Glenium Concrete Pres
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ROLE OF ADMIXTURES IN READYMIX CONCRETE
Chemical Admixtures
ASTM C 494
EN 934 – 2
IS 9103:2003
Chemical Admixtures Type
Description
A
Water Reducing admixture (WRA)
B
Retarding Admixture
C
Accelerating Admixture
D
Water Reducing & Retarding Admixture
E
Water Reducing & Accelerating Admixture
F
High Range Water Reducing Admixture (HRWRA)
G
High Range Water Reducing & Retarding Admix
Slump flow [cm]
Main effect of plasticizing admixtures
1
with Plasticizer 2
without Plasticizer Water/Cement Ratio
1
Higher workability at constant w/c ratio
2
Increase of strength parameters through reduction of w/c ratio at constant slump flow
Types of concrete admixtures
Lignosulphonates – LS
Beta-Naphthalenesulphonate - Polycondensate – BNS
Melamine-Sulphonate-Poly-condensate – MFS
Poly Acrylates – PAC
Polycarboxylate Ethers - PCE
Traditional Plasticizers/Superplasticizers Mode of Action
Electrostatic Repulsion
BNS molecules
Volume of Admixtures
Innovation History of Water Reducer Technology
AE high water-reducing agent Super plasticizer [Glenium] Conventional AE waterreducing agent [Pozzolith] High water-reducing agent [Rheobuild]
1950
1960
1970
1980 Year
1990
2000
2010
PCE Molecule
complex and flexible molecules, comprising of main chain Side chains functional groups.
PCE Based - GLENIUM Molecules
Electrostatic and Steric Repulsion GLENIUM molecules
Glenium Concrete
High grades Low Grades SCC Precast
Glenium Concrete for Higher Grades Why higher grades? (M45 – M 60)
Early destripping Advantages in column size reduction Longer spans and thinner decks PT slabs – 30 MPa in 3 days
General Practice for Higher Grade
Use of Higher Cement contents Use of very low water /cement ratios Use of Expensive Mineral Admixtures
Phenomenal increase in costs Concrete very sensitive to changes in moisture content Extra cement content due to retention effect
Critical Areas
Use of higher cement content – Thermal Shrinkage Use of silica fume
– Risk of Plastic shrinkage
Use of low w/c ratio
– Higher dosage of SNF admixture – (retardation effect-plastic shrinkage)
Higher cost of concrete!
Hydration Reactions
Glenium Concrete
How does Glenium Work?
GLENIUMTM molecules
Improved Dispersion due to electrostatic and steric repulsion ….low w/cm
Glenium Concrete GLENIUM helps in
Excellent dispersion of binders Better Hydration Water reduction upto 40% Reduction in Cement content Lower risk to Thermal Shrinkage High early strengths Reduce/Eliminate SF Reasonably lower w/c ratios
Faster de-stripping possible Economical concrete Tolerant to changes in moisture content
Typical Glenium Mix – M 60 Mix with SF
Mix with Glenium
Cement
430
425
Flyash
80
150
Silica Fume
35
0
565
575
Total Aggregates
1782
1722
Water
158
161
Traditional Admix
1.8%
xxx
Glenium Range
XXX
1.2%
W/B Ratio
0.28
0.28
1 Day
19.02
18.30
3 Days
39.46
37.40
7 Days
58.47
58.2
28 Days
72.34
71.11
Nil
Nil
Binder
Depth of water penetration
Economical Glenium Concrete Rs./Kg
Mix with SF
Mix With Glenium
Cement
4.25
1828
1806
Flyash
1.0
80
150
Silica fume
30
1050
0
Total Aggregates
0.40
713
689
Water
0.08
11
13
Trad. Admixture
50
509
0
Glenium Range
160
0
1120
4191
3778
Material Cost/Cu.M
Cost Saving ~ Rs. 400/M3
Glenium Concrete for Lower Grades
Requirements in Lower Grade concrete Early age strengths
Reduction in cement Addition of Fly ash Lower dosage of admixtures Extended retention – 2 to 3 hrs Avoid retempering of Concrete Tolerance to water (10 – 15 Litres)
Glenium Concrete GLENIUM helps in
Excellent dispersion of binders Better Hydration Reduction in Cement content Water reduction
Early Strength gain Addition of Flyash
lower w/c ratios
Economical concrete Tolerant to changes in water content
Typical Glenium Mix – M 30 Traditional M 30
Glenium Concrete
Cement
280
220
Flyash
60
120
340
340
Total Aggregates
1842
1820
Water
162
152
Traditional Admix
1.0%
xxx
Glenium Range Admixture
XXX
0.6%
W/B Ratio
0.46
0.42
1 Day
8.30
7.8
3 Days
16 .23
18.40
7 Days
26.42
28.92
28 Days
35.32
38.40
Binder
Economical Glenium Concrete Rs./Kg
Traditional
Mix With Glenium
Cement
4.25
1190
935
Flyash
1.0
60
120
Total Aggregates
0.40
737
728
Water
0.08
13
12
Trad. Admixture
28
95
0
Glenium Range
130
0
265
2095
2060
Material Cost/Cu.M
Thank You!!
