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Baustoffdesign
Thomas A. BIER
Institut für Keramik, Glas- und Baustofftechnik, Leipziger Straße 28, 09596 Freiberg,
BaustoffdesignZusatzmittel
Baustoffdesign
Funktionsorientierung durch Zusatzmittel
Type of Admixture
Accelerators
Retarders
Water reducers / Plasticisers
Thickeners (Stabilisers)
Defoamers
Air entraining agents
Type of Admixture
Accelerators
Retarders
Water reducers / Plasticisers
Thickeners (Stabilisers)
Defoamers
Air entraining agents
Desired Function
Rapid Hardening
Later Set, Flow
Strength, Flow
Anti Sedimentation
Strenght improvement
Freeze Thaw Resistance
Desired Function
Rapid Hardening
Later Set, Flow
Strength, Flow
Anti Sedimentation
Strenght improvement
Freeze Thaw Resistance
Baustoffdesign
Action of Binder and Admixtures during Hydration
Baustoffdesign
Hydration: Influence of Admixtures
CT = tri-sodium citrate
Li2CO3 = lithium carbonate
Baustoffdesign
• Nucleation• Growth of hydrates
• Solubility• Particle – Particle Interaction w/SP
• Intrinsic Strength• Porosity
I II
III
IV
Rheology and Structuring : Self Levelling Underlayments
Oscillation flow curves
0
10
20
30
40
50
60
70
80
90
0,1 1 10 100 1000
(rad/s)
(°
)
S6A_MFPP100FS6B_MF1641FS6C_MF2641FS6D_MF2651FS6F_Casein
Calorimetry (Versatz6b_Early time)
0
2
4
6
8
10
12
0 1 2 3 4 5
Time (hours)
Hea
t Evo
lutio
n (m
W/g
)
No.3_ohneNo.1_citricNo.1_citric_lithiumNo.3_allNo.2_vp2651No.2_vp2651_lithiumNo.3_SKW_pce_20%
vp+cit+lit
cit+lit
SKW_20%
cit
ohne
vp+lit
vp
Ref.
No.1 No.2
No.3
Equipment
Baustoffdesign
Einfluss von ZusatzmittelnCalorimetry (Versatz6b_Early time)
0
2
4
6
8
10
12
0 1 2 3 4 5
Time (hours)
Hea
t Evo
lutio
n (m
W/g
)
No.3_ohneNo.1_citricNo.1_citric_lithiumNo.3_allNo.2_vp2651No.2_vp2651_lithiumNo.3_SKW_pce_20%
vp+cit+lit
cit+lit
SKW_20%
cit
ohne
vp+lit
vp
Ref.
No.1 No.2
No.3
Equipment
Baustoffdesign
A B C D E At Bt Ct Dt Et A B C D E At Bt Ct Dt EtCAC FonduOPC CEM I 42,5R
QuarzandDolomit powder
Stabilizer CelluloseAccelerator Litium Carbonate
Citric acidTartaric acidMF PP100F 0,2 0,2 0,2 0,2MF 1641F 0,2 0,2 0,2 0,2MF 2641F 0,2 0,2 0,2 0,2MF 2651F 0,2 0,2 0,2 0,2Casein 0,2 0,2 0,2 0,2
12 20
System 1 System 2
19 4- 77 -
41 3820 28
2
0,050,1
0,2 - 0,02 -- 0,2 - 0,02
Plasticizer
Retarder
HemihydrateAnhydrite
Resin powder
Plasticizers(PCE)
Principalchainlength
Sidechainlength
Rate of adsorption(Charge density)
MF PP100F 3.3 nm 3.3 nm No. 1MF 1641F 18 nm 13 nm No. 2MF 2641F 10 nm 38 nm No. 4MF 2651F 25 nm 38 nm No. 3
MF PP100F
MF 1641F
MF 2641F MF 2651F
Baustoffdesign
0:00 0:30 1:00 1:30 2:00 2:30 3:00 3:30 4:00 4:30
Dt : MF 2651F
Ct : MF 2641F
Bt : MF 1641F
At : MF PP100F
E : Casein
D : MF 2651F
C : MF 2641F
B : MF 1641F
A : MF PP100F
Time (hh:mm)0:00 0:30 1:00 1:30 2:00 2:30 3:00 3:30 4:00 4:30
Dt : MF 2651F
Ct : MF 2641F
Bt : MF 1641F
At : MF PP100F
E : Casein
D : MF 2651F
C : MF 2641F
B : MF 1641F
A : MF PP100F
Time (hh:mm)
Setting time (hh:mm) (w/p=24%) Setting time (hh:mm) (w/p=24%)
initial final initial final initial final initial finalA PP100 : 0.2% 0:50 1:07 2:21 2:54 A PP100 : 0.2% 0:27 0:29 0:28 0:31B 1641F : 0.2% 0:51 1:04 3:31 4:15 B 1641F : 0.2% 0:20 0:22 0:22 0:24C 2641F : 0.2% 0:57 1:01 2:31 2:56 C 2641F : 0.2% 0:19 0:21 0:20 0:21D 2651F : 0.2% 0:52 0:56 3:14 3:50 D 2651F : 0.2% 0:20 0:22 0:21 0:23E Casein : 0.2% 0:59 1:08 - -
System 1 Citric 0.02% Tartaric 0.02%Citric 0.2% Tartaric 0.2% System 2
System 1System 2
Baustoffdesign
Citr
ic a
cid
Citr
ic a
cid
Citr
ic a
cid
Citr
ic a
cid C
itric
aci
d
Citr
ic a
cid
Citr
ic a
cid
Citr
ic a
cid
Citr
ic a
cid
Citr
ic a
cid
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
Tart
aric
