081200baalbakiresults.ppt

Laboratory work – November 19 - 2008
Course for Cement Applications
 Holcim Cone TM tool concept
 Cement / Superplasticizer compatibility
 Self-Compacting concrete
Moussa Baalbaki / Michael Romer / Anatol Zingg
HGRS/PID

2
(optional) 04.09.2022/SN/SN
(optional) Filename.ppt
Holcim Group Support CCA 2008
Tasks & groups - Wednesday, November 19, 2008
Topic – AM session Water demand with Holcim Cone TM
Responsible M. Baalbaki M. Romer / A. Zingg
11:30 – 12:50 Group 1 (EN Room) Group 2 (Rheology Room)
12:50 – 13:50 Lunch
Topics – PM session
Cement/admixture
compatibility
Self-compacting concrete
Responsible M. Romer / A. Zingg M. Baalbaki
14:00 – 15:20 Group 1 (EN Room) Group 2 (Concrete Room)
15:20 – 16:00 Coffee break - Betonlabor
16:00 – 17:20 Group 2 (EN Room) Group 1 (Concrete Room)

3
Objectives of the laboratory work
 Cement/superplasticer compatibility
 Introduce the new Holcim cone TM application based test
method to assess
- The water demand for a given cement according to its intrinsic
characteristics
- the cement/admixture compatibility
 Self-compacting concrete
 Produce self-compacting concrete according to the powder
and to the admixture (viscosity enhancer admixture)
approaches
 Present different test methods to assess the self-
compactability properties (self-flowing, resistance to
blocking and deformability)

Holcim Cone TM
Cement / superplasticer compatibility

5
Holcim cone tool concept
A two-step test
 Step 1 – intrinsic characteristic of the cement in terms of
water demand and strength are determined
 Results depend only on the physical and chemical
characteristics of the cement
 Done without water reducers or superplasicizers
 Can be used in normal cement production
 Step 2 – from cement quality to concrete performance
requirements
 Determination of water reduction to meet requirements for
workability and design strength
 Assessment of best economical & available admixtures
that meet concrete performance

6
How concrete is specified
EN 206-1
C25/30
Classes of
compressive
strength
XC4
XF1
Classes of
exposure
Dmax = 32
Maximum
size of
Aggregates
Cl 0,20
Classes of
chloride
content
C3
Classes of
workability

7
Application example – Civil Engineering
Reinforced
foundation
non-reinf. concrete carriage way Bkl. SV. I - III
hutch base
underwater concrete
Cap
non-reinf. concrete carriage way
Superstructure
Cap
parapet wall
Bore
pile
Hydraulically bounded gravel base
parapet wall
XF4
XF4
XO
XC
XD
XF
XA

8
Classes of Workability
 According to the methods used in Switzerland to
measure workability
Class value [mm] Class value [mm] Class value [mm]
F1** ≤ 340 C0** ≥ 1,46 S1 10 - 40
F2 350 - 410 C1 1,45 - 1,26 S2 50 - 90
F3 420 - 480 C2 1,25 - 1,11 S3 100 - 150
F4 490 - 550 C3 1,10 - 1,04 S4 160 - 210
F5 560 - 620 S5** ≥ 220
F6** ≥ 630
Slump flow Walz Index Slump
** classes not recommended for this method due to the lack of accuracy in the measurement

9
HC TM vs EN 206 class of consistency
S class
Slump
F class
DIN
flow
HC TM
flow
Mortar of concrete < 5 mm
No compaction
With compaction
No compaction

10
S3
F3
S4
F4
S5
F5
S2
F2
ASTM slump VS DIN flow – EN 206 class of consistency
 Good correlation between ASTM and DIN concrete slump
y = 0.8725x + 341.45
R2
= 0.9058
360
400
440
480
520
560
600
0 20 40 60 80 100 120 140 160 180 200 220 240 260
ASTM slump (mm) - S
DIN
slump
flow
(mm)
-
F

