01658423

Component

Recent studies on long-life flexible pavements indicate that it may be advantageous to design and construct asphalt mixtures with very high modulus mixtures. The French have been experimenting and designing pavements with high-modulus bases since the 1980s. This study considered the engineering properties of asphalt mixtures produced using a European specification for high-modulus asphalt concrete (HMAC) mixtures. This specification includes volumetric requirements such as asphalt content and air voids, but there are also requirements for engineering parameters that address performance requirements such as rutting and fatigue cracking. The purpose of this study was to investigate the European mixture design and evaluate its applicability on asphalt mixtures having higher modulus with local (U.S.) recycle asphalt materials (RAP and RAS).A comprehensive literature study was performed to assess the current state-of-the-practice on HMAC mixture design, pavement design, laboratory performance tests and full-scale pavement performance. The experimental plan included a variety of mixtures with different material and binders such that higher moduli were obtained compared to conventional mixtures. The plan included a French mixture with a stiff binder (PG 88-16), and three mixtures containing RAP with a polymer-modified binder (35% RAP, 35% RAP HiMA and 50% RAP). A fifth mixture containing 25% RAP and 5% RAS with a polymer-modified binder was also included. The laboratory testing program evaluated binder performance grade, dynamic modulus, fatigue cracking, and permanent deformation. The results of this study indicated that European mix design standard methods and specifications were successfully implemented on local (U.S.) virgin and recycled materials.

This paper was sponsored by TRB committee AFK50 Standing Committee on Structural Requirements of Asphalt Mixtures.

18-01447

English

16p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Asphalt mixtures; Fatigue cracking; Laboratory tests; Mix design; Polymer asphalt; Reclaimed asphalt pavements; Rutting; Shingles; Specifications; State of the practice

European Standards

High modulus pavements; High-modulus asphalt concrete

France; United States

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-01447

TRIS, TRB, ATRI

Jan 8 2018 10:22AM