rheological properties of fresh … properties of fresh mortars and concretes containing high...
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![Page 1: RHEOLOGICAL PROPERTIES OF FRESH … PROPERTIES OF FRESH MORTARS AND CONCRETES CONTAINING HIGH CALCIUM FLY ASH Jacek Gołaszewski, Tomasz Ponikiewski The Silesian University of Technology,](https://reader031.vdocuments.net/reader031/viewer/2022022512/5ae4652c7f8b9a0d7d8ef37a/html5/thumbnails/1.jpg)
RHEOLOGICAL PROPERTIES OF FRESH MORTARS AND CONCRETES
CONTAINING HIGH CALCIUM FLY ASH
Jacek Gołaszewski, Tomasz PonikiewskiThe Silesian University of Technology,
Department of Building Materials and Processes Engineering Akademicka 5, 44-100 Gliwice, Poland
20 Kolloquium „Rheologishe Messungen an mineralischen Baustoffen, 1-2.03.2011
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ASTM C618-93 categorizes natural pozzlans and fly ashes into the following three categories:
TYPES AND PROPERTIES OF FLY ASH
ASTM C618-93 specification (1993) for „Fly Ash and Raw or Calcined Natural Pozzolan for use as Mineral Admixture in Portland Cement Concrete”
Class N: Raw or calcined natural pozzolans such as some diatomaceous earths, opaline chert and shale, stuffs, volcanic ashes and pumice are included in this category.
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ASTM C618-93 categorizes natural pozzlans and fly ashes into the following three categories:
TYPES AND PROPERTIES OF FLY ASH
ASTM C618-93 specification (1993) for „Fly Ash and Raw or Calcined Natural Pozzolan for use as Mineral Admixture in Portland Cement Concrete”
Class N: Raw or calcined natural pozzolans such as some diatomaceous earths, opaline chert and shale, stuffs, volcanic ashes and pumice are included in this category.
Class F: Fly ash normally produced from burning anthracite
or bituminous coal falls in this category.This class of fly ash exhibits pozzolanic property but rarely, if any, self hardening property.
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ASTM C618-93 categorizes natural pozzlans and fly ashes into the following three categories:
TYPES AND PROPERTIES OF FLY ASH
ASTM C618-93 specification (1993) for „Fly Ash and Raw or Calcined Natural Pozzolan for use as Mineral Admixture in Portland Cement Concrete”
Class C: Fly ash normally produced from lignite or sub-bituminous coal is the only material included in this category. This class of fly ash has both pozzolanic and varying degree of self cementitious properties.
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COMPOSITION AND CEMENT PRODUCTION METHOD
Component Mixed components method
Joint-grinding componentsmethod
CEM II/A-W
CEM II/B-W
CEM IV/B-W
CEM II/A-W
CEM II/B-W
CEM IV/B-W
Cement 85 70 50 - - -
Portland cement clinkier - - - 81,1 67,7 49,2
High-lime fly ash (Class C) 15 30 50 14,3 29,0 49,2
Siliceous fly ash (Class F) - - - - - -
Gypsum - - - 4,6 3,3 1,6
Component Mixed components method
Joint-grinding componentsmethod
CEM II/A-M (V-W)
CEM II/B-M (V-W)
CEM IV/B (V-W)
CEM II/A-M (V-W)
CEM II/B-M (V-W)
CEM IV/B(V-W)
Cement - - - 85 70 50
Portland cement clinkier 80,5 66,7 48,1 - - -
