INFLUENCE OF AIR ENTAINING AGENTS ON RHEOLOGICAL ... · ON RHEOLOGICAL PROPERTIES OF SUPERPLASTICIZED MORTARS 13. Kolloquium und Workshop über „Rheologie mineralischer Baustoffe“

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%


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%


C3A = 12%; Swł = 370 m2/kg AE1; SP PE 3%; W/C = 0,40

13 - 14

5

10 - 12

2 - 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%


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]


0

10

20

30

40

50

60

0 0,3 0,6

AE content [% C]

g [

Nm

m]


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


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%


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]


-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]


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%


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%


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]


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


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


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.

Documents

INFLUENCE OF AIR ENTAINING AGENTS ON RHEOLOGICAL ... · ON RHEOLOGICAL PROPERTIES OF SUPERPLASTICIZED MORTARS 13. Kolloquium und Workshop über „Rheologie mineralischer Baustoffe“