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Bridge Decks -- New Construction and
Overlays
(Fly Ash and Silica Fume Combination)
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Project:
Bridge Deck Construction New York State DOT High-Performance Concrete
Requirements:
Resist chloride ion penetrationMinimize cracking
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Concrete Mixture:
Portland cement 500 lb/yd3
Fly ash 135 lb/yd3
Silica fume 40 lb/yd3
w/cm 0.40Slump 3-4 inchesAir 6.5 %Wet cure 7 days
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Concrete Performance:
“Results indicated that Class HP decks performed better than previously specified concrete in resisting both longitudinal and transverse cracking.”
Rapid chloride permeability: < 1,600 coulombs
Compressive strength,28 days: > 5,400 psi
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Project:
Requirements:
Resist chloride ion penetrationMinimize cracking
Bridge Deck ConstructionNew York State DOT High-Performance Concrete
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Concrete Mixture:
Portland cement 300 kg/m3
Fly ash 80 kg/m3
Silica fume 25 kg/m3
w/cm 0.40Slump 75-100 mmAir 6.5 %Wet cure 7 days
SI
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Concrete Performance:
SI
Rapid chloride permeability: < 1,600 coulombs
Compressive strength,28 days: > 37 MPa
“Results indicated that Class HP decks performed better than previously specified concrete in resisting both longitudinal and transverse cracking.”
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Bridge Deck Overlay
(High Silica Fume Content)
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Project:
Bridge Deck Overlay, Ohio DOTBeverly, Ohio
Requirements:
Resist chloride ion penetration4,500 psi at 28 daysRCP < 1,000 coulombs
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Concrete Mixture:
Portland cement, Type I 700 lb/yd3
Silica fume 70 lb/yd3
w/cm 0.36Slump 4-8 in.Air 6-10%HRWRA 20 fl oz/cwtWRA, Type D 3 fl oz/cwt
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Concrete Performance:
Rapid chloride permeability 600 coulombs
Compressive strength,28 days 7,000 psi
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Project:
Bridge Deck Overlay, Ohio DOTBeverly, Ohio
Requirements:
Resist chloride ion penetration31 MPa at 28 daysRCP < 1,000 coulombs
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Concrete Mixture:
Portland cement, Type I 415 kg/m3
Silica fume 41.5 kg/m3
w/cm 0.36Slump 100-200 mmAir 6-10%HRWRA 1.3L/100 kgWRA, Type D 165 ml/100 kg
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Concrete Performance:
Rapid chloride permeability 600 coulombs
Compressive strength,28 days 48 MPa
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Parking Structure
![Page 27: FA&SF-Applications- Bridge Decks New Construction&Overlays](https://reader030.vdocuments.net/reader030/viewer/2022032516/563dba46550346aa9aa431b5/html5/thumbnails/27.jpg)
Project:Parking StructureGeneral Mitchell AirportMilwaukee, Wisconsin
Requirements:
Resist chloride ion penetration2,000 psi at 36 hours5,700 psi at 56 days
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Concrete Mixture:
Portland cement, Type I 565 lb/yd3
Fly ash, Class C 100 lb/yd3
Silica fume 39 lb/yd3
w/cm 0.35WRA 12 fl oz/yd3
Slump, maximum 9 in.Additional WRA and HRWRA in SF slurry
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Concrete Performance:
Compressive strength,36 hours: > 2,000 psi
Cores taken at 2 - 10 months averaged < 1,000 coulombs
Slump used: 6 - 7.5 in.
