00755024

Component

https://doi.org/10.3141/1630-04

http://scholar.google.com...Reid&publication_year=1998

For the design of asphaltic paving mixtures under heavy traffic loading, the Superpave system specifies use of performance-based mixture tests and prediction models to supplement volumetric mix design procedures. Central to the mechanics-based thermal cracking model used in Superpave is the prediction of thermally induced stresses based on a master curve and shift factor concept. The original version of Superpave had procedures for automated construction of the mixture creep compliance master curve from measured mixture properties. However, recent studies have indicated the need for several new modeling techniques, the development of which has resulted in the need for substantially more sophisticated procedures for automated construction of the master curve. This paper details the development of a computer program called MASTER, which automates master curve construction using built-in logic capabilities designed to handle the wide variety of measured responses encountered in practice. MASTER was found to agree closely with manually determined shift factors for 36 field mixtures investigated. The program was also found to be extremely robust, producing rational shift factors even when used to analyze complicated, thermally damaged materials. On the basis of these findings, the procedures developed here are recommended for inclusion in future revisions of the Superpave performance modeling software.

This paper appears in Transportation Research Record No. 1630, Asphalt Mixtures: Stiffness Characterization, Variables, and Performance.

English

p. 28-36

1998

Transportation Research Record

0309065011

Figures (11) ; Photos (1) ; References (8) ; Tables (1)

Asphalt mixtures; Automation; Computer programs; Creep; Highway curves; Superpave

Creep compliance; Master curves

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Oct 9 1998 12:00AM

• APPLICABILITY OF SUPERPAVE TO MODIFIED ASPHALTS: A MIXTURE STUDY
• CALCULATING AIR VOIDS AT SPECIFIED NUMBER OF GYRATIONS IN SUPERPAVE GYRATORY COMPACTOR
• CORRELATION OF SUPERPAVE G*/SIN DELTA WITH RUTTING TEST RESULTS FROM ACCELERATED LOADING FACILITY
• DETERMINING GYRATORY COMPACTION CHARACTERISTICS USING SERVOPAC GYRATORY COMPACTOR
• EFFECT OF AGGREGATE GRADATION ON FATIGUE LIFE OF ASPHALT CONCRETE MIXES
• EFFECTS OF AGING ON VISCOELASTIC PROPERTIES OF ASPHALT-AGGREGATE MIXTURES
• EVALUATION OF ABILITY OF SUPERPAVE SHEAR TESTER TO DIFFERENTIATE BETWEEN MIXTURES WITH DIFFERENT AGGREGATE SIZES
• EVALUATION OF STRIPPING FOR ASPHALT CONCRETE MIXTURES USING ACCELERATED TESTING METHODS
• IDENTIFICATION OF MOISTURE-SUSCEPTIBLE ASPHALT CONCRETE MIXES USING MODIFIED ENVIRONMENTAL CONDITIONING SYSTEM
• LOW-TEMPERATURE CRACKING AND AGING PERFORMANCE OF MODIFIED ASPHALT CONCRETE SPECIMENS
• REFERENCE STANDARDS FOR USE WITH INDIRECT TENSION TEST
• RELATIONSHIPS AMONG RATE-DEPENDENT STIFFNESSES OF ASPHALT CONCRETE USING LABORATORY AND FIELD TEST METHODS
• SHORT-LOADING-TIME STIFFNESS FROM CREEP, RESILIENT MODULUS, AND STRENGTH TESTS USING SUPERPAVE INDIRECT TENSION TEST