Asphalt Roads Basics

1
Asphalt Roads Basics
2
Types of Asphalt Roads

• Conventional hot-mix asphalt
• Produced in a hot plant, laid with a paver, and
  compacted
• Called Plant Mix Pavement
• Invert Penetration
• Gravel road with layer(s) of asphalt sprayed on
  top
• Gravel Road with Reclaimed Asphalt Pavement (RAP)

3
Conventional Plant Mix Pavement

• Produced in Hot Plant
• Hauled to job site
• Placed by paver
• Compacted

4
Hot Plant
5
Paving and Compaction
6
Asphalt Surface Types

• Plant mix surface
• Uncommon in Wyoming
• Usually covered with a surface seal
• Open graded friction course
• Usually on higher volume WYDOT roads
• Called Plant Mix Wearing Course in Wyoming
• Chip Seals
• Common on state, city and county roads
• Invert penetration
• Compacted RAP (Reclaimed Asphalt Pavement)
• Gray zone between asphalt and gravel road

7
Plant Mix Pavement
8
Open Graded Friction Course
9
Chip Seal a new one
10
Chip Seal an old one
11
Invert Penetration Asphalt Road
12
Invert Penetration Asphalt Road
13
Invert Penetration Asphalt Road
14
Compacted RAP Asphalt Road
15
Gravel Road with RAP
16
Gravel Road with RAP
17
Gravel Road with RAP