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Project:
Parking StructureGeneral Mitchell AirportMilwaukee, Wisconsin
Requirements:
Resist chloride ion penetration14 MPa at 36 hours40 MPa at 56 days
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Concrete Mixture:
Portland cement, Type I 335 kg/m3
Fly ash, Class C 60 kg/m3
Silica fume 17 kg/m3
w/cm 0.35WRA 440 mL/m3
Slump, maximum 230 mmAdditional WRA and HRWRA in SF slurry
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Concrete Performance:
Compressive strength,36 hours > 14 MPa
Cores taken at 2 - 10 months averaged < 1,000 coulombs
Slump used: 150- 90 mm
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High-Rise Columns
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Project:
Key Bank TowerCleveland, Ohio
Requirements:
High ultimate strength, > 12,000 psiHigh modulus, > 6,800,000 psiPumpable, 57 stories
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Concrete Mixture:
Portland cement, Type I 685 lb/yd3
GGBFS 285 lb/yd3
Silica fume 80 lb/yd3
w/cm 0.24Slump, minimum 10 in. HRWRA 30-50 fl oz/cwtWRA, Type A 4 fl oz/cwt
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Concrete Performance:
Modulus > 7,000,000 psi
Compressive strength,28 days > 14,000 psi56 days > 15,000 psi
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Project:
Key Bank TowerCleveland, Ohio
Requirements:
High ultimate strength, > 83 MPaHigh modulus, > 47 GPaPumpable, 57 stories
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Concrete Mixture:
Portland cement, Type I 406 kg/m3
GGBFS 169 kg/m3
Silica fume 47 kg/m3
w/cm 0.24Slump, minimum 250 mm HRWRA 2.0-3.3 L/100 kgWRA, Type A 260 mL/100 kg
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Concrete Performance:
Modulus > 48 GPa
Compressive strength,28 days > 97 MPa56 days > 103 MPa
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HPC Bridge
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Project:
I-25 and Yale Bridge, Colorado DOTDenver, Colorado
Requirements:
Reduced number of spans with shallow superstructure depthCompressive strength: 10,000 psi
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Concrete Mixture:
Portland cement, Type I 730 lb/yd3
Silica fume 35 lb/yd3
w/cm 0.29HRWRA 44-131 fl oz/yd3
WRA 15-58 fl oz/yd3
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Project:
I-25 and Yale Bridge, Colorado DOTDenver, Colorado
Requirements:
Reduced number of spans with shallow substructure depth Compressive strength: 69 MPa
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Concrete Mixture:
Portland cement, Type I 433 kg/m3
Silica fume 21 kg/m3
w/cm 0.29HRWRA 1.7-5.1 L/m3
WRA 0.6-2.2 L/m3
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Shotcrete Rehabilitation
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Project:
Seismic RetrofitLittlerock Dam, California
Requirements:
Provide adequate seismic stability for maximum credible earthquakeCompressive strength of 6,000 psi at 28 days in a 4-in. thick overlay
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Concrete Mixture:
Portland cement, Type I 682 lb/yd3
Silica fume 70 lb/yd3
Steel fibers 100 lb/yd3
w/cm 0.45Slump 2-4 in.
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Concrete Performance:
Compressive strength, cores,> 21 days, average 7,300 psi
Pulloff testing of cores satisfied project requirements of 150 psi
Average shotcrete thickness: 4.7 in.
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Project:
Seismic RetrofitLittlerock Dam, California
Requirements:
Provide adequate seismic stability for maximum credible earthquakeCompressive strength of 41 MPa at 28 days in a 100-mm thick overlay
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Concrete Mixture:
Portland cement, Type I 405 kg/m3
Silica fume 41 kg/m3
Steel fibers 60 kg/m3
w/cm 0.45Slump 50 - 100 mm
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Concrete Performance:
Compressive strength, cores,> 28 days, average > 50 MPa
Pulloff testing of cores satisfied project requirements of 1.0 MPa
Average shotcrete thickness: 119 mm
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HPC Constructability
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Project:
Canister Storage BuildingHanford Nuclear Site, WA
Requirements:
Ease of placementTemperature control of mass concreteHigh early strength for strippingHigh durability
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Concrete Mixture:
Portland cement, Type I 391 lb/yd3
Fly ash, Class F 150 lb/yd3
Silica fume 60 lb/yd3
w/cm 0.37Slump 8 in.HRWRA 150 fl oz/yd3
Mid-range WRA 60 fl oz/yd3
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Concrete Performance:
Concrete temperature, as delivered < 70 deg Fin place < 100 deg F
Compressive strength,28 days > 6,300 psi 90 days > 7,500 psi
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Concrete Mixture:
Portland cement, Type I 232 kg/m3
Fly ash, Class F 89 kg/m3
Silica fume 36 kg/m3
w/cm 0.37Slump 200 mmHRWRA 5.8 L/m3
Mid-range WRA 2.3 L/m3
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Concrete Performance:
Concrete temperature, as delivered < 21 deg Cin place < 38 deg C
Compressive strength,28 days > 43 MPa90 days > 52 MPa
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