00728399

Component

https://doi.org/10.3141/1530-14

http://scholar.google.com...lotz&publication_year=1996

Deformations in asphalt pavements continue to create problems for pavement agencies. One factor that has been identified as contributing to the potential of asphalt concrete to deform is the angularity of particles in the asphalt and aggregate mix. A new video-based method of measuring angularity based on the properties of the Hough transform, a powerful mathematical tool commonly used to detect long straight lines in video images, is presented. The method detects and measures the length of any straight edge in a two-dimensional image of a particle that is then used to quantify the particle angularity. The technique resolved three different test patterns independent of size and angle of rotation. Seven sands were analyzed with the method. The results were consistent with the known qualities of the sands. Although still limited as an engineering application, shape analysis of aggregate by video imaging has the potential to provide insight into the mechanisms of pavement deformation and may provide a basis for specifications or guidelines for the use of manufactured and natural sands in asphalt concrete.

This paper appears in Transportation Research Record No. 1530, Recycled Rubber, Aggregate, and Filler in Asphalt Paving Mixtures.

English

p. 111-115

1996

Transportation Research Record

030905902X

Figures (7) ; References (11) ; Tables (1)

Aggregates; Aggregates by shape and surface texture; Angularity; Asphalt concrete; Hough transforms; Measurement; Sand; Specifications; Video imaging detectors

Aggregate shape

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

TRIS, TRB

Nov 8 1996 12:00AM

• AGGREGATE POLISHING RESISTANCE PRE-EVALUATION
• ARKANSAS EXPERIENCE WITH CRUMB RUBBER MODIFIED MIXES USING MARSHALL AND STRATEGIC HIGHWAY RESEARCH PROGRAM LEVEL I DESIGN METHODS
• BABBITT, MINNESOTA: CASE STUDY OF PRETREATED CRUMB RUBBER MODIFIED ASPHALT CONCRETE
• DEVELOPMENT OF RUBBER AND ASPHALT BINDERS BY DEPOLYMERIZATION AND DEVULCANIZATION OF SCRAP TIRES IN ASPHALT
• EFFECTS OF MINERAL FILLERS ON PROPERTIES OF STONE MATRIX ASPHALT MIXTURES
• EFFECTS OF SOME AGGREGATE AND FILLER CHARACTERISTICS ON BEHAVIOR AND DURABILITY OF ASPHALT PAVING MIXTURES
• EVALUATION OF PYROLIZED CARBON BLACK FROM SCRAP TIRES AS ADDITIVE IN HOT MIX ASPHALT
• EVALUATION SYSTEMS FOR CRUMB RUBBER MODIFIED BINDERS AND MIXTURES
• FEASIBILITY OF CRUMB RUBBER USE FOR ASPHALT PAVEMENT CONSTRUCTION
• HOT MIX ASPHALT RUBBER APPLICATIONS IN VIRGINIA
• INVESTIGATION OF STONE MATRIX ASPHALT MORTARS
• SHORT-TERM AND LONG-TERM AGING BEHAVIOR OF RUBBER MODIFIED ASPHALT PAVING MIXTURE
• USE OF SCRAP TIRE CHIPS IN ASPHALTIC MEMBRANE