00755029

Component

https://doi.org/10.3141/1630-09

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

A study was conducted to determine whether the results from the Superpave shear tester (SST) could measure the effect of nominal maximum aggregate size on rutting susceptibility of asphalt mixtures without the need of a model. Four mixtures were analyzed using direct measurements from the SST. Two of the mixtures were prepared with AC-5 asphalt cement and nominal maximum aggregate sizes of 19.0 mm and 37.5 mm. The other two were prepared with AC-20 asphalt cement and the same two gradations. The results were analyzed statistically and compared with the performance of the respective mixtures tested by the Federal Highway Administration (FHWA) Accelerated Loading Facility (ALF). The specimens were compacted to a target air voids of 7% using the Superpave gyratory compactor. The testing sequence consisted of performing the simple shear at constant height (SSCH) test followed by the frequency sweep at constant height (FSCH) test at 40 deg C and 58 deg C. These temperatures were chosen because they represent, respectively, the highest temperature used in Superpave complete analysis and the target pavement temperature at 20 mm depth used in the ALF tests. After the SSCH and FSCH tests, the repeated shear at constant height (RSCH) test was performed on all samples at 40 deg C. The ALF provided a significant decrease in rutting susceptibility with increase in aggregate size; however, the SST was unable to separate mixtures with the same binders and the two different nominal maximum aggregate sizes.

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

English

p. 69-76

1998

Transportation Research Record

0309065011

Figures (8) ; References (15) ; Tables (4)

Aggregates; Asphalt cement; Asphalt mixtures; Rutting; Shear tests; Superpave; Temperature

Aggregate size

Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Oct 12 1998 12:00AM

• APPLICABILITY OF SUPERPAVE TO MODIFIED ASPHALTS: A MIXTURE STUDY
• AUTOMATED PROCEDURE FOR GENERATION OF CREEP COMPLIANCE MASTER CURVE FOR ASPHALT MIXTURES
• 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 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