01373191

Component

A comprehensive experimental study was conducted during the construction of a full-scale inverted pavement test section in LaGrange, Georgia. Inverted base pavements consist of an unbound aggregate base placed between a stiff cement-treated foundation layer and a thin asphalt cover. Unlike conventional pavements which rely on upper stiff layers to bear and spread traffic loads, the unbound aggregate inter-layer in an inverted base pavement plays a major role in the mechanical response of the pavement structure. Given the critical role of the unbound aggregate base and its proximity to the surface, special attention was placed to monitoring changes in the material behavior induced by compaction over the stiff cement-treated base and to characterize the stress dependent stiffness of the compacted aggregate. A detailed study of all layers was conducted along the test section before, during and after construction to gain critically needed information to enhance our understanding of the internal behavior and macro-scale performance of inverted pavement structures. The information compiled during the field test was used in a complementary numerical study.

This paper was sponsored by TRB committee AFP70 Mineral Aggregates

01362476

12-2537

English

12p

2012

Transportation Research Board 91st Annual Meeting

Digital/other

Figures; Photos; References; Tables

Aggregates; Base course (Pavements); Foundations; Numerical analysis; Pavements; Stiffness

Inverted section pavements

Georgia

Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I42: Soil Mechanics

Transportation Research Board Annual Meeting 2012 Paper #12-2537

TRIS, TRB

Feb 8 2012 5:10PM