Asphalt Pavement Association Of Michigan HMA Ultra Thin ...
Transcript of Asphalt Pavement Association Of Michigan HMA Ultra Thin ...
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2009 County Engineer’s Workshop
Charles E. Mills, P.E., Director of Engineering
2937 Atrium Drive, Suite 2022937 Atrium Drive, Suite 202Okemos, MI 48864Okemos, MI 48864
517517--323323--7800 7800 www.apawww.apa--mi.orgmi.org
HMA Ultra ThinHMA Ultra Thin
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
HMA Ultra-Thin:•Extends Pavement Service Life
•Protects the Pavement Structure
•Restores Pavement Smoothness
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Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Presentation Overview
What is HMA Ultra ThinSpecification Development
ValueWhen to Use, When to Rebuild
Project Examples
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Presentation Overview
What is HMA Ultra ThinSpecification Development
ValueWhen to Use, When to Rebuild
Project Examples
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Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
CloseClose--up .75 inup .75 in
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What does HMA Ultra-Thin do:
•Protects the pavement structure•Adds structural value•Corrects surface deficiencies•Improves skid - resistance•Improves ride quality (restores crown)
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Presentation Overview
What is HMA Ultra ThinSpecification Development
ValueWhen to Use, When to Rebuild
Project Examples
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Original Performance Targets:
•Low to moderate volume roads•Alternate to Chip Seal•Ability to improve ride quality•Life expectancy 6 - 8 years
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Specification Development:
•Survey of membership•Field review of projects constructed in early
1990’s • Gathered information on mixture properties• Use local materials
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Specification Development#1 #2 #3 #4 #5 #6 36A
Sieve JMF EXT JMF EXT JMF JMF Spec.
½ “ 100 100 100 100 100 100 1003/8” 100 99.4 100 100 98.3 100 92-100#4 94.0 93.2 87.5 79.7 74.3 93.7 65-90#8 64.0 75.0 69.9 59.8 55.6 42.3 55-75#16 39.8 51.2 40.1 41.0 22.1#30 27.3 35.1 38.1 26.9 29.1 15.3 25-45#50 19.1 22.2 17.5 15.3 11.3#100 11.8 12.3 9.9 8.5 8.3#200 8.0 5.5 8.1 5.9 6.5 6.4 3-10
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Saginaw Highway Saginaw Highway –– Grand Blanc Grand Blanc –– 1 yr old 1 yr old –– UltraUltra--Thin (#4)Thin (#4)
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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UltraUltra--Thin (#3) Davison Hwy (3 yrs old) MicroThin (#3) Davison Hwy (3 yrs old) Micro--SurfaceSurface
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
#1 #2 #3 #4 #5 #6JMF EXT JMF EXT JMF JMF
AC% 6.8 6.5 8 7.3 6 6.7A.I. 3.9 6.2 4.1 4.4Fines to AC 1-2-1 .85-1 1.01-1 .80-1 1.08-1 .96-1Stability NA 800 2124 1353 2296Flow NA 10 15.4 9.4 12.2% Air Voids 3 6.65 est 3 3 3VMA 20.9 21.6 18.5 19AC Pen 120/150 AC-5 120/150 AC-5 AC-5TMD 152.1 149 149 168 153.9Mrsh Dnsty 147.2 136.5 144.3 162.7 149Crush 54.4 100 92 100Application Rate 65# 85# 63# 65# 75# est 60-65#Modified AC NO NO 5% SBR 5% SBR NO NO
Specification Development
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Original Mixture Specification 1993
Aggregate Gradation: Total PassingSieve Size (% by weight)12.5 mm (1/2”) 1009.5 mm (3/8”) 99-1004.75 mm (#4) 75-952.36 mm (#8) 55-75600 µm (#30) 25-4575 µm (#200) 3-8
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Original Mixture Specification 1993
Physical Properties:
•Percent crush (min) 50%•Angularity Index(MTM 118)(min) 2.5
•L.A. Abrasion (max) 40
(Low to Moderate Traffic)
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Original Mixture Specification 1993
Mixture Criteria:
(Low to Moderate Traffic)
•Air Voids % 4.5•VMA (min) %,(Gse) 17.5•Fines/Binder % max 1.2•Flow (mm) 2 - 4•Stability min 4.0 kN
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Published 1st specification
Encouraged members to market to counties
Focused on MDOT implementation
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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MDOT Implementation
•Alternate to Micro-Surfacing & Chip Seal•Specification developed by Industry/MDOT Mixtures Task Force
•Mixture properties/materials engineered forspecific traffic levels
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Current MDOT Ultra - Thin HMA Mixture Specification
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Traffic ClassificationsLow
Volume
Comm. ADT*
MediumVolume
Comm. ADT*
HighVolume
Comm. ADT*
<380 380 - 3400 >3400
* Two* Two--Way Truck TrafficWay Truck Traffic
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Physical Properties of Combined Aggregates
ParameterLow
VolumeMediumVolume
HighVolume
PercentCrush (min)
50% 75% 95%
AngularityIndex
(MTM 118) (min)2.5 3.0 4.0
L.A. AbrasionLoss (max)
40 35 35
Aggregate WearIndex
260 260 260
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Ultra Thin H.M.A. Mixture Criteria
Parameter Low Volume
Medium Volume
High Volume
Marshall Air Voids % 4.5 4.5 5.0
VMA % (min) 15.5 15.5 15.5
Fines/Binder % (max) 1.2 1.4 1.4
Flow (mm) 2-4 2-4 2-4Stability,lbs
(min) 1200 1200 1200
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Asphalt Binder SelectionLow
VolumeComm. ADT
<380
Medium Volume
Comm. ADT380 - 3400
HighVolume
Comm. ADT>3400
PG 64-22 PG 64-28P PG 70-22 P
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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MDOT Ultra-Thin Overlay Specification:
•Two-Year Performance Warranty•Rutting•Raveling•Bleeding/Flushing•Debonding
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
MDOT Practice 2009:
•Low and Medium traffic volume in pavement sealant category.
