ERS Route 5 Chickahominy Bridge - Virginia Department of ...ERS Route 5 Chickahominy Bridge March 4,...
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A partnership of the Virginia Department of Transportation and the University of Virginia since 1948 ERS Route 5 Chickahominy Bridge March 4, 2009 Celik Ozyildirim, Ph.D., P.E. Principal Research Scientist
Transcript of ERS Route 5 Chickahominy Bridge - Virginia Department of ...ERS Route 5 Chickahominy Bridge March 4,...
A partnership of the Virginia Department of Transportationand the University of Virginia since 1948
ERSRoute 5 Chickahominy Bridge
March 4, 2009Celik Ozyildirim, Ph.D., P.E. Principal Research Scientist
03/04/2009
Outline
• ERS• Pilot Projects• Chickahominy Bridge
– Trial batches– Control charts
03/04/2009
ERS - Goals
• To have long lasting concrete structures• Provide innovation• Ensure consistent uniform concrete• Pay based on the quality of concrete
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ERS
Includes• Prequalification
QC Plan by the Contractor applicable to preconstruction and during construction
• Mix design approval• Acceptance
03/04/2009
Differences in Specifications
PWLMinimumBasis of Pay
Contractor andVDOT
VDOTTesting
Performance Measures
PrescriptiveMix Design
ERSCurrentItem
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First Phase Pilot Projects
Salem: Route 11 over the New River and Norfolk Southern Railroad tracks near Radford University
Culpeper: Route 28 near Manassas
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Salem
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Salem Mix Proportions
0.45w/cm
1755Coarse aggregate
1101Fine aggregate
159Slag
159Fly ash Class F
318Cement Type I/II
Amount (lb/yd3)Material
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Salem Strength and Permeability
72391Permeability
3055016Strength
Std DevAverage (psi)
N=31
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Culpeper
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Second Phase Pilot Projects
• Structures in different districts• Route 624• Route 95• Chincoteague Bridge• Route 5 Chickahominy bridge
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Route 624 over Cat Point Creek
03/04/2009
Route 624 over Cat Point Creek
In the same mixture• Crushed stone and gravel.• Water reducer and retarding admixture
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Route 95 Widening Project
Curing Box with continuous recording
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Chincoteague Bridge Bascule Footing
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Chincoteague Bridge
• In A3 Mass Concrete minimum cementitious material content is 588 lb/yd3
• In this project used 539 lb/cy3 of cementitious material content with 30% Class F fly ash
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Rte 5 over Chickahominy
03/04/2009
Rte 5 over Chickahominy
Quality coarse aggregate did not meet #57
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Rte 5 over Chickahominy
Combined Aggregate Gradation: #57+#78+Sand
0
5
10
15
20
25
30
1 1/2 1 3/4 1/2 3/8 #4 #8 #16
#30
#50
#100
#200 Pan
Sieve Size
Perc
ent R
etai
ned
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Rte 5 over Chickahominy
Three trial batches with different cementitious material and w/cm
03/04/2009
Rte 5 over Chickahominy
Three trial batches with different cementitious material and w/cm
Coarse aggregate does not meet #57; however, combined aggregate is considered.
03/04/2009
Control Charts Fresh Concrete
Slump Results
01234567
1 2 3 4 5 6 7 8 9 10 11 12 13 14Test Number
Inch
es
Air Content
0
2
4
6
8
1 2 3 4 5 6 7 8 9 10 11 12 13 14Test Number
Air
Con
tent
Unit Weight
134
136138
140142
144
1 2 3 4 5 6 7 8 9 10 11 12 13 14Test Number
Uni
t Wei
ght
Temperature
0
20
40
60
80
100
1 2 3 4 5 6 7 8 9 10 11 12 13 14Test Number
Tem
pera
ture
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Control ChartsHardened Concrete
Compressive Strength (Avg)
0100020003000400050006000
1 2 3 4 5 6 7 8 9 10 11 12 13 14Test Number
psi (
Ave
rage
)
Coulombs (Avg)
200300400500600700800900
1000
1 2 3 4 5 6 7 8 9 10 11 12 13 14Test Number
Cou
lom
be (A
vg)
Compressive Strength Moving Average (psi)
41004200430044004500460047004800
1 2 3 4 5 6 7 8 9 10 11 12 1Test Number
psi (
Ave
rage
)
Coulombs Moving Average
200300400500600700800900
1000
1 2 3 4 5 6 7 8 9 10 11 12Test Number
Cou
lom
be (A
vg)
A partnership of the Virginia Department of Transportationand the University of Virginia since 1948
THANK YOUMarch 4, 2009Celik Ozyildirim, Ph.D., P.E. Principal Research Scientist
