Embed Size (px)
Citation preview
INFRASTRUCTURE&
UNBONDED POST-TENSIONING
(CASE STUDIES)
Neel Khosa
AMSYSCO, Inc.
2013 PTI Convention
2
OUTLINE
Copyright © 2013 AMSYSCO Inc.
Concrete Pavements vs. Asphalt Pavements
Applications for Unbonded Post-Tensioned Concrete
Case Studies with Unbonded Post-Tensioned Concrete
ASPHALT
Copyright © 2013 AMSYSCO Inc.
4
Copyright © 2013 AMSYSCO Inc.
Cheaper Initial Construction Cost
Faster Construction Schedule
“Softer” for Pedestrian Traffic
Better Traction for Vehicles
CONCRETE
Copyright © 2013 AMSYSCO Inc.
6
Copyright © 2013 AMSYSCO Inc.
Durability / Less Maintenance
Lower Life-Cycle Costs in High Traffic Roads
Light Color (Heat Island)
Not Oil-Dependent (Environment)
7
CONCRETE VS. ASPHALT ROAD
Copyright © 2013 AMSYSCO Inc.
CONCRETE ACTS MORE LIKE A BRIDGE OVER THE SUBGRADE.
LESS PRESSURE IS PLACED ON MATERIALS BELOW CONCRETE PAVEMENTS THAN ON ASPHALT PAVEMENTS.
8
Copyright © 2013 AMSYSCO Inc.
“Concrete pavements on average outlast asphalt pavements by 10-15 years before needing rehabilitation.”
American Concrete Pavement Association
9
NOISE VS. FUEL ECONOMY
Copyright © 2013 AMSYSCO Inc.
Decibel Max Decibel Min Inst. Fuel Economy
(mpg)
0
20
40
60
80
100
120
AsphaltConcrete
Source: http://www.youtube.com/watch?v=ryGugNQbOL0
APPLICATIONS FOR UNBONDED POST-TENSIONED CONCRETE
Copyright © 2013 AMSYSCO Inc.
AIRPORT RUNWAYS
Copyright © 2013 AMSYSCO Inc.
PARKING LOTS
Copyright © 2013 AMSYSCO Inc.
PEDESTRIAN BRIDGES
Copyright © 2013 AMSYSCO Inc.
ROADS, ROADS, ROADS
14
Copyright © 2013 AMSYSCO Inc.
CASE STUDIES WITH UNBONDED POST-TENSIONED CONCRETE
Wayzata Bay Roads
Buford Avenue Reconstruction
Emergency Vehicle Operator
Course
Univ. of MN STSS Pedestrian
Bridge
15
Copyright © 2013 AMSYSCO Inc.
Wayzata Bay Roads
16
Copyright © 2013 AMSYSCO Inc.
Excessive Settlement due to soil
PT Slab supported by 120’ piles
Designed for HS20-44 Loading
Encapsulated Post-Tensioning
Wayzata Bay Roads
17
Copyright © 2013 AMSYSCO Inc.
Section thru PT Slab
Wayzata Bay Roads
18
Copyright © 2013 AMSYSCO Inc.
Site Prep Membrane
Wayzata Bay Roads
19
Copyright © 2013 AMSYSCO Inc.
PT Install Pour
Wayzata Bay Roads
20
Copyright © 2013 AMSYSCO Inc.
Curing Open for Use!
Wayzata Bay Roads
21
Copyright © 2013 AMSYSCO Inc.
Wayzata Bay Roads
“Post-Tensioning was an effective way to reduce the concrete volume of the slab to 13 inches – which minimized the load to the supporting pipe piles.”
Ryan Bonniwell(Ericksen Roed & Associates)
22
Copyright © 2013 AMSYSCO Inc.
SLAB-ON-GROUND2013 Award of Excellence
Emergency Vehicle Operator Course (EVOC)
23
Copyright © 2013 AMSYSCO Inc.
60,000 square foot area
2 pours on consecutive days
0.5” Encapsulated Post-Tension
Made slippery for driver testing
EVOC
24
Copyright © 2013 AMSYSCO Inc.
Purpose of EVOC?
EVOC
Police, Fire, Military Vehicle Training
25
Copyright © 2013 AMSYSCO Inc.