Competes with chip seals and microsurfacing
•Emerging technology for high volume roads
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Guide Specification for HMA Ultra-Thin 2005:
•City/County Markets•Materials•Construction/QC
Density – Number of Rollers Method•Acceptance Sampling and Testing•Measurement and Payment
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Guide Specification
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Binder Selection for HMA Ultra-Thin:
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Presentation Overview
What is HMA Ultra ThinSpecification Development
ValueWhen to Use, When to Rebuild
Project Examples
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As Bid Cost: 2008
•Ultra-Thin – low $ 2.20•Ultra-Thin –medium $ 2.55•Ultra-Thin – high $ 2.83•Microsurfacing – warranty $ 2.44
Wtg.Avg. Cost per syd
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
$9,6687.55-10$72,509$5.15Mill & fill (1.5”)
$7,7437.55-10$58,078$4.12Single course overlay (1.5”)
$5,69275-9$39,845$2.83Ultra-thin high
$5,12975-9$35,903$2.55Ultra-thin med
$4,42575-9$30,975$2.20Ultra-thin low
$8.58943-5$34,354$2.44Micro-surface
$8,44843-5$33,791$2.40Double chip seal
Cost/mile* per year
APAM Life extension range average (years)
Life extension range (years)
Cost/mile(24’ wide)
$/sydTreatment
Unit Prices based on MDOT Information Unit Prices based on MDOT Information as of Oct. 2008as of Oct. 2008
Prevention Maintenance Treatments Cost ComparisonPrevention Maintenance Treatments Cost Comparison
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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UT Type # of Jobs Length (miles)
Ultra-thin low 30 256
Ultra-thin med 18 145
Ultra-thin high 8 50
MDOT Projects to Date
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Estimate of Total miles done through 2008, is Approximately 550 miles of HMA Ultra-Thin in all markets.
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Presentation Overview
What is HMA Ultra ThinSpecification Development
ValueWhen to Use, When to Rebuild
Project Examples
Existing Pavement Conditions:•Good cross section•Good base, structurally sound
•Visible surface distress may include:•Moderate cracking, ≤ 3/8” wide•Raveling and surface wear•Slight to moderate flushing or polishing•Occasional patch in good condition
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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MM--60 60 -- 20042004
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
USUS--127 127 -- 20052005
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Existing Pavement Preparation:
•Repair of minor base failures anddepressions
•Filling of voids in pavement surface•Removal/replacement of patches with high asphalt content
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Limitations:
•Severely distressed concreteDo Not Place On…
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Limitations:
•Rutted pavements require pre-treatmentDo Not Place On…
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Limitations:
•Pavements with a weak baseDo Not Place On…
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Advantages:
•Ease of construction, use standard paver•Minimal construction time•Don’t have to adjust structures•Don’t have to wait to place permanent pavement markings
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Advantages:
•Adds structural value•Very smooth riding surface•Improved ride quality•No excess stone buildup•No broken windshields from
loose aggregate
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Presentation Overview
What is HMA Ultra ThinSpecification Development
ValueWhen to Use, When to Rebuild
Project Examples
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
The Mt. Pleasant ExperienceThe Mt. Pleasant Experience
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Mt. Pleasant SpecificationMt. Pleasant SpecificationAggregate Gradation: Total Passing
Sieve Size (% by weight)
9.5 mm (3/8”) 100
4.75 mm (#4) 90-100
2.36 mm (#8) 70-9075 µm (#200) 0-5
Air Voids: 8.0 +/- 1.0 % @ 25 gyrations
VMA (max): 24.0 %VFA range: 60.0 – 70.0 %
Stability (Hveem): 25.0 (min)
Binder: PG 70-28 (polymer modified)
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
BennettBennett
HMA Ultra Thin overlays work well on streets that are experiencing longitudinal cracking.