aci
d
0
5
10
15
20
25
30
35
40
45
MFPP100F
MF 1641F MF 2641F MF 2651F Casein MFPP100F
MF 1641F MF 2641F MF 2651F Casein
Flow
val
ue (c
m)
System 1 (Retarder = 0.2 wt%) System 2 (Retarder = 0.02 wt%)
Experimental – Self Flow Values
Baustoffdesign
0
2
4
6
8
10
0 3 6 9 12 15 18 21 24Time (hours)
Hea
t Evo
lutio
n (m
W/g
)
A_MFPP100FB_MF1641FC_MF2641FD_MF2651FE_Casein
Calorimetry and Setting Time (System 1, Citric acid, W/P = 24%)Setting time
0
2
4
6
8
10
40 50 60 70 80Time (minutes)
Hea
t Evo
lutio
n (m
W/g
)
Baustoffdesign
-1000
-500
0
500
1000
1500
2000
0 3 6 9 12 15 18 21 24Time (hours)
Shrin
kage
/ Ex
pans
ion
( m
/m)
A_MFPP100FB_MF1641FC_MF2641FD_MF2651FE_Casein
(System 1, Citric acid, W/P = 24%)
-300
-200
-100
0
100
200
30 40 50 60 70 80Time (minutes)
Shrin
kage
/ Ex
pans
ion
( m
/m)
Setting time
Experimental - Shrinkage
Baustoffdesign
Mix design: Self-consolidating mortarOPC: CEM I 52,5 R Secondary Raw Material (SRM): Fly ash (FA), Lime stone
powder (LSP)Quartz Sand: - 0...2 mm
- 0...1 mmSuper plasticizer: PCE
OPC SRM Sand Water Super-plasticizer
200g 200g 600g 160g 0.36 ... 1.07g
Materials
Baustoffdesign
Technological Properties: Setting TimeResults
0
5
10
15
20
25
30
35
40
45
300 350 400 450 500 550 600 650 700 750 800
Time (min)
Pene
trat
ion
Dep
th (m
m)
Polymer
Starch
GUM
Cellulose 6000
Cellulose 200 8,5 h 10 h 11.5 h
Cellulose 6000 GumPolymer
Cellulose 200 M Potato starch
Baustoffdesign
Rheological properties: Flow Curves Shear Thinning behavior
0
5000
10000
15000
20000
25000
30000
35000
0 50 100 150 200 250 300
Shearrate (1/s)
App
aren
t Vis
cosi
ty (m
Pas)
PolymerStarch
Cellulose 200Gum
Cellulose 6000
Baustoffdesign
Technological Characterization through Workability Boxes
0,002670,004
0,0067
0,00267
0,00133
0,0067
0,05
0,013
0,05
0,05
0,0005
2
4
6
8
10
12
14
16
18
150 200 250 300 350
Self Flow Value (mm)
V-F
unne
l Tim
e (s
)
StarchGumCellulose 200PolymerNo StabiliserCellulose 6000
Baustoffdesign
Technological Characterization through Workability Boxes
No Stabiliser; 0,0005
Cellulose 200; 0,013Cellulose 6000; 0,05
FA W/C 0.4; 0,11
LSP I W/C 0.4; 0,01
Gum; 0,00267 Starch; 0,00267
Polymer; 0,05
LSP II W/C 0.4; 0,09
2
4
6
8
10
12
14
270 280 290 300 310 320 330
Self Flow Value (mm)
V-F
unne
l Tim
e (s
)
Baustoffdesign
Technological Characterization through Workability Boxes
FA W/C 0.4; 0,114
LSP I W/C 0.4; 0,009
Polymer; 0,05
FA W/C 0.3; 0,009
LSP I W/C 0.3; 0,005
LSP II W/C 0.3; 0,005
LSP II W/C 0.4; 0,090
6
8
10
12
270 280 290 300 310 320 330
Self Flow Value (mm)
V-F
unne
l Tim
e (s
)
Baustoffdesign
0
2
4
6
8
10
0 3 6 9 12 15 18 21 24Time (hours)
Hea
t Evo
lutio
n (m
W/g
)Calorimetry and Setting Time (System 1, Tartaric acid, W/P = 24%)
Setting time
0
1
2
3
4
0 1 2 3 4 5 6Time (hours)
Hea
t Evo
lutio
n (m
W/g
) At_MFPP100FBt_MF1641FCt_MF2641FDt_MF2651F
Baustoffdesign
0
2
4
6
8
10
12
14
16
18
20
0 3 6 9 12 15 18 21 24Time (hours)
Hea
t Evo
lutio
n (m
W/g
)
A_MFPP100FB_MF1641FC_MF2641FD_MF2651F
Calorimetry and Setting Time (System 2, Citric acid, W/P = 24%)
Setting time
0
5
10
15
20
5 10 15 20 25 30 35 40 45Time (minutes)
Hea
t Evo
lutio
n (m
W/g
)
Baustoffdesign
0
2
4
6
8
10
12
14
16
18
20
0 3 6 9 12 15 18 21 24Time (hours)
Hea
t Evo
lutio
n (m
W/g
)
At_MFPP100FBt_MF1641FCt_MF2641FDt_MF2651F
Calorimetry and Setting Time (System 2, Citric acid, W/P = 24%)
Baustoffdesign
-1000
-500
0
500
1000
1500
2000
0 3 6 9 12 15 18 21 24Time (hours)
Shrin
kage
/ Ex
pans
ion
( m
/m)
At_MFPP100FBt_MF1641FCt_MF2641FDt_MF2651F
(System 1, Tartaric acid, W/P = 24%)
-400
-300
-200
-100
0
100
0 1 2 3 4 5 6Time (hours)
Shrin
kage
/ Ex
pans
ion
( m
/m)
Setting time
Experimental - Shrinkage