01474875

Component

This study examines the effectiveness of Hot Mix Asphalt (HMA) overlay design strategies for the purpose of controlling the development of reflective cracking. A parametric study was conducted using a 3D Finite Element (FE) model of a rigid pavement section including Linear Viscoelastic (LVE) material properties for the (HMA) overlay and non-uniform tire-pavement contact stresses. Several asphalt mixtures were tested in the surface, intermediate, and leveling course of the HMA overlay. Results obtained show that no benefits can be anticipated by using either Polymer-Modified (PM) or Dense-Graded (DG) mixtures instead of Standard Binder (SB) mixtures in the surface or intermediate course. For the leveling course, the use of a PM asphalt binder was found beneficial in terms of mitigating reflective cracking. As compared to the SB mix, the use of PM asphalt mixture in the leveling course reduced the level of longitudinal tensile stress at the bottom of the HMA overlay above the PCC joint by approximately 30%.

This paper was sponsored by TRB committee AFD70 Pavement Rehabilitation.

01470560

13-0223

English

13p

2013

Transportation Research Board 92nd Annual Meeting

Digital/other

Figures; References; Tables

Bituminous overlays; Finite element method; Hot mix asphalt; Mix design; Reflection cracking; Viscoelasticity

Data and Information Technology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I70: Traffic and Transport

Transportation Research Board Annual Meeting 2013 Paper #13-0223

TRIS, TRB, ATRI

Feb 5 2013 12:11PM