Work Item
ASTM WK75536

New Specification for Aramid Fiber for Asphalt Mixtures

1. Scope

1.1 This standard specification covers a standardized method whereby an aromatic polyamide fiber to be used in asphalt mixtures can be specified. The aromatic polyamide fiber (shortened, aramid in untreated form) can be specified by physical and mechanical properties, and product form for use in asphalt mixtures. The main goal of adding aramid fiber is to improve the asphalt mixtures mechanical performance. Aramid fiber may provide structural properties to the mixture and thus is different than fibers such as cellulose fibers that are solely used to prevent drain down. The aramid fiber may be coated (i.e. “treated”) with a Fischer Tropsch wax, blended with a Polyolefin Fiber, or some other additive to reduce “fly-away” due to the lightweight aramid fiber. The mechanical properties listed in the standard specification are for the non-treated aramid fiber.


aramid fiber; fiber-reinforced asphalt concrete


Currently there is not an ASTM standard specification for aromatic polyamide (shortened, aramid) fiber for use in asphalt mixtures. Aramid fiber usage in asphalt mixture applications is growing across North America. A standard specification is needed to ensure that the agency is getting a consistent product. This standard specification will cover the composition, physical properties, and product form for the use of an aramid fiber in asphalt mixtures.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D04.23

Committee: D04

Staff Manager: Ashley Wiand

Work Item Status

Date Initiated: 01-15-2021

Technical Contact: Phillip Blankenship

Item: 001

Ballot: D04 (21-05)

Status: Withdrawn From Balloting

Item: 001

Ballot: D04 (21-03)

Status: Withdrawn From Balloting

Item: 002

Ballot: D04 (22-01)

Status: Will Reballot Item

Item: 005

Ballot: D04 (22-04)

Status: In Balloting