Longitudinal cracks generally will not reflect through the HMA Ultra Thin overlay.
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AndreAndre
HMA Ultra Thin overlays work well in holding together pavements that are experiencing alligator cracking or block cracking.The asphalt pieces cannot become dislodged after being overlaid and the cracks do not reflect through the HMA Ultra Thin overlay.
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AndreAndre
HMA Ultra Thin Overlays are ideally suited for raising the street surface to the gutter elevation to allow water to drain off the street surface and prevent failure along the curb line.
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LincolnLincoln
HMA Ultra Thin Overlays can be placed on streets that have had the gutter previously overlaid without covering the entire curb back.
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
MapleMaple
HMA Ultra Thin overlays can be placed over crack sealing that was placed two or more years ago.Using HMA Ultra Thin on a street that has been crack-sealed within the last two years runs the risk of the crack seal material “bubbling” up through the overlay. The two year wait time allows the crack seal material to be worn enough to avoid the “bubbling” effect.
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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FessendenFessenden
This street was crack sealed in 2000. At first glance, it would appear that crack sealing would have been the appropriate maintenance technique. However, a closer look indicates something different …
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
FessendenFessenden
The asphalt is about ½” below the gutter, meaning that water cannot get off the street. Unless this problem is corrected, this street will begin to show the edge cracking effects of water getting into, and weakening, the subgrade.
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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FessendenFessenden
If this street had received an HMA Ultra Thin overlay, the water would be able to get off the street and edge cracking would not develop.
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
HMA Ultra Thin overlay can be used:HMA Ultra Thin overlay can be used:
- On streets that are experiencing longitudinal cracking - On streets that are experiencing alligator or block cracking- On streets where the asphalt surface is below the gutter- On streets where the gutter pan has been overlaid- On streets that have been crack sealed
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What does HMA Ultra Thin look like after What does HMA Ultra Thin look like after it is placed and in what situations can it be it is placed and in what situations can it be
used?used?
This next series of slides show the condition of some streets in the City
of Mt. Pleasant that have been overlaid with HMA Ultra Thin in the
last several years
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
HopkinsHopkins
Hopkins Street is a residential street that was overlaid with HMA Ultra Thin in 2005.
It was 700 feet long and the only street in that area of the city to be overlaid as part of the project.
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
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FairfieldFairfield
Fairfield Street is a residential street that was overlaid with HMA Ultra Thin in 2002.
The project involved placing HMA Ultra Thin on 8 different streets, over 7000 feet, in about one day.
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
FairfieldFairfield
It was part of a project in which every street in a neighborhood of approximately 100 residences was overlaid.
The Street department received many compliments and no complaints about the project.
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South DriveSouth Drive
South Drive was overlaid with HMA Ultra Thin in 2005. South Drive is used as the main and emergency entrances to Central Michigan Community Hospital.
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Industrial DriveIndustrial Drive
Industrial Drive was overlaid with HMA Ultra Thin in 2005. It is in an industrial area with heavy users such as a Pepsi Distribution plant.
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FancherFancher
Fancher Street is a truck route street that serves an industrial area in Mt. Pleasant, and is used as a Mission Street bypass by many residents and businesses. In 2000, Fancher Street needed something done soon in order to avoid a failure of the street that would require a complete reconstruction of the street.
How bad is too bad?How bad is too bad?
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
FancherFancher
This was their first project using an HMA Ultra Thin overlay. They used Ultra Thin in 2000 and had high hopes for a quick and inexpensive process.They did not know what to expect on this street, but were hoping to extend the life of the street by 5 years.
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FancherFancher
After 9 years, Fancher Street is in much better condition than they could have hoped. HMA Ultra Thin has performed better than their best expectations …
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
FancherFancher
and has become a staple of their maintenance program because of it.
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Pleasant Street Pleasant Street –– Roscommon CountyRoscommon County
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Pleasant Street Pleasant Street –– Roscommon CountyRoscommon County
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Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
HMA Ultra-Thin:•Extends Pavement Service Life
•Protects the Pavement Structure
•Restores Pavement Smoothness
Asphalt Pavement Association Of MichiganAsphalt Pavement Association Of MichiganHMA Ultra ThinHMA Ultra Thin
Questions ?
2937 Atrium Drive, Suite 2022937 Atrium Drive, Suite 202Okemos, MI 48864Okemos, MI 48864
517517--323323--7800 7800 www.apawww.apa--mi.orgmi.org