High-lime fly ash (Class C) 7,1 14,3 24,0 7,5 15 25
Siliceous fly ash (Class F) 7,1 14,3 24,0 7,5 15 25
Gypsum 5,3 4,7 3,8 - - -
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COMPOSITION AND CEMENT PRODUCTION METHOD
Component Mixed components method
Joint-grinding componentsmethod
CEM II/A-W
CEM II/B-W
CEM IV/B-W
CEM II/A-W
CEM II/B-W
CEM IV/B-W
Cement 85 70 50 - - -
Portland cement clinkier - - - 81,1 67,7 49,2
High-lime fly ash (Class C) 15 30 50 14,3 29,0 49,2
Siliceous fly ash (Class F) - - - - - -
Gypsum - - - 4,6 3,3 1,6
Component Mixed components method
Joint-grinding componentsmethod
CEM II/A-M (V-W)
CEM II/B-M (V-W)
CEM IV/B (V-W)
CEM II/A-M (V-W)
CEM II/B-M (V-W)
CEM IV/B(V-W)
Cement - - - 85 70 50
Portland cement clinkier 80,5 66,7 48,1 - - -
High-lime fly ash (Class C) 7,1 14,3 24,0 7,5 15 25
Siliceous fly ash (Class F) 7,1 14,3 24,0 7,5 15 25
Gypsum 5,3 4,7 3,8 - - -
Fly ash Portland cementFly ash Portland cementPortland-
pozzolan cement
Multicomponent Portland cementMulticomponent
Portland cementPortland-pozzolan cement
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PHYSICAL PROPERTIES OF FLY ASH class C
Fly ash C Density[g/cm3]
Fineness – rest on sieve 45 µm [%]
Blaine specific surface, [cm2/g]
Mass volume, [kg/m3]
Batch A
AWG Without grinding 2,62 38,0 2 860 -
AG10 Grinding 10 min 2,77 23,0 3 500 -
AG20 Grinding 28 min 2,75 10,5 3 870 -
Batch B
BWG Without grinding 2,58 35,4 4 400 750
BG15 Grinding 15 min 2,70 13,3 6 510 -
Batch C
CWG Without grinding 2,64 55,6 1900 1060
CG20 Grinding 20 min 2,71 20,0 4060 -
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MEASURING PROCEDURE AND THE ROTARY RHEOMETER
Component Mass [g]Cement 450Water 247,5Standard sand 1 350w/c 0,55
The rheological parameters
Mortars according to PN-EN 196-1
The Admixtures effects according to PN-EN 480
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MEASURING PROCEDURE AND THE ROTARY RHEOMETER
0 20 40 60 80 100 120 140
0
20
40
60
80
100f(x) = -1,#NANxR² = -1,#NAN
N [obr/min]
M [
Nm
m]
g = 44,13 [Nmm]h = 0,13 [Nmmmin]r = 0,975
Time, min
Tu
rn,
1/m
in
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INFLUENCE OF HIGH - LIME FLY ASH AMOUNT
Time, min
Time, min
Yie
ld v
alu
e g
, Nm
m
Pla
stic
vis
cosi
ty h
, Nm
ms
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INFLUENCE OF 10% HIGH - LIME FLY ASH KIND
Time, min
Pla
stic
vis
cosi
ty h
, Nm
ms
Yie
ld v
alu
e g
, Nm
m
Time, min
CEM I
Batch A
Batch B
Batch C
CEM I
Batch A
Batch B
Batch C
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INFLUENCE OF GRINDING 10% FLY ASH CY
ield
val
ue
g, N
mm
Time, min
0
AWG
G20
Pla
stic
vis
cosi
ty h
, Nm
ms
Time, min
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INFLUENCE OF 20% HIGH - LIME FLY ASH AND PLASTICIZER
Yie
ld v
alu
e g
, Nm
m
Admixture, % mass of C
Pla
stic
vis
cosi
ty h
, Nm
ms
Admixture, % mass of C
CEM I
AWG
AG10
AG20
CEM I
AWG
AG10
AG20
Joint-grinding components
method
Mixed components
method
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INFLUENCE OF CEMENT WITH HIGH - LIME FLY ASH Y
ield
val
ue
g, N
mm
Time, min Time, minPla
stic
vis
cosi
ty h
, Nm
ms
