Roadware MICRODOWELING Technology Hybrid Urethane Concrete Repair.
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Transcript of Roadware MICRODOWELING Technology Hybrid Urethane Concrete Repair.
Roadware MICRODOWELING Technology
Hybrid Urethane Concrete Repair
Roadware History
• Established 1991 in Minnesota• Instrumental in Providing
Performance Based High-speed Concrete Repair Products
• Corporately Over 50 Years Product Development and Field Application In: – Highway– Industrial– Commercial
What is MICRODOWELING?
Technical Data Summary
• Hardness @ 72F 72D• Compressive Strength (w/sand)
4500psi• Elongation: 6%• Tensil Strength
4475psi• Bond Strength, Cal-551
1100psi• Viscosity (at application) 9 cps• V.O.C. (Mixed): 5.5 g/l• Solids: 98%• Cured Color (not exposed to sunlight) Gray
Technical Data Summary
• Hardness @ 72F 72D• Compressive Strength (w/sand)
4500psi• Elongation: 6%• Tensil Strength
4475psi• Bond Strength, Cal-551
1100psi• Viscosity (at application) 9 cps• V.O.C. (Mixed): 5.5 g/l• Solids: 98%• Cured Color (not exposed to sunlight) Gray
Surface Tension
• A measurement of the ability of a liquid to overcome its own internal friction and penetrate into a material like concrete.
Surface Tension
• Roadware 10 Minute Concrete Mender™ has a surface tension three times less than water.
Surface Tension
Fluid Surface Tension (N/m)Water at 20°C 0.0729
Ethanol 0.0223
Benzene 0.0289
Glycerin 0.0634
Mender Part A 0.026
Mender Part B 0.026
Mender 30-40 sec after mixing 0.026
Viscosity of Concrete Mender
(Time zero = time of ejection from nozzle)
Viscosity of Concrete Mender
(Time zero = time of ejection from nozzle)
Why it Works
• Superior Bond Strength• Ease of Application• Shrinkage• Modulus of Elasticity
Superior Bond Strength
• Mechanical Interlock with Microstructure of the Substrate– Measured with Scanning Electron
Microscope•Concrete Beam Fractured•Realigned with 1/8” Gap•Mender Applied•Specimen Was Sawed to Isolate Small
Samples
Superior Bond Strength
Superior Bond Strength
Why it Works
• Superior Bond Strength• Ease of Application• Shrinkage• Modulus of Elasticity
Ease of Application
• Viscosity– Related to The Ease of Which
Individual Molecules of the Liquid Can Move With Respect to Each Other
– Measured As a Function of Time•Brookfield Viscometer
Ease of Application
(Time zero = time of ejection from nozzle)
Ease of Application
• Concrete Mender Easily Wetted the Surface of Concrete– Mender Is Drawn Into the Concrete
Pore Structure by Capillary Tension
– Significant Penetration Occurs Within Minutes of Contact.
Ease of Application
Liquid Viscosity at 25C (cP)
Methanol 0.55
Benzene 0.65
Water 1.0
Ethanol 1.2
Concrete Mender 9.0
Ethylene Glycol 16
Glycerin 1490
Why it Works
• Superior Bond Strength• Ease of Application• Shrinkage• Modulus of Elasticity
Shrinkage
• International Concrete Repair Institute (ICRI) – Guideline No. 03733
• Shrinkage of 0.05% Is Considered “Low”
Shrinkage
• 0.10% Between 1 Hour and 7 Days • 0.05% Between 2 Hours and 7 Days
Test Was Completed Without SandAdding Sand Will Proportionately
Reduce Overall Shrinkage
Shrinkage
Why it Works
• Superior Bond Strength• Ease of Application• Shrinkage• Modulus of Elasticity
Modulus of Elasticity
• 3-point Beam Deflection Test– Tested to Fracture– Nearly Linear Load-Deflection Until
Fracture– Samples Fractured in a Brittle
Manner
Modulus of Elasticity
SampleModulus of Elasticitypsi (Mpa)
Modulus of Rupture psi (Mpa)
Neat Concrete Mender 137,000 (944) 3450 (23.8)
Concrete Mender w/ sand (54% vol% sand)
739,000 (5100) 3990 (27.5)
Concrete Mender: Summary
• High Quality Bond Achieved• Low Viscosity • Low Surface Tension• Shrinkage Is Low
Concrete Mender: Conclusion
Repairing Cracks With Concrete Mender Largely Restores the Structural Performance of the
Original Concrete
Roadware MICRODOWELING Technology
Concrete Mender Job Pics
Repairs - Parking Decks
Cracks in parking structures and bridge decks can be repaired without destructive cutting and grinding. Only a light scoring with a diamond blade grinder is used to clean out the crack. A wire wheel grinder will work too.
Repairs - Parking Decks
Roadware 10 Minute Concrete Mender™ is flooded deep into the crack and self-injects into the concrete like water into a sponge.
Repairs - Parking Decks
Roadware 10 Minute Concrete Mender™ is flooded deep into the crack and self-injects into the concrete like water into a sponge.Silica sand is added to the surface and excess material is wiped away with a trowel or even a piece of cardboard. The brushed finish is retained. The repair is fully traffic ready in 10 minutes.
Repairs - Parking Decks
A core sample of the concrete reveals the level of free penetration of 10 Minute Concrete Mender™ when photographed under filtered UV light.
Job Pics
Crack Repair Movie
QuickTime™ and aSorenson Video 3 decompressorare needed to see this picture.
Job Pics
Crack is Identified Scored and Cleaned out
Mender and Sand is Added
Job Pics
Crack Being Repaired at Full Depth, Sand Is Added to Stop
Sinkers
Additional Material Is Added to Fill the
Crack Up
Excess Material is Troweled and
Scraped
Job Pics
After 10 Min. The concrete is ready. A grinding stone is used to blend the
repair
Mender Blender can be added to
cover the repaired slab
Completed Repair
Roadware MICRODOWELING Technology
Hybrid Urethane Concrete Repair