1
-0,5
0
0,5
1
1,5
2
2,5
0 0,2 0,4 0,6 0,8
AE content [% C]
dg
/dt
[Nm
m/m
in]
PE1, AE1 PE3, AE1
PE1, AE2 PE3, AE2
-3,5-3
-2,5-2
-1,5-1
-0,50
0,51
1,52
2,53
3,5
0 0,2 0,4 0,6 0,8
AE content [% C]
dh
/dt
[Nm
mm
in/m
in*E
3]
PE1, AE1 PE3, AE1
PE1, AE2 PE3, AE2
g
h
+ AE
CORRECTION OF AE INFLUENCECORRECTION OF AE INFLUENCE
- SP
- W
Range of required g&h
0
40
80
120
160
PE1, W/C 0,4
PE1, AE1,W/C 0,4
PE1, AE1,W/C 0,35
PE1, AE1,W/C 0,3
g [
Nm
m]
10 min 60 min
0
0,1
0,2
0,3
0,4
0,5
PE1, W/C 0,4
PE1, AE1,W/C 0,4
PE1, AE1,W/C 0,35
PE1, AE1,W/C 0,3
h [
Nm
mm
in]
10 min 60 min
CORRECTION OF AE INFLUENCECORRECTION OF AE INFLUENCE
0
40
80
PE1, W/C 0,4
PE1, AE1,W/C 0,4
PE1, AE1,W/C 0,35
PE1, AE1,W/C 0,3
Rb
[MP
a]
13,5%
10,5%5,5%
C3A = 2%; Swł = 320 m2/kg; AE1 = 0,6%; SP PE1 0,5%;
0
20
40
60
80
PE3, W/C 0,4
PE3, AE1,W/C 0,4
PE3, AE1,W/C 0,35
PE3, AE1,W/C 0,3
g [
Nm
m]
10 min 60 min
0
0,1
0,2
0,3
0,4
0,5
PE3, W/C 0,4
PE3, AE1,W/C 0,4
PE3, AE1,W/C 0,35
PE3, AE1,W/C 0,3
h [
Nm
mm
in]
10 min 60 min
CORRECTION OF AE INFLUENCECORRECTION OF AE INFLUENCE
0
40
80
PE3, W/C 0,4
PE3, AE1,W/C 0,4
PE3, AE1,W/C 0,35
PE3, AE1,W/C 0,3
Rb
[MP
a]
12,0%
10,0%
2,5%
C3A = 7%; Swł = 420 m2/kg; AE1 = 0,6%; SP PE3 1%;
SUMMARYSUMMARY
➨ In the paper basic effects of AE agent on the rheological properties of fresh concretes were presented.
➨ Effective method of correction of AE influence on rheological properties was proposed.
➨ Effect of AE agent on workability should be studied on the stage of choosing compatible cement - SP system.
➨ Using RWT it is possible to check AE influence on rheological properties of concrete and work out the procedure of correction of workability of air entrained concrete.