The Latest Innovation in Pipe & Culvert Repair Using Carbon FRP Patent Pending & Copyright QuakeWrap, Inc., 2009 Page 1 of 21 The Latest Innovation in Pipe & The Latest Innovation in Pipe & Culvert Repair using Carbon FRP Culvert Repair using Carbon FRP Mo Ehsani, Ph.D., P.E., S.E. Mo Ehsani, Ph.D., P.E., S.E. Professor of Civil Engineering Univ of Arizona and Professor of Civil Engineering Univ of Arizona and 1 Professor of Civil Engineering, Univ. of Arizona, and Professor of Civil Engineering, Univ. of Arizona, and President, QuakeWrap, Inc. President, QuakeWrap, Inc. Outline Outline What are FRPs? History & Background of FRP Pipe Types & Problems Repair of Pipes with FRP 2 Large Diameter Pipes ¾Wet Lay-up ¾Pre-Cured Laminates Repair of Small Diameter Pipes ¾Pre-Cured Laminates Q & A What is Fiber Reinforced What is Fiber Reinforced Polymer (FRP) Polymer (FRP) 3
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The Latest Innovation in Pipe & Culvert Repair Using Carbon FRP
The Latest Innovation in Pipe & The Latest Innovation in Pipe & Culvert Repair using Carbon FRPCulvert Repair using Carbon FRP
Mo Ehsani, Ph.D., P.E., S.E.Mo Ehsani, Ph.D., P.E., S.E.Professor of Civil Engineering Univ of Arizona andProfessor of Civil Engineering Univ of Arizona and
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Professor of Civil Engineering, Univ. of Arizona, andProfessor of Civil Engineering, Univ. of Arizona, andPresident, QuakeWrap, Inc.President, QuakeWrap, Inc.
OutlineOutlineWhat are FRPs?History & Background of FRPPipe Types & ProblemsRepair of Pipes with FRP
2
Large Diameter PipesWet Lay-upPre-Cured Laminates
Repair of Small Diameter PipesPre-Cured Laminates
Q & A
What is Fiber Reinforced What is Fiber Reinforced Polymer (FRP)Polymer (FRP)
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The Latest Innovation in Pipe & Culvert Repair Using Carbon FRP
σσ vs. vs. εε for Steel & Compositesfor Steel & Composites
s (k
si)
Steel
Glass FRPCarbon FRP
150
100
(MPa
)800
5
50Stre
ss
Strain0.01 0.02 0.03
0
Stre
ss
0
400
Advantages of Advantages of QuakeWrapQuakeWrap®®
High Tensile Strength (3-5 times stronger than Steel) Low Weight (no foundation adjustments required)Anisotropic (strength depends on fiber orientation)Corrosion Resistance & Acid ProtectionExcellent Fatigue Behavior
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Excellent Fatigue BehaviorSpeed of ConstructionVersatilityOdorlessNon-ToxicLow Cost
The Latest Innovation in Pipe & Culvert Repair Using Carbon FRP
“By assessing the actual condition of a pipeline using RFEC/TC one can gather the information required to start to predict the probability that
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p yindividual pipe sections might fail given present operating conditions.”
The decision can then be made to selective repair or replace pipe segments that are expected to fail. Repair of pipe segments require a structural solution to reinstate the hoop strength capability of the pipe.
The Latest Innovation in Pipe & Culvert Repair Using Carbon FRP
A Pipe within a PipeA Structural Pipe (Internal Pressure)Virtually no Loss in DiameterOne Size Fits All Pipe Diameters !!!
The Result is …The Result is …
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One Size Fits All Pipe Diameters !!!No Annular Space to GroutAmbient Cure; No Temperature or Steam RequiredSmooth Surface; Low Friction; Better Flow Characteristics
Structural Properties Structural Properties psi units psi units ((MPaMPa units)units)
PipeMedic™ PC4
PipeMedic™ PC2.2
PipeMedic™ PG2.2
InsituformRPP™
Tensile Strength
156,000 (1 075)
101,000(695)
62,000(430)
6,000(40)
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1. RPP = Reconstruction of Pressurized Piping2. While not listed here, carbon laminates are 20%-25% stronger
than their wet lay-up counterparts.
Strength (1,075) (695) (430) (40)Tensile Modulus
13,800,000 (95,145)
7,150,000 (49,300)
3,500,000 (24,130)
PipeMedicPipeMedic™™ Example Example Steel PipeDiameter: 96 inches (2.44 m)Pressure: 150 psi (10.34 bar)
Retrofit Solution: 2 layers of Unidirectional Carbon Fabric
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Wet Lay up Using PipeMedicTM
1 layer of glass One laminate!First layer of carbonSecond layer of carbon
Installation time reduced by 80% !!!
The Latest Innovation in Pipe & Culvert Repair Using Carbon FRP
Truly trenchless Truly trenchlessStrengthens pipe Strengthens pipeFits all pipe diameters Fits all pipe diametersFabric applied in layers Single multi-layer laminate
Wet Layup PipeMedic™
pp y g yAlign fiber orientation Already alignedRemove air bubbles No air bubblesSaturation inside pipe No saturationSamples tested after Samples tested beforeInstallation is complete installation beginsLonger time required Reduces time by upto 80%Experienced crew required Certified installers
OutlineOutlineWhat are FRPs?History & Background of FRPPipe Types & ProblemsRepair of Pipes with FRP
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Large Diameter PipesWet Lay-upPre-Cured Laminates
Repair of Small Diameter PipesPre-Cured Laminates
Q & A
Spot Repair using a PackerSpot Repair using a Packer
The Latest Innovation in Pipe & Culvert Repair Using Carbon FRP