Crack Sealing & All The Fun That Comes With It. Sealing & All The Fun That Comes With It. ... SD DOT...
Transcript of Crack Sealing & All The Fun That Comes With It. Sealing & All The Fun That Comes With It. ... SD DOT...
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Crack Sealing &All The Fun That Comes With It.
Presented by
Brett MeadorsHighway Improvement, Inc
Sioux Falls, S.D.South Dakota Asphalt Conference 2012
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Rout, Blow & Seal Blow & Seal is a waste of
TIME & MONEY
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What’s New??? ASTM 6690 Type II & IV ASTM 3405 & 3405 Low Modulous Name Change XLM
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$$$ COST $$$ Typical $3,000 / Mile FHWA: For Every $1 Spent on
Maintenance $4 Savings in return
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Do You Have a Program??? You should Pavement Maintenance – Is it really
that different than equipment/vehicle maintenance?
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Causes Water Penetration Water penetrates through the cracks in the pavement
and into the sub base. The base is then softened which leads to cracks working their way up to the surface, then to "alligatored" areas and eventually potholes.
Sunlight The second cause of pavement cracking is due to
oxidation. Since asphalt pavement is approximately 94% aggregate and only 6% asphalt oil, it is very susceptible to the elements. Sun, rain, heat and cold trigger the asphalt to oxidize, causing it to harden and shrink.
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Causes Continued Lack of Control Joints / Freeze-Thaw
Cycles Most asphalt surfaces, unlike concrete, do not
have control joints and thus cracks appear where the most stress is placed.
Subbase
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Why Crack Seal ???
• Prevent water penetration.• Prevent incompressibles.• Protects subbase.• Adds life to pavement.
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How to Crack Seal ??? Correctly – Sealant / Router / Cutters Do your homework Call me
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SD DOT Specified Method of Crack Sealing
1. Routing joint to ¾” x ¾” reservoir. 2. Blow joint clean with 125 cfm
compressed air.3. Install hot pour sealant meeting
ASTM D 6690 Type IV Modified specification.
4. 6” overband of crack with squeegee.
5. Install blotter material (If required).
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Routing vs. Blow & Seal
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FHWA/SHRP Report
6.5 year federal study. 61 different crack
treatments tested. 32 treatments failed. 4 crack repair sites. Conclusion: ¾” x ¾” rout
and seal best method.
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How Long Does It Last???
A typical Rout, Blow, And Seal should last between 5 to 7 Years.
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Traffic Control
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Routing
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Clean Joint with Compressed Air
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Install Sealant & Overband
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Install Blotter Material
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Goals of crack sealing program
1. Long term cost effective pavement maintenance.
2. Improves performance of other maintenance measures.
3. Takes money to save money
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QUESTIONS???
Thank YouFor further information or comments please contact:
Brett MeadorsHighway Improvement, Inc.
P.O. Box 1803 Sioux Falls, SD 57101
(605)310-7725