00965580

Component

https://doi.org/10.3141/1837-08

http://scholar.google.com...ames&publication_year=2003

Aggregate used in hot-mix asphalt (HMA) must be tough and durable, not only to withstand the effects of HMA production, transportation, and construction but also to resist the effects of traffic and the environment. Historically, the Los Angeles abrasion and impact test has determined the toughness of aggregates. The long-term durability characteristics of aggregates are generally determined using a soundness test: sodium or magnesium sulfate. During the National Cooperative Highway Research Program's Project 419, the micro-Deval test, in conjunction with the magnesium sulfate soundness test, were recommended in lieu of the Los Angeles abrasion and impact test and other soundness tests. Therefore, a study was needed within the southeastern United States to evaluate the range in micro-Deval results that could be expected. This research characterized the toughness and durability of aggregates with respect to their micro-Deval test results. Seventy-two aggregate sources from eight different states were included in this research. These aggregates were rated as good, fair, or poor with respect to performance by the contributing state. On the basis of the results of this study, some large differences were found in micro-Deval test results within a given performance category. There was no relationship between Los Angeles abrasion and impact and micro-Deval test results.

This paper appears in Transportation Research Record No. 1837, Geomaterials 2003.

English

p. 73-79

2003

Transportation Research Record

030908573X

Figures (8) ; References (5) ; Tables (3)

Abrasion tests; Aggregates; Durability; Hot mix asphalt; Soundness test; Toughness

Aggregate sources; Magnesium sulfate; Micro-Deval test

Southeastern United States

Geotechnology; Highways; I36: Aggregates

TRIS, TRB, ATRI

Nov 19 2003 12:00AM

• DESIGN OF GRANULAR PAVEMENT LAYERS CONSIDERING CLIMATIC CONDITIONS
• ENGINEERING BEHAVIOR OF STABILIZED SOILS
• ESTIMATION OF THE COMPRESSIVE STRENGTH AND MODULUS OF ELASTICITY OF CEMENT-TREATED AGGREGATE BASE MATERIALS
• FIELD EVALUATION OF THE STIFFNESS OF UNBOUND AGGREGATE BASE LAYERS IN INVERTED FLEXIBLE PAVEMENTS
• MEASURING SULFATE IN SUBGRADE SOIL: DIFFICULTIES AND TRIUMPHS
• REFINEMENT AND VALIDATION OF THE HYDRAULIC FRACTURE TEST
• STABILIZATION OF SULFATE-CONTAINING SOIL BY CEMENTITIOUS MIXTURES MECHANICAL PROPERTIES
• VALIDATED MODEL FOR PREDICTING FIELD PERFORMANCE OF AGGREGATE BASE COURSES