ASPHALT:

INNOVATION &

SOLUTIONS

Bill Rosener

Executive Vice President

Asphalt Paving Association of Iowa

&

Iowa

Asphalt

Industry is

the Best in

the USA

What we offer: Project Consultation

Design, Methods, Planning

Lunch and Learns

Expert Advice

Website www.apai.net

Open Houses

Attend and learn, or feature your project

Facebook : www.facebook.com/Asphaltiowa

Whatever you need…we can help!

What’s New in Asphalt: Price of Asphalt is DOWN!

Use of Asphalt is INCREASING in Iowa Cities and Counties!

New Binder / Mix level Designations

New rehabilitation methods: Rock/Asphalt Interlayers

Full-Depth Reclamation

High-Performance Thin Overlays

Building more Perpetual Pavements

APAI Innovative Design/LCCA Aides

More Alternate Bids!

Darwin Larson!

New Binder / Mix Levels

Asphalt Interlayer

Perpetual Pavement Design

I-Pave Design Program

I-Save LCCA

Today’s Agenda

New Binder Bid Items

What are we changing?

1. How the High Temperature PG is Determined

2. How we select Binder Grades

Why are we changing?

“Bumping” the High Temp today is unrealistic

for modified binders

-34°C

-29°F

-28°C

-18°F

58°C

136°F

1M ESALS

58-28

10M ESALS

1 BUMP

64°C

147°F

64-28

30M ESALS

2 BUMPS

70°C

158°F

70-28

58°C 136°F

<1M ESALS >45

58-28 S

1-10M ESALS 15-45 mph

1 BUMP

58°C 136°F

H

>10M ESALS >15 mph

2 BUMPS

58°C 136°F

V

>10M ESALS <15 mph

3 BUMPS

58°C 136°F

E

New IDOT Binder “Bumping”

Designations

58-28S = Standard Traffic ≤ 1M ESALS and

>45 mph

58-28H = High Traffic >1M ESALS up to 10M ESALS or

15-45 mph**

58-28V = Very High Traffic >10M ESALS or

≤ 15 mph

58-28E = Extremely High Traffic >10M ESALS and

≤ 15 mph

Overlays ≤ 4” and Secondary Projects

≤

New Construction, CIR, Rubblization, Crack

and Seat, FDR, Overlays>4”

≤

≤

New Mix Bid Items:

What are we changing?

Reducing the number of gyration levels from 7 to 3.

Standard

High

Very High

Why are we changing? Simplification. Most states have already moved to fewer gyration levels.

Iowa facilities do not experience 7 different mixtures of traffic loadings.

Gyration Changes

ESALS Old Gyrations New Gyrations @ 4%

Air

100K 68 (@ 3% Air) 50

300K 68 (@ 3.5% Air) 50

1M 76 50

3M 86 75

10M 96 75

30M 109 95

100M 126 95

Non-Primary Routes ◦ PG 64-22S may be substituted

Primary Routes ◦ PG 64-22S may be substituted for overlays ≤ 4” on

jointed PCC.

Keep Letter Designation

Sites where low temps < -22C

Typical Bid Item:

HMA Standard Traffic (ST) Surface, ½”,

PG 58-28S or 64-22S

Asphalt Interlayer

ASPHALT INTERLAYER

A highly flexible, highly-polymerized,

impermeable hot mix asphalt interlayer

• Thin (1”) hot mix asphalt (HMA)

• Fine aggregate (readily available)

• Highly elastic polymer modified asphalt (PG 64-34)

• Overlay with a minimum of 3” traditional HMA

• Cost is +30%-40% of traditional HMA

• IDOT Specification 2303

City of Waterloo

ADVANTAGES OF

ASPHALT INTERLAYER

• Standard construction process

• Significantly delays reflective cracking longer than straight HMA overlays

• Only 30% more than Traditional HMA

• Impermeable interlayer protects pavement structure from moisture damage

• Lengthens pavement surface life (3-5 yrs+)

• 100% Recyclable

*****Perfect for Oralabor Road*****

Perpetual Pavements

WHAT IS PERPETUAL PAVEMENT?

According to “Perpetual Asphalt Pavements- A Synthesis” Perpetual pavement is an asphalt pavement designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction, and needing only periodic surface renewal in response to distresses confined to the top of the pavement.

Perpetual Pavements

SMA, OGFC or Superpave

} 100 mm to 150 mm

Zone Of High Compression High Modulus

Rut Resistant Material

Max Tensile Strain Flexible Fatigue Resistant Material

Pavement Foundation

Pavements requiring only periodic surface renewal

Benefits of Perpetual Asphalt

Pavements Fast to Construct

Staged Construction

Economical

Environmentally Sustainable

Easy to Maintain and Repair

Never lose your curb line!

Smooth and Beautiful

Perpetual IDOT Interstates I-80

Jasper, Johnson and Cedar Co.

Constructed 1962-64

Perpetual IDOT Highways

Cedar Rapids

Highway 100

Perpetual County Roads

Dallas County F31

Perpetual City Streets

Ashworth Road

West Des Moines

23 years old

• Court Ave : E 14th St –

E 18th St

• 31st St – Woodland - Center

• 42nd St Forest to University

2016 Des Moines Full-Depth

Pavements:

Perpetual County Roads

Dallas County F31

City of Des Moines

E. Court Ave .

Perpetual County Roads

Dallas County F31

City of Des Moines

E. Court Ave .

Perpetual County Roads

Dallas County F31

City of Des Moines

E. Court Ave .

Who Builds Perpetual

Asphalt Streets? City of Ames

City of Davenport

City of Des Moines

City of Council Bluffs

City of Mason City

City of Waverly

City of Cedar Rapids

City of Sioux City

City of West Des Moines

City of Waterloo

INNOVATIVE

DESIGN

AIDES

www.apai.net

I-Save Input Screen

Body (How?)

I-Pave and I-Save Report

APAI Awards Program Municipal Paving

Program Award (Cities

< 10,000 pop.)

Metropolitan Paving

Program Award (Cities

> 10,000 pop.)

Consulting Engineer of

the Year Award

Innovative Project /

Design of the Year Award

City Of Woodward Paving Project

City of Woodward, V & K Engineering and

Grimes Asphalt And Paving

2015 Municipal Paving Program Winners

Applications Due Oct 15!

Thank yous and Credits

Dr Chris Williams, ISU

Dr. Ashley Buss, ISU

Dr. Scott Schram, IDOT

Dave McDermott, City of Council Bluffs

QUESTIONS?

Thank you!

APAI

is at your service

515-233-0015

www.apai.net