California Asphalt Pavement

Association

Spring Asphalt Pavement

Conference

April 13, 2017

Erik Updyke

Los Angeles County

Department of Public Works

APWA Co-Chair

Subsection 203-6 entirely new.

Incorporates applicable provisions from 203-7

and 400-4 (Type III mixtures) of the 2012

Edition.

20% maximum RAP.

Warm Mix added as a subsection. Specific

requirements need to be in Special Provisions.

“… shall be the product of mixing mineral aggregate and up to 20 percent … RAP …” Maximum RAP percentage increased from 15 to 20.

“When so specified in the Special Provisions or shown on the Plans, … may contain greater than 20 percent RAP and/or be produced using a warm mix asphalt (WMA) technology.”

No change in mix design method.

“… designated by class of combined aggregate gradation and

performance grade of paving asphalt, e.g. “C2-PG 64-10.””

Nomenclature revised to include suffix for RAP percentage

and WMA technology:

No suffix: RAP < 20%. “C2-PG 64-10”

“No RAP” Suffix: “R0.” “C2-PG 64-10-R0.”

RAP > 20% Suffix: “R” and the % RAP. “C2-PG 64-10-R25.”

WMA Suffix: “WMA.” “C2-PG 64-10-WMA.” “B-PG 70-10-

R25-WMA”

“Asphalt concrete mixtures may be

produced using a WMA technology if so specified in

the Special Provisions.”

Totally revised.

MAC-10TR deleted.

PG 64-28TR & PG 76-22TR added.

Edited.

New.

PG 64-28PM & PG 76-22PM added.

New.

Gradation for GG-D corrected in Table 203-

11.3.

2017 Supplement will not be

published.

Asphalt Rubber Hot Mix (ARHM)(“Wet Process”) (203-11, 302-9)

Tire Rubber Modified Asphalt Concrete (TRMAC) (“Terminal Blend Process”)(203-14, 302-12)

Crumb Rubber Modified Asphalt Concrete (CRUMAC) (“Dry Process”) (203-13, 302-11)

“Field Blend” (“Wet”) Process

(“Asphalt Rubber,” 203-11)

“Terminal Blend” Process

(“MAC15-TR,” “PG 64-28TR,”

“PG 76-22TR,”

203-14)

CP2 Center News, Sept. 2009

Change No. 276S. Add polymer modified emulsion to 203-3; specify PMCQS-1h as the standard emulsified asphalt for slurry seal in 203-4; and editorial revisions to 302-4.

Change No. 279S. Add microsurfacing.

Change No. 282S. Revise, update 302-1 (cold milling) and move to new 403; add micro-milling as new 404.

203-5.5.4 Work Site Mixing [REAS produced

in a slurry truck]. Remove from the SSPWC?

203-10 Latex Modified Asphalt Concrete.

Remove from the SSPWC?

203-13, 302-11 CRUMAC-GG. Remove from

the SSPWC?

203-6.3.3 Superpave Mix Design

Method.

203-6.6 Hot Mix Asphalt (“Superpave”)

Mixtures [Local Agency Version].

Superpave [Local Agency Version]

Approach:

Avoid “dry” mixes.

Determine, via independent testing, the

Superpave test parameters which result in

mixtures close to the current Hveem B and

C2 mixtures being produced.

Draft Subsections 203-3.3 and 203-6.6.

Superpave [Local Agency Version]

Hot drop (C2 mix) produced and samples split by Matich [thank you!].

Independent testing by 10 labs.

No. of gyrations which result in a mixture with 4% air voids to be determined by each lab.

No. of gyrations to be compared and a specific no. determined.

Additional testing on hot drops and samples from Blue Diamond and Vulcan [thank you!]

302-5 Asphalt Concrete Pavement.

“Raise the bar.”

Revise and update.

Address current best practices such as

automatic screed control, material transfer

vehicles, etc.

Special thanks to the Asphalt Concrete Task Force, Tom

Williams, LaBelle-Marvin, Chair; and the Surface Materials

and Methods Subcommittee, Chris Kubasek, Orange

County Public Works, Chair.

Participation on subcommittees and task forces is at an all

time low. For the “Greenbook” to continue as a

sustainable entity, new and broader participation from

public agencies, contractors, and consultants is needed.

THANK YOU FOR YOUR SUPPORT!