5.16 Asphalt Rubber Gap-Graded Wearing Course New . 5.17 Crumb Rubber Modified Asphalt Binder Dense-Graded Courses New . CHAPTER 6 PAVEMENT DESIGN PROCEDURES Chapter 6 . 6.1 Pavement ME policy . 6.2.E Geotextile • Type A on all subgrades CHAPTER 8 RIGID PAVEMENT DESIGN . 8.11 Rounding pavement thickness in design. Chapter 8

4 Chart 1: Recommended Mixes for Normal HMA Applications (Proposed compaction levels based on NCHRP 9-9 levels @ 4% Per Voids) Low Volume Design Level Recommended Aggregate Size Binder Type Compaction Level Compacted Thickness Pavement Course: Main Line: Shoulder: SuperPave HMA Surface Course: 50 mm (2 inch) 50 mm (2 inch) SuperPave HMA Binder Course: 465 mm (18.25 inch) 150 mm (6 inch) Subbase Granular Material, Type C : 310 mm (12.25 inch) Pipe Underdrains: 100 mm (4 inch) Aggregate Shoulder Wedge, Type B : Lime Modified Subgrade: 305 mm (12 inch) 305 mm(12 inch A bonded wearing course (BWC) is a gap graded, ultra thin hot-mix asphalt (HMA) mixture applied over a thick polymer modified asphalt emulsion membrane. The high binder content seals the underlying road thereby protecting it from water infiltration and slows down the aging process. Leveling Binder is no longer being used. The pay item is HMA Binder Course (Hand Method), N70. The mix will be per Standard Specifications for "HMA Binder and Surface Course" • Temporary Ramp mix is per the Standard Specifications for "HMA Binder and Surface Course" (see "Butt Joints"). It requires Resident Engineer approval.

Binder and Mix: (1.7MB) Establishing HMA Mixing and Compaction Temperatures at the Project Level (92KB) Determination of Laboratory Mixing and Compaction Temperatures for HMA (105KB) Summary of TRB A2D05 April 7-9, 2003; Historical: (326KB) Observations of Field Experience with Superpave Projects Constructed in 1996; Performance:

The first recycled HMA project was constructed in 1976 on a 4-lane urban highway, in which the original pavement was recycled and replaced with a 175-mm (6.9-in) recycled HMA base, a 40 mm (1.6-in) recycled HMA binder and a 20-mm (¾-in) surface wearing course. The recycled HMA contained 50 percent RAP material. superpave asphalt mixture design, hma wearing course, pg 64-22, 10 to < 30 million esals, 12.5 mm mix, srl-e (0 to 400 ton) hma binder course, pg 64-22, 10 to Course Mix • Mix designed to provide a thin, rut and asphalt binder! Noise increases with size and HMA aggregate. OGFC Surfaces 96.2 96.8 97.0 97.1 3 ASPHALT PAVEMENT HMA is a state of the art mix design system which replaced the old standard Marshall method of mix design. There are four important HMA parameters which the owner must specify in order to ensure the proper design.

The first recycled HMA project was constructed in 1976 on a 4-lane urban highway, in which the original pavement was recycled and replaced with a 175-mm (6.9-in) recycled HMA base, a 40 mm (1.6-in) recycled HMA binder and a 20-mm (¾-in) surface wearing course. The recycled HMA contained 50 percent RAP material.

Pavement Course: Main Line: Shoulder: SuperPave HMA Surface Course: 50 mm (2 inch) 50 mm (2 inch) SuperPave HMA Binder Course: 465 mm (18.25 inch) 150 mm (6 inch) Subbase Granular Material, Type C : 310 mm (12.25 inch) Pipe Underdrains: 100 mm (4 inch) Aggregate Shoulder Wedge, Type B : Lime Modified Subgrade: 305 mm (12 inch) 305 mm(12 inch