paving over crack filling everything you need to know ... · paving over crack filling &...
TRANSCRIPT
![Page 1: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/1.jpg)
Paving Over Crack Filling &
Everything You Need to Know About Tack Coats
Ohio Asphalt Paving ConferenceFawcett Center
February 6, 2008
![Page 2: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/2.jpg)
Paving Over Crack Filling
Sealants Reflecting through Overlays• Not a new phenomenon• Widespread Awareness in the 70’s
– Polymer Modified Mixes– Pavement Preservation Efforts
• Not all Overlays– Generally Rare – Several Compounding Issues
![Page 3: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/3.jpg)
Paving Over Crack Filling
Hot-Applied Rubberized Asphalt Sealant• Most Commonly Used • Cost-Effective • When Life Cycle Cost Is Considered (Per SHRP H106)
PavementPreservation
Efforts
![Page 4: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/4.jpg)
Paving Over Crack Filling
Sealer Reacts to HMA Overlay• Softens/Expands
• Softening Point 175 – 225o F
• Wick up into HMA
•Trapped moisture
• Causing Bumps
• Weak spots
![Page 5: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/5.jpg)
Paving Over Crack Filling
Crack Filler “wicks up” into the HMA
Existing Pavement
![Page 6: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/6.jpg)
Paving Over Crack Filling
![Page 7: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/7.jpg)
Paving Over Crack Filling
![Page 8: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/8.jpg)
Paving Over Crack Filling
![Page 9: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/9.jpg)
Paving Over Crack Filling
Compounding Issues
- HMA Mix Type - Crack Sealant Type - Roller Types - Application Procedures- Compaction Procedures - Age of Sealant
![Page 10: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/10.jpg)
Paving Over Crack Filling
Compounding Issues• HMA Mix Type
• High Temperature Modified mixes
• Thick Lifts vs. Thin Lifts
• Harsh, hard to Compact
![Page 11: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/11.jpg)
Paving Over Crack Filling
Compounding Issues• Roller Types
• Heavy Rollers
• Static vs. Vibratory
• Pneumatic Rollers vs. Steel Wheel
![Page 12: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/12.jpg)
Paving Over Crack Filling
Compounding Issues• Compaction Procedures
• Excessive Number of passes
• Static vs. Vibratory
![Page 13: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/13.jpg)
Paving Over Crack Filling
Compounding Issues• Sealant Type
• Higher Softening Temperature
• Cost vs. Benefit
• Wait more than One year
• Less than One Year
![Page 14: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/14.jpg)
Paving Over Crack Filling
Compounding Issues• Age of Sealant
• Age hardened
• Older than One year
• Less than One Year
• Route or Mill to Remove.
![Page 15: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/15.jpg)
Rotary Impact Router Vertical Spindle Router
RandomCrack Saw
Paving Over Crack Filling
![Page 16: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/16.jpg)
Paving Over Crack Filling
Milling to Remove Sealant
![Page 17: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/17.jpg)
Paving Over Crack Filling
Compounding Issues• Sealant Application Procedures
• Amount
• Configuration.
![Page 18: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/18.jpg)
Paving Over Crack Filling
Placement Configurations
Material
Crack
Flush Fill CappedMaterial
Crack
![Page 19: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/19.jpg)
Paving Over Crack Filling
Placement Configurations
Band-Aid with a Reservoir
Simple Band-Aid
Reservoir
Material
Crack
Band-Aid 1” 1”
1/8” Thick(typical)
Material
Crack
Band-Aid 1” 1”
1/8” Thick(typical)
![Page 20: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/20.jpg)
Paving Over Crack Filling
Recommended Placement Configurations
DeepReservoir-and-Recess
Standard Reservoir & Recess
.5”.5”
Material
Crack
Material
Reservoir
Recess¼”
BackerRod
Material
Reservoir
Crack
Recess¼”3/8”
![Page 21: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/21.jpg)
Paving Over Crack Filling
Evaluating the Potential
• Sources of Additional Information
• Pavement Management System
• Maintenance Records
•Test Strips
![Page 22: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/22.jpg)
Paving Over Crack Filling
New Technology
Warm-MixAsphalt
![Page 23: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/23.jpg)
Tack Coats
![Page 24: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/24.jpg)
Tack Coats
Key component of a quality HMA paving• Bonds to underlying layers• Achieves maximum pavement strength • It prevents delamination• Ensures long-term performance
![Page 25: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/25.jpg)
Tack Coats
Equipment• Well Maintained• Functioning Properly• Capable of maintaining Temperature & Pressure
• Slow setting asphalt emulsions SS-1h•Spraying temperature between 75° F and 130° F
![Page 26: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/26.jpg)
Tack Coats
![Page 27: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/27.jpg)
Tack Coats
![Page 28: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/28.jpg)
Pressure Distributor
Tack Coats
![Page 29: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/29.jpg)
Calibrate Distributor
Tack Coats
![Page 30: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/30.jpg)
Tack Coats
• Slow setting emulsion are more stable • Can be diluted in the field
– Carefully, by adding water to the emulsion – Adding the emulsion to water may cause the tack to break.
• The dilution rate should be 1:1• Dilution Allows Distributor
– To Shoot at a Higher Spread – Higher Pressure – With Better Control– 90% Uniform Coverage of the Surface
![Page 31: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/31.jpg)
![Page 32: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/32.jpg)
Heavy Tack Coat
![Page 33: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/33.jpg)
![Page 34: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/34.jpg)
Tack Coats
Typical Application RatesRate ∗
(gallons/sy)
Existing PavtCondition
Residual Undiluted Diluted(1:1)
.03 .05 .10
New Asphalt to to to .04 .07 .13
![Page 35: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/35.jpg)
Tack Coats
Typical Application RatesRate ∗
(gallons/sy)
Existing PavtCondition
Residual Undiluted Diluted(1:1)
.04 .07 .13
Oxidized Asphalt to to to
.06 .10 .20
![Page 36: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/36.jpg)
Tack Coats
Traffic should be kept off the tacked surface• Good practice
• Tack just far enough ahead • Sufficient time for the tack coat material to set• If the road surface must be open to traffic
•Use clean dry sand cover • Provides friction• Prevents pick-up• Typical rate is 4 to 8 lbs/sy.
• If the Surface gets dirty – Re-Tack•When in doubt – Re-Tack.
![Page 37: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/37.jpg)
Questions?
Paving Over Crack Filling &
Everything You Need to Know About Tack Coats
FPO Technical Bulletinswww.flexiblepavements.org
Asphalt Institute MS-19www.asphaltinstitute.org
![Page 38: Paving Over Crack Filling Everything You Need to Know ... · Paving Over Crack Filling & Everything You Need to Know About Tack Coats Ohio Asphalt Paving Conference Fawcett Center](https://reader031.vdocument.in/reader031/viewer/2022022118/5ce6097488c993fb6e8c36eb/html5/thumbnails/38.jpg)
Thank You!
Paving Over Crack Filling &
Everything You Need to Know About Tack Coats
Wayne JonesRegional EngineerAsphalt Institute