Chemical Admixtures
ASTM C 494
EN 934 – 2
IS 9103:2003
Chemical Admixtures Type
Description
A
Water Reducing admixture (WRA)
B
Retarding Admixture
C
Accelerating Admixture
D
Water Reducing & Retarding Admixture
E
Water Reducing & Accelerating Admixture
F
High Range Water Reducing Admixture (HRWRA)
G
High Range Water Reducing & Retarding Admix
Slump flow [cm]
Main effect of plasticizing admixtures
1
with Plasticizer 2
without Plasticizer Water/Cement Ratio
1
Higher workability at constant w/c ratio
2
Increase of strength parameters through reduction of w/c ratio at constant slump flow
Types of concrete admixtures
Lignosulphonates – LS
Beta-Naphthalenesulphonate - Polycondensate – BNS
Melamine-Sulphonate-Poly-condensate – MFS
Poly Acrylates – PAC
Polycarboxylate Ethers - PCE
Traditional Plasticizers/Superplasticizers Mode of Action
Electrostatic Repulsion
BNS molecules
Volume of Admixtures
Innovation History of Water Reducer Technology
AE high water-reducing agent Super plasticizer [Glenium] Conventional AE waterreducing agent [Pozzolith] High water-reducing agent [Rheobuild]
1950
1960
1970
1980 Year
1990
2000
2010
PCE Molecule
complex and flexible molecules, comprising of main chain Side chains functional groups.
PCE Based - GLENIUM Molecules
Electrostatic and Steric Repulsion GLENIUM molecules
Glenium Concrete
High grades Low Grades SCC Precast
Glenium Concrete for Higher Grades Why higher grades? (M45 – M 60)
Early destripping Advantages in column size reduction Longer spans and thinner decks PT slabs – 30 MPa in 3 days
General Practice for Higher Grade
Use of Higher Cement contents Use of very low water /cement ratios Use of Expensive Mineral Admixtures
Phenomenal increase in costs Concrete very sensitive to changes in moisture content Extra cement content due to retention effect
Critical Areas
Use of higher cement content – Thermal Shrinkage Use of silica fume
– Risk of Plastic shrinkage
Use of low w/c ratio
– Higher dosage of SNF admixture – (retardation effect-plastic shrinkage)
Higher cost of concrete!
Hydration Reactions
Glenium Concrete
How does Glenium Work?
GLENIUMTM molecules
Improved Dispersion due to electrostatic and steric repulsion ….low w/cm
Glenium Concrete GLENIUM helps in
Excellent dispersion of binders Better Hydration Water reduction upto 40% Reduction in Cement content Lower risk to Thermal Shrinkage High early strengths Reduce/Eliminate SF Reasonably lower w/c ratios
Faster de-stripping possible Economical concrete Tolerant to changes in moisture content
Typical Glenium Mix – M 60 Mix with SF
Mix with Glenium
Cement
430
425
Flyash
80
150
Silica Fume
35
0
565
575
Total Aggregates
1782
1722
Water
158
161
Traditional Admix
1.8%
xxx
Glenium Range
XXX
1.2%
W/B Ratio
0.28
0.28
1 Day
19.02
18.30
3 Days
39.46
37.40
7 Days
58.47
58.2
28 Days
72.34
71.11
Nil
Nil
Binder
Depth of water penetration
Economical Glenium Concrete Rs./Kg
Mix with SF
Mix With Glenium
Cement
4.25
1828
1806
Flyash
1.0
80
150
Silica fume
30
1050
0
Total Aggregates
0.40
713
689
Water
0.08
11
13
Trad. Admixture
50
509
0
Glenium Range
160
0
1120
4191
3778
Material Cost/Cu.M
Cost Saving ~ Rs. 400/M3
Glenium Concrete for Lower Grades
Requirements in Lower Grade concrete Early age strengths
Reduction in cement Addition of Fly ash Lower dosage of admixtures Extended retention – 2 to 3 hrs Avoid retempering of Concrete Tolerance to water (10 – 15 Litres)
Glenium Concrete GLENIUM helps in
Excellent dispersion of binders Better Hydration Reduction in Cement content Water reduction
Early Strength gain Addition of Flyash
lower w/c ratios
Economical concrete Tolerant to changes in water content
Typical Glenium Mix – M 30 Traditional M 30
Glenium Concrete
Cement
280
220
Flyash
60
120
340
340
Total Aggregates
1842
1820
Water
162
152
Traditional Admix
1.0%
xxx
Glenium Range Admixture
XXX
0.6%
W/B Ratio
0.46
0.42
1 Day
8.30
7.8
3 Days
16 .23
18.40
7 Days
26.42
28.92
28 Days
35.32
38.40
Binder
Economical Glenium Concrete Rs./Kg
Traditional
Mix With Glenium
Cement
4.25
1190
935
Flyash
1.0
60
120
Total Aggregates
0.40
737
728
Water
0.08
13
12
Trad. Admixture
28
95
0
Glenium Range
130
0
265
2095
2060
Material Cost/Cu.M
Thank You!!
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