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Title:

Self-Consistent Micromechanics Models of an Asphalt Mixture

Accession Number:

01123093

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

An asphalt mixture is a composite material consisting of three components: asphalt binder, aggregate and air. The mechanical properties of asphalt mixtures are mostly evaluated from empirical approaches that are usually limited to measurement conditions. This paper takes a mechanistic approach by using micromechanics theory for composite materials to develop self-consistent micromechanics models for an asphalt mixture. The mixture analysis method described in this paper is applied to measured properties of an asphalt concrete mixture that is commonly used in Texas. These models are programmed in MATLAB using the System Identification Method and are applied to the analysis of the frequency-dependent magnitudes of viscoelastic properties of an asphalt mixture at different aging periods. The inverse calculation model takes as input the volumetric composition of the mixture and the measured frequency-dependent bulk and shear properties of the asphalt mixture and the binder and extracts from them the bulk and shear properties of the aggregate. The forward calculation model takes as input the frequency-dependent bulk and shear properties of the aggregate and binder and produces the frequency-dependent properties of the asphalt mixture. It has been demonstrated that the inverse and forward operations are in fact the inverse of each other and that the inferred aggregate properties are realistic. These models provide a technique to catalog the properties of aggregate and use them in a computerized determination of the combinations of binders, aggregates and air to produce the desired properties of asphalt mixtures.

Monograph Accession #:

01120148

Report/Paper Numbers:

09-3492

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Luo, Rong
Lytton, Robert Leonard

Pagination:

17p

Publication Date:

2009

Conference:

Transportation Research Board 88th Annual Meeting

Location: Washington DC, United States
Date: 2009-1-11 to 2009-1-15
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (10) ; References (16)

Identifier Terms:

MATLAB (Computer program)

Uncontrolled Terms:

Micromechanics

Subject Areas:

Design; Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers

Source Data:

Transportation Research Board Annual Meeting 2009 Paper #09-3492

Files:

TRIS, TRB

Created Date:

Jan 30 2009 7:54PM