01478922

Component

https://doi.org/10.3141/2335-04

http://scholar.google.com...ante&publication_year=2013

In this study, micro-Deval and Los Angeles (LA) abrasion tests were used to evaluate the durability of 72 coarse aggregates used for hot-mix asphalt (HMA) in Maine. Aggregates used in HMA must be durable and resistant to abrasion and degradation. Material loss in HMA pavements has recently been observed by the Maine Department of Transportation. Aggregate degradation has been hypothesized as a possible contributor. The micro-Deval results showed no correlation with results from the LA abrasion; the range in values was quite large. Two alternative methods of analyzing micro-Deval results were employed to measure the change in gradation of aggregate samples. A relatively large portion of tested aggregate sources was found to degrade significantly in the micro-Deval test while having acceptable AASHTO micro-Deval loss values, presumably as the result of fracturing instead of abrasion. The weighted-average method and the area-between-curves method proved to be effective in measuring the change in particle size distribution not captured with the Method 1 micro-Deval loss value. In addition, a significant influence of initial grading size was found in all the micro-Deval data, with finer initial gradations producing higher loss values. The alternative analysis methods for micro-Deval are recommended for use in detecting degradation not captured by the traditional micro-Deval value.

01490600

13-2713

English

pp 29–36

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309263320

Print

Figures (6) ; References (10) ; Tables (4)

Abrasion resistance; Abrasion tests; Aggregate tests; Coarse aggregates; Durability tests; Hot mix asphalt

Los Angeles Abrasion Test; Micro-Deval

Maine

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

PRP, TRIS, TRB, ATRI

Feb 5 2013 12:34PM

• Analytical and Laser Scanning Techniques to Determine Shape Properties of Aggregates
• Assessing Soil Stiffness of Stabilized Pavement Foundations
• Assessment of Scour on Bridge Foundations by Means of In Situ Erosion Evaluation Probe
• Blast Furnace Slag as Sustainable Material in Concrete Pavements
• Evaluating Laboratory Compaction Techniques of Reclaimed Asphalt Pavement
• Evaluation of Aggregate Imaging Techniques for Quantification of Morphological Characteristics
• Evaluation of Aggregate Size and Shape by Means of Segmentation Techniques and Aggregate Image Processing Algorithms
• Guidelines for Selection and Use of Coarse Recycled-Concrete Aggregates in Structural Concrete
• Improving Properties of Reclaimed Asphalt Pavement for Roadway Base Applications Through Blending and Chemical Stabilization
• Measuring Shear Wave Velocity in Laboratory to Link Small- and Large-Strain Behavior of Soils
• Microstructural Analysis for Mechanical Behavior of Granular Waste Materials
• Moisture-Sensitive and Stress-Dependent Behavior of Unbound Pavement Materials from In Situ Falling Weight Deflectometer Tests