Post-Tensioning Layout
EVOC
26
Copyright © 2013 AMSYSCO Inc.
1st Pour 2nd Pour
EVOC
27
Copyright © 2013 AMSYSCO Inc.
2nd Pour Finishing
EVOC
Copyright © 2013 AMSYSCO Inc.
Buford Ave. Reconstruction
29Buford Ave.
Copyright © 2013 AMSYSCO Inc.
PT Section = 102 Feet x 32 Feet
7” Concrete Thickness
40 Years of Expected Life
0.6” PT replaced RC Pavement
Copyright © 2013 AMSYSCO Inc.
PT CONCRETE
ASPHALTBuford Ave.
Copyright © 2013 AMSYSCO Inc.
Bus Traffic
Buford Ave.
32
Copyright © 2013 AMSYSCO Inc.
Hint: It involves the University of Minnesota.
Buford Ave.
What’s under the road ???
Copyright © 2013 AMSYSCO Inc.
Buford Ave.
Underground Student Lounge
34
Copyright © 2013 AMSYSCO Inc.
Buford Ave.
Copyright © 2013 AMSYSCO Inc.
Univ. of MN STSSPlaza and Pedestrian Bridge
36STSS Pedestrian
Bridge
Copyright © 2013 AMSYSCO Inc.
STSS Building is post-tensioned
Bridge = 220’ long x 20’ wide
6” slab with 1 longitudinal beam
Traffic = 25,000 students/day
Copyright © 2013 AMSYSCO Inc.
STSS Plaza/Ped
BRIDGE
PLAZA
STSS BUILDING
Copyright © 2013 AMSYSCO Inc.
STSS Plaza
Copyright © 2013 AMSYSCO Inc.
STSS Plaza
Copyright © 2013 AMSYSCO Inc.
STSS Pedestrian Bridge
Copyright © 2013 AMSYSCO Inc.
STSS Pedestrian Bridge
Copyright © 2013 AMSYSCO Inc.
Under the Bridge
Copyright © 2013 AMSYSCO Inc.
Unbonded Encapsulated Post-Tensioning is an effective alternative to RC or Asphalt for infrastructure projects.
RECAP
44
SOURCESPHOTOGRAPHS
Asphalt Road : http://www.llpelling.com
Concrete Road : http://www.urbanophile.com
Concrete vs. Asphalt : http://www.pavement.com
Airport Runways : http://paulswork.wordpress.com
Parking Lots : http://fatjacl.com
Pedestrian Bridges : http://mid-citysteel.com
Wayzata Bay Roads : Adolfson & Peterson Construction
EVOC : Brainerd Dispatch and Pawan Gupta
STSS Plaza : McGough Construction
Question Mark : http://m.inmagine.com
STRUCTURAL DRAWINGS
Wayzata Bay Roads : Ericksen Roed
EVOC : URS
Buford Ave. : SEH
Copyright © 2013 AMSYSCO Inc.
RELEVANT DATA
http://www.concreteisbetter.com/elib-factsheets.html
http://www.concreteisbetter.com/elib-casestudies.html
http://www.concreteisbetter.com/elib-research.html
http://www.concreteisbetter.com/vs.html
http://www.ltrc.lsu.edu/ltc_11/pdf/The%20Use%20of%20Life%20Cycle%20Assessment%20(LCA)%20to%20Evaluate%20Pavement%20Choice.pdf
http://www.ctscement.com/Specs2005/PDFdocs/TypeK_News2003.pdf
http://www.bolingconcrete.com/benefits-of-concrete.html
http://www.thomasconcrete.com/UserDyn/ThomasConcrete/pdf/concrete-processes.pdf
http://www.pavement.com/concrete_pavement/technical/fundamentals/Differences_Between_Concrete_and_Asphalt.asp
http://www.cement.org/PCA%20White%20Paper%203.pdf
http://www.artba.org/about/faqs-transportation-general-public/faqs/
http://www.dcnonl.com/article/id48193
http://www.pwmag.com/concrete/asphalt-vs--concrete--the-fight-to-pave-our-roads.aspx
http://www.pwmag.com/concrete/asphalt-vs--concrete--the-fight-to-pave-our-roads_2.aspx
