00348702

Component

http://onlinepubs.trb.org...s/trr/1981/821/821-008.pdf

https://scholar.google.co...Wood&publication_year=1981

Since base-course aggregate gradations have top sizes larger than 25.4 mm (1 in) in most cases, the adequacy of using the standard Marshall procedure in evaluating asphalt-stabilized base courses has been questioned. The findings of a comprehensive laboratory investigation that focused on the evaluation of the effect of aggregate top size on the Marshall test results of cold-mixed asphalt emulsion mixtures are reported. Marshall specimens were prepared by using a high-float asphalt emulsion, HFMS-2s, and aggregate top sizes of 19 and 38 mm (0.75 and 1.5 in). Other factors included in the study were asphalt emulsion content, aggregate type, and aggregate gradation. Marshall tests were performed at 22 deg C (72 deg F) to evaluate the mixture properties. Test results for such factors as stability, flow, stiffness, and index were obtained. Other mixture properties, such as specific gravity, air voids, retained moisture, and total liquid, were also evaluated. According to the test results, increasing the aggregate top size in the asphalt emulsion mixture from 19 to 38 mm increased the bulk specific gravity and decreased the air voids. The retained moisture and total liquid in the mixture after curing were not largely affected by the aggregate top size. The modified Marshall test results were altered to some extent by the change in aggregate top size. It is recommended that the effect of aggregate top size be taken into consideration when the standard Marshall procedure is used in designing asphalt emulsion mixtures with large aggregate top sizes. (Authors)

Publication of this paper sponsored by Committee on Characteristics of Bituminous Paving Mixtures to Meet Structural Requirements. 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

01411629

pp 44-49

1981

Transportation Research Record

60th Annual Meeting of the Transportation Research Board

0309032638

Print

Figures (10) ; Photos (1) ; References (5) ; Tables (1)

Aggregate gradation; Aggregates; Asphalt content; Asphalt mixtures; Base course (Pavements); Emulsified asphalt; Marshall test

Aggregate size

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

TRIS, TRB

Jun 30 1982 12:00AM

• ANALYSIS AND REPAIR OF WATER-DAMAGED BITUMINOUS PAVEMENT
• ASPHALT MIXTURES: COMPARATIVE ANALYSIS OF CHARACTERIZATION FOR DESIGN
• BEHAVIOR AND REPAIR OF DETERIORATED REINFORCED CONCRETE BEAMS
• CHARACTERISTICS AND PERFORMANCE OF ASPHALT-RUBBER MATERIAL CONTAINING A BLEND OF RECLAIM AND CRUMB RUBBER
• DESIGN FOR MINIMIZING DETRIMENTAL VIBRATIONS FROM CONSTRUCTION BLASTS
• DEVELOPMENT OF A CONSTRUCTION PRICE INDEX FOR MAJOR PUBLIC TRANSIT INVESTMENT PLANNING
• DEVELOPMENT OF AN IMPROVED AUTOMATED NUCLEAR BACKSCATTER GAGE
• MAGNITUDE OF HORIZONTAL MOVEMENT IN JOINTED CONCRETE PAVEMENTS
• MODIFICATION OF PAVING ASPHALTS BY DIGESTION WITH SCRAP RUBBER
• NONDESTRUCTIVE MONITORING OF CHLORIDE IN BRIDGE DECKS WITH A MOBILE NEUTRON-GAMMA SPECTROMETER
• OVERVIEW OF PAY-ADJUSTMENT FACTORS FOR ASPHALT CONCRETE MIXTURES
• PERFORMANCE COMPARISON BETWEEN A CONVENTIONAL OVERLAY AND A HEATER-SCARIFICATION OVERLAY
• PERFORMANCE OF OPEN-GRADED ASPHALTIC CONCRETE FRICTION COURSES IN ARIZONA
• RATIONAL APPROACH TO DESIGN OF BITUMINOUS STOCKPILE PATCHING MIXTURES
• REPAIR OF TORSIONALLY INADEQUATE CONCRETE BEAMS BY USE OF ADHESIVELY BONDED PLATES (ABRIDGMENT)
• TEXTURING OF CEMENT CONCRETE PAVEMENTS BY CHIP SPRINKLING THE FRESH CONCRETE