Joint-grinding Blast Furnace Slag Cement CEM II and Portland –Pozzolan cement CEM IV with fly ash Camount of fly ash – 15, 30, 50%
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INFLUENCE OF CEMENT WITH HIGH - LIME FLY ASH Y
ield
val
ue
g, N
mm
Time, min Time, minPla
stic
vis
cosi
ty h
, Nm
ms
Joint-grinding Blast Furnace Slag Cement CEM II and Multicomponent Portland cement CEM V
CEM II B (S-W) 20%S (slag), 10%W (fly ash C)
CEM II B (S-W) 20%W (fly ash C), 10%S (slag)
CEM V/A (S-W)
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INFLUENCE OF CEMENT WITH HIGH - LIME FLY ASH Y
ield
val
ue
g, N
mm
Time, min Time, minPla
stic
vis
cosi
ty h
, Nm
ms
Joint-grinding Blast Furnace Slag Cement CEM II and Portland –Pozzolan cement CEM IV with fly ashes
Siliceous fly ash (Class F) : High-lime fly ash (Class C) = (1:1)
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INFLUENCE OF CEMENT WITH HIGH - LIME FLY ASH Y
ield
val
ue
g, N
mm
Time, min Time, min
Joint-grinding Limestone Portland cement CEM II/B (LL-W)
LL – grinding limestone, W – fly ash C ; (1:1)
Pla
stic
vis
cosi
ty h
, Nm
ms
CEM I
CEM II/B(LL-W)
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ADMIXTURE EFFICIENCY CORRELATION Y
ield
val
ue
g, N
mm
Time, minPla
stic
vis
cosi
ty h
, Nm
ms
Admixture, % mass of C Admixture, % mass of C
Joint-grinding Blast Furnace Slag Cement CEM II and Portland –Pozzolan cement CEM IV with fly ashes
Siliceous fly ash (Class F) : High-lime fly ash (Class C) = (1:1)
Mixed components
method
Joint-grinding components
method
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MIXED CEMENT RHEOLOGICAL PROPERTIES
0
10
20
30
40
50
60
70
80
90
100
0 20 40 60 80 100Czas, [min]
Gran
ica p
łyni
ęcia
[g, N
mm
] CEM I
CEM II/A-W
CEM II/B-W
CEM IV/B-W
CEM II/A(V-W)
CEM II/B(V-W)
CEM IV/B(V-W)
CEM II/B(S-W)
CEM II/B(LL-W)
Yie
ld v
alu
e g
, Nm
m
Time, min
Portland-pozzolan cement
Fly ash Portland cement
Fly ash Portland cement
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JOINT-GRINDING CEMENT RHEOLOGICAL PROPERTIES
0
10
20
30
40
50
60
70
80
90
100
0 20 40 60 80 100Czas, [min]
Gran
ica
płyn
ięci
a [g
, Nm
m]
CEM I
CEM II/A-W
CEM II/B-W
CEM IV/B-W
CEM II/A(V-W)
CEM II/B(V-W)
CEM IV/B(V-W)
Time, min
Yie
ld v
alu
e g
, Nm
mPortland-
pozzolan cementFly ash Portland
cement
Fly ash Portland cement
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The rheological properties of cements with high-lime fly ash from workability point of view are worsen
The workability of cement with milling high-lime fly ash are better
CONCLUSIONS - 1
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Adding high-lime fly ash to cement, the CEM I workability received,especially for multicomponent cements
CONCLUSIONS - 2
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Worsen efficiency admixtures in high-lime fly ash presence are wasn’t found
CONCLUSIONS - 3
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THANK YOU FOR ATTENTION
Jacek Gołaszewski, Tomasz PonikiewskiThe Silesian University of Technology,
Department of Building Materials and Processes Engineering Akademicka 5, 44-100 Gliwice, Poland
20 Kolloquium „Rheologishe Messungen an mineralischen Baustoffen, 1-2.03.2011