Asphalt Rubber Seal Coats

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Asphalt Rubber Seal Coats
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How many cracks can you fill in one day?
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Is there a better way to take care of these
cracks?
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A seal coat alone will not do the job with
monster cracks!
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Asphalt Rubber Blend Site
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Distressed Surface
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Asphalt Rubber Binder Application
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Pre-Coated Aggregate Application
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Longitudinal Joint Overlap
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Rolling
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Sweeping Loose Aggregate
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Finished Surface
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Fog Seal Application
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Comparison
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The difference AR Seal Coat makes
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A good candidate for AR Seal Coat
Lots of cracks, but structurally sound.
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Texas Experience with AR Seal Coat
First use was in 1976 in Bryan and El Paso
districts Between 1976 and 1981, 850 miles of
AR seal coat was placed By 1990,
2,000 lane miles of AR Seal Coat was placed
More than 20 districts have placed AR Seal Coat
since 1976 in 70 counties
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Seal Coat - US 90, near Big Bend National Park
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US 90, crack disappearing in 10 year old Seal Coat
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Eight year old Seal Coat
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Seal Coat on IH-10 near Van Horn
Five years old
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Seal Coat on IH-10 near Van Horn
Five years old
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Not all AR Seal Coats Turned out good
Grade 4 Seal Coat
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Another bleeding Seal Coat
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Smaller grade 4 Aggregate will sink into the AR
Binder
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Performance of AR Seal Coat
Experience has mostly been satisfactory Good
construction practices are a must! - Clean or
pre-coated aggregate - Chip spreader staying
close to distributor - Adequate curing of AR -
Correct binder shot rate and aggregate rate
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Performance of AR Seal Coat
Shot rate must correspond to aggregate top
size - Grade 3 vs.. Grade 4 aggregate -
Earlier problems with flushing were most
likely due to aggregate size