00616324

Component

http://onlinepubs.trb.org...trr/1991/1301/1301-011.pdf

https://scholar.google.co...rati&publication_year=1991

In the United States, approximately 93% of hard-surfaced roads are surfaced with asphaltic concrete mixtures. These mixtures are a combination of high-quality aggregates and an asphalt cement. The aggregates must be able to resist abrasion and degradation during manufacturing, placing, and compacting. For decades, researchers studied the resistance of aggregates to abrasion and impact. The most common test used to measure this resistance is the Los Angeles (LA) abrasion test. The LA test has been used for many years throughout the United States and has a local history. From this history, acceptance specifications have been written. The objectives were to determine (a) the extent of the use of LA values in the United States; (b) any discernible difference in the level of performance (i.e., strengths) between laboratory-prepared Marshall specimens using different aggregate sources; and (c) the level of degradation of extracted aggregates. In general, the majority of states use the LA abrasion test for writing specifications. In some cases, there were not significant differences between the dry and wet indirect tensile strength and resilient modulus values of specimens prepared with aggregates with low LA values versus specimens prepared with aggregates with high LA values. The gradation analysis of the recovered aggregates indicated that no major degradation of aggregates occurred with various compactive efforts.

This paper appears in Transportation Research Record No. 1301, Factors Affecting Properties and Performance of Pavements and Bridges 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01407099

p. 77-86

1991

Transportation Research Record

0309051053

Figures (7) ; References (14) ; Tables (7)

Aggregate gradation; Aggregates; Materials tests; Modulus of resilience; Quality control; Specifications; Strength of materials; Tensile strength

Los Angeles Abrasion Test

Aggregate testing; Quality

Geotechnology; Highways; I36: Aggregates

TRIS, TRB, ATRI

Oct 31 1991 12:00AM

• CHLORIDE CONTENT OF PORTLAND CEMENT CONCRETE POWDER BY A METHOD USING FLOCCULATION
• COMPARISON OF FOUR AGGREGATES USING THE WASHINGTON HYDRAULIC FRACTURE TEST
• CRACKS IN LATEX-MODIFIED CONCRETE OVERLAYS--HOW THEY GET THERE, HOW SERIOUS THEY ARE, AND WHAT TO DO ABOUT THEM
• EFFECT OF FLY ASH ON ALKALI-SILICA REACTIVITY IN CONCRETE
• EVALUATION OF PARTICLE SHAPE AND TEXTURE: MANUFACTURED VERSUS NATURAL SANDS
• FLEXURAL CRACKING IN CONCRETE STRUCTURES
• LABORATORY EVALUATION OF THE ALKALI CARBONATE REACTION
• LABORATORY TESTS FOR PREDICTING COARSE AGGREGATE PERFORMANCE IN ONTARIO
• LATEX MODIFICATION EFFECTS ON THE IMPACT RESISTANCE AND TOUGHNESS OF PLAIN AND STEEL-FIBER-REINFORCED CONCRETES
• LATEX MODIFICATION EFFECTS ON THE MECHANISMS OF MICROCRACK PROPAGATION IN CONCRETE MATERIALS
• LIGNITE FLY ASH CONCRETE HIGHWAY PAVEMENT--A 15-YEAR PERFORMANCE HISTORY
• MEASUREMENT OF AGGREGATE SHAPE, SURFACE AREA, AND ROUGHNESS
• MICRO-DEVAL TEST FOR EVALUATING THE QUALITY OF FINE AGGREGATE FOR CONCRETE AND ASPHALT
• PHYSICAL CHARACTERISTICS OF POLISH RESISTANCE OF SELECTED AGGREGATES
• RAPID, ACCURATE METHOD FOR THE DETERMINATION OF SULFUR TRIOXIDE IN HYDRAULIC CEMENT
• RESTORING SKID RESISTANCE TO CONCRETE PAVEMENTS AND BRIDGE DECKS USING A LATEX-MODIFIED PORTLAND CEMENT SLAG SLURRY
• ROLLER-COMPACTED CONCRETE SLABS USING PHOSPHOGYPSUM
• SILICA FUME, LATEX-MODIFIED PORTLAND CEMENT MORTARS AND CONCRETES
• USE OF HIGH-VOLUME CLASS F FLY ASH FOR STRUCTURAL-GRADE CONCRETE
• VISUALIZATION OF CHLORIDE DISTRIBUTION IN CONCRETE (ABRIDGMENT)