Presentation by Pascal Mascarenhas of Vulcan Materials on Reclaimed Asphalt Pavement delivered at the CalAPA Fall Conference held Oct. 24, 2013 in Sacramento, Calif.

1. HIGH RAP % IN HMA
CALAPA FALL CONFERENCE
SACRAMENTO
OCTOBER 24, 2013
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3. CITY OF LOS ANGELES
6500 Miles of improved roads
 5800 Miles – Asphalt Concrete
 Annual Resurfacing budget of $45
million.

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5. CURRENT % RAP ALLOWED

Caltrans – HMA – up to 15%
– Superpave – 25% +/-1

Green Book – Section 203-6 – up to 20%
 Allows >20% with additional testing and data

City of LA Contract – 50% RAP
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6. WHY RECYCLE?
Landfill shortage.
 August 11,1987 City order
prohibiting the landfilling of road
materials.
 Beneficial Use
 Excellent performance

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8. CYCLEAN
The process used microwave
technology to produce HMA at up to
135 tons/Hr
 Plant would consume over 200,000
tons of City RAP in 1992 saving the
city $1.5 M in raw material and
disposal cost.

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9. CITY OF LOS ANGELES
Uses own equipment and personnel
to mill pavements for profiling and
grind-out procedures
 Millings transported to two locations
for stockpiling
 Contract requires the use of COLA
millings.

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11. MIX DESIGN PROCESS
Extensive profiling of RAP.
 Several samples have to be tested.
 Extraction and recovery of individual
samples.
 PG grading of RAP - +PG 82
 Blend to PG 64 -10

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12. Vulcan Los Angeles Regional Lab
Viscosity Testing
Extraction/Recovery
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14. Recycling Agents
(ASTM D4552)
RA1
Viscosity @
60C (cSt)
50-175
RA5
176-900
RA25
RA75
RA250
RA500
901- 45014500 12500
1250137500
3750160,000
218
218
218
218
218
218
Saturates, %,
Minimum
30
30
30
30
30
30
Viscosity Ratio
(RTFO or TFO
3
3
3
3
3
Flash Point, C,
Minimum
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15. Mix Design Procedures
Asphalt Content, Aggregate
Gradation and PG or RAP
 Gradation of New Aggregate
 Combined Gradation of Recycled Mix
 75 Blow Marshall Mix Design per
COLA Brown Book

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16. Binder Replacement
Binder Replacement +( (A x B)/C ) x 100
 A = RAP percent binder content
 B = RAP percent in mixture
 C = Total percent binder content in
mixture.

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17. COLA Example
A = RAP AC% = 5.4
 B = RAP % in mixture = 50
 C = Total percent binder in mixture =
5.2


Binder Replacement = 51.9%
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18. Testing

Extensive QC Testing
– Gradation and AC% on RAP
– Gradation on aggregates
– PG 64 -10 and Recycling Agent
– 75 Blow Marshalls

Extensive QA testing
– 4 to 8 samples
– 75 Blow Marshalls
– Superpave for ARRA jobs
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21. RAP Processing
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22. Stockpiling
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23. Finished Product
½-inch minus
RAP
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28. THANK YOU.
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30. Questions?
Pascal Mascarenhas
Vulcan Materials
mascarenhasp@vmcmail.com
626-856-6190 Phone
626-969-2918 Fax
626-705-6611 Cell
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