11
Class F consistency vs Holcim cone - Normo 4
y = 0.8676x - 241.71
R2
= 0.9582
100
125
150
175
200
225
250
275
400 420 440 460 480 500 520 540 560 580 600
Concrete flow - DIN (mm)
Holcim
flow
(mm)
F2 F3 F4 F5

12
Concrete mix design – Precast element (Example)
kg/m3 Density Volume (L/m3) Mortar volume
Sand/mortar ratio
(%)
w/c 0.35 -- --
1000-407 =
593
326/593 = 55%
Cement 400 3.14 127
Water 140 1 140
Sand [< 5
mm]
865 2.65 326
Coarse
aggregates
[>5 m]
1100 2.7 407
Total 1000L
Total 2505 kg/m3

13
Step 1 - Water demand - from 11:30 until 13:00
Mix 1 2 3
W/C 0.50 0.55 0.60
Cement
type
Group 1 Normo 4 – CEM I 42.5
Group 2 White cement Albaro – CEM I 52.5

14
Water demand – 10 & 45 min
0.55
0.56
0.57
0.58
0.59
0.6
0.61
0.62
0.63
0.64
0.65
10 min 45 min
W/C
Water
demand
(w/c)
CEM I 42.5
CEM I 52.5

15
Step 2 – Cement/admixture performance - PM session
Group 1 2
Cement type White cement Albaro – CEM I 52.
W/C 0.35
Superplastcizer
type
Sika 210 Glenium 51
Dosage (%) 1.2 1.5 2 0.4 0.45 0.5

16
Admixture compatibility with White cement – CEM I 52.5
W/C = 0.35 - Target flow: 200 mm
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
10 min 45 min
Superplasticizer
dosage
(%)
Sika 210
Glenium 51

18
Self-compacting concrete mix design – PM session
Mix design approach Robust Admixture
W/C 0.43 0.50
W/B 0.29 0.50
Water [kg/m3] 175 195
Cement – Normo 4 Siggenthal [kg/m3] 400 390
Fly ash – Hydrolent [kg/m3] 200 --
Superplasticizer – sika 210 [kg/m3] 8 13
VEA – welan gum [g/m3] -- 100
Sand [kg/m3]
0.2 – 0.5 mm 256 311
0.5 – 1 mm 304 370
1 – 2 mm 48 58
2 – 4 mm 192 235
Aggregate [kg/m3]
4 – 8 mm 295 320
8 – 16 mm 545 600

19
Mixing procedure
Admixture Robust
Step 1
Mix 1 min.
Coarse aggr.
+ sand
+ water
Coarse aggr.
+ sand
+ water
Step 2
Mix 3 min.
Add Cement Add Cement + fly ash
Break 1 min.
Step 3
Mix 5 min.
Add Sikament 210 (SP) Add Sikament 210 (SP)
Testing Measure Flow, U-box, V-funnel Measure Flow, U-box, V-funnel
Step 4
Mix 2 min.
Add Velan Gum (VEA)
Testing Measure Flow, U-box, V-funnel

20
Testing on fresh concrete
 Slump flow
 V-funnel
 U-box

21
Fresh concrete properties – Group 1
Mix design approach Robust Admixture Target
W/C 0.43 0.50
W/B 0.29 0.50
(+ 60 g Sika
210)
Without VEA With VEA
Slump flow (cm) 60 -- 67 60 -70 cm
V – funnel (sec) 14 -- 4.1 6 – 15 sec
U-box (cm)
>30 cm
(Rank 1)
--
>30 cm
(Rank 3)
> 30 cm

22
Fresh concrete properties – Group 2
Mix design approach Robust Admixture Target
W/C 0.43 0.50
W/B 0.29 0.50
(+ 78 g Sika
210)
Without VEA
With VEA +
2g
Slump flow (cm) 65 -- 66 60 -70 cm
V – funnel (sec) 10 -- 5 6 – 15 sec
U-box (cm)
>30 cm
(Rank 1)
--
>30 cm
(Rank 3)
> 30 cm

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