01082887

Component

http://www.trb.org/Publications/Blurbs/159461.aspx

The Oklahoma Department of Transportation (ODOT) has designed hot-mix asphalt (HMA) mixtures to research perpetual pavement at the National Center for Asphalt Technology (NCAT) test track. The HMA types include a rich bottom layer mixture, a Superpave 19.0-mm mixture, and a 12.5-mm stone mastic asphalt mixture. Each mix design was analyzed using the Bailey method to gain familiarity with the method and examine the method’s projection of performance. This paper provides an explanation of the Bailey method analysis performed on mix designs created for ODOT’s perpetual pavement research at the NCAT test track and considerations regarding the local application of the method. It also includes a summary of the method. The Bailey method was developed by Robert Bailey of the Illinois DOT in the early 1980s. The method evaluates the way aggregate particles fit together by analyzing unit weight, aggregate bulk gravity, and aggregate gradation. This packing depends on gradation, type, and amount of compactive effort, particle shape, particle surface texture, and particle strength. The basic suppositions of the Bailey method correspond well with traditional HMA design assumptions. The specific parameters used in the analysis may need to be re-evaluated on a regional basis. A key concern resulting from an analysis of Oklahoma mix designs is permeability associated with coarse-graded HMA mixtures.

01082884

English

pp 33-44

2007-12

Transportation Research Circular

Web

Figures (4) ; References (1) ; Tables (9)

Aggregate gradation; Asphalt mixtures; Hot mix asphalt; Mix design; Pavement performance; Permeability; Perpetual pavements; Stone matrix asphalt; Strength of materials; Superpave; Test tracks; Texture

Bailey method; Particle shape

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB

Dec 20 2007 10:58AM

• A Look at the Bailey Method and Locking Point Concept in Superpave Mixture Design
• Current Superpave Mix Design Practice: Survey of the User–Producer Regions
• Using the Indirect Tension Test to Evaluate Rut Resistance in Developing Hot-Mix Asphalt Mix Designs
• Using the Superpave Gyratory Compactor to Estimate Rutting Resistance of Hot-Mix Asphalt