01550537

Component

Open-graded friction course (OGFC) is applied to pavement surfaces to increase driving safety under wet conditions, and recently, to reduce tire/pavement noise. The durability of OGFC, however, has been a concern since conventional OGFC mixes last typically less than ten years before major maintenance or rehabilitation is needed. This study investigates a new open-graded asphalt mixture that uses epoxy asphalt as binder to improve mix durability. One type of epoxy asphalt that has been successfully applied in dense-graded asphalt concrete for bridge deck paving was selected for this study. A procedure of compacting the mix into slab specimens was developed and a series of laboratory tests was conducted to evaluate the performance of the new mix, including Cantabro loss, permeability, friction, shear strength, and wheel rutting tests. Results showed superior overall performance of the open-graded epoxy asphalt mix compared to conventional open-graded asphalt mix. There are also preliminary indications that the OGFC mix with 4.75-mm nominal maximum aggregate size (NMAS) gradation can improve the resistance performance to raveling, while the OGFC mix with 9.5-mm NMAS gradation can improve the performance of surface friction at a high slip speed.

This paper was sponsored by TRB committee AFK40 Characteristics of Asphalt-Aggregate Combinations to Meet Surface Requirements.

01550057

15-2473

English

15p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References; Tables

Aggregate gradation; Asphalt concrete pavements; Bridge decks; Durability; Epoxides; Friction course; Open graded aggregates; Pavement performance

Epoxy asphalt; Nominal maximum aggregate size

Bridges and other structures; Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I36: Aggregates

Transportation Research Board Annual Meeting 2015 Paper #15-2473

TRIS, TRB, ATRI

Dec 30 2014 12:52PM