00743184

Component

https://doi.org/10.3141/1590-01

http://scholar.google.com....+Wu&publication_year=1997

Aggregate degradation during gyratory compaction may cause changes in the original gradation of the aggregate, and it may also affect volumetric requirements for Superpave Level I mix design. The effect of aggregate degradation on the design gradation and final volumetric properties of the asphalt mix compacted by the Superpave gyratory and Astec vibratory compactors was evaluated. Because vibratory compaction is an alternative compaction method that simulates field compaction, a vibratory compactor developed by Astec Industries, Inc., was used for comparison with the Superpave gyratory compactor. Aggregates with high and low Los Angeles abrasion losses were used to evaluate the effect of aggregate toughness or abrasion resistance on gradation change and volumetric properties. The changes in the amount of material passing the 0.075-mm sieve due to aggregate degradation during compaction were not significant enough to prevent specimens from meeting dust proportion requirements, regardless of whether low- or high-abrasion loss aggregates were used. A mix containing high-abrasion aggregate was less likely to meet restricted zone requirements than a mix using low-abrasion aggregate after degradation resulting from compaction.

This paper appears in Transportation Research Record No. 1590, Asphalt Mixture Quality, Characteristics, and Performance.

English

p. 1-9

1997

Transportation Research Record

0309061636

Figures (7) ; References (4) ; Tables (8)

Abrasion resistance; Aggregate gradation; Alternatives analysis; Compactors; Superpave; Vibratory compaction

Gyratory compactors

Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials; I36: Aggregates

TRIS, TRB, ATRI

Nov 21 1997 12:00AM

• ANALYSIS OF PAVEMENT RUTTING DATA FROM FHWA PAVEMENT TESTING FACILITY SUPERPAVE VALIDATION STUDY
• COMPARISON OF COARSE MATRIX HIGH BINDER AND DENSE-GRADED HOT-MIX ASPHALT
• DESIGN, CONSTRUCTION, AND ANALYSIS OF PAVEMENTS USING ACCELERATED LOADING FACILITY
• DEVELOPMENT OF TEMPERATURE-EFFECT MODEL FOR PREDICTING RUTTING OF ASPHALT MIXTURES USING GEORGIA LOADED WHEEL TESTER
• EVALUATION OF RUT-RESISTANT PROPERTIES OF ASPHALT MIXES UNDER FIELD AND LABORATORY CONDITIONS
• FRACTURE MORPHOLOGY AND FRACTURE TOUGHNESS MEASUREMENT OF POLYMER-MODIFIED ASPHALT CONCRETE
• FULL-SCALE RUTTING TESTS OF LARGE-STONE ASPHALT MIXTURES
• INTERPRETATION OF INDIRECT TENSION TEST BASED ON VISCOELASTICITY
• LONG-TERM OVEN-AGING EFFECTS ON FATIGUE AND INITIAL STIFFNESS OF ASPHALT CONCRETE
• SELECTING MOST DESIRABLE HOT-MIX ASPHALT MIXTURES
• TEST METHODS FOR EVALUATION OF COLD-APPLIED BITUMINOUS PATCHING MIXTURES
• THEORETICAL EVALUATION OF POISSON'S RATIO AND ELASTIC MODULUS USING INDIRECT TENSILE TEST WITH EMPHASIS ON BITUMINOUS MIXTURES