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INFLUENCE OF FINE AGGREGATES ON ASPHALTIC CONCRETE PAVING MIXTURES

TWO TYPES OF FINE AGGREGATE, MATERIAL PASSING THE NO. 8 SIEVE AND RETAINED ON THE NO. 200 SIEVE, WITH DIFFERENT ANGULARITY AND SURFACE TEXTURE WERE USED FOR THE STUDY IN COMBINATION WITH SEVERAL CRUSHED ROCKS AND UNCRUSHED GRAVELS. THE COARSE AGGREGATES WERE SIZED FROM THE 3/4-IN. SIEVE TO THE NO. 8 SEIVE. MINERAL DUST WAS ALSO USED. MATERIAL PASSING THE NO. 200 SIEVE WAS OBTAINED BY PROCESSING A COMMERCIAL LIMESTONE DUST. SEVEN BASIC GRADATIONS OF MINERAL AGGREGATE WERE USED. FAMILIES OF CURVES SHOWING STABILITY VALUES AT OPTIMUM ASPHALT CONTENT PLOTTED AGAINST THE RELATIVE PROPORTIONS OF COARSE AND FINE AGGREGATE GREATLY INFLUENCED STABILITY VALUES AS MEASURED BY THE MARSHALL AND HVEEM TEST METHODS. FOR MIXES CONTAINING UP TO 50 PERCENT FINE AGGREGATE THE EFFECT OF THE TYPE OF FINE AGGREGATE WAS PRONOUNCED AND HAD A GREATER EFFECT ON STABILITY THAN CHANGES IN THE RELATIVE PROPORTIONS OF COARSE AND FINE AGGREGATE OR TYPE OF COARSE AGGREGATE USED. FOR MIXES CONTAINING LESS THAN 50 PERCENT FINE AGGREGATE THE EFFECT OF THE TYPE OF FINE AGGREGATE DECREASED, BUT STILL REMAINED SIGNIFICANT WITH AS LITTLE AS 25 PERCENT FINE AGGREGATE. IN ADDITION TO THE EFFECT OF FINE AGGREGATE TYPE ON MARSHALL AND HVEEM STABILITY VALUES, FAMILIES OF MINIMUM AGGREGATE VOIDS CURVES INDICATED THAT FINE AGGREGATE TYPE ALSO HAD CONSIDERABLE EFFECT ON THE AGGREGATE VOIDS CHARACTERISTICS OF MIXES. WHILE THE STABILITY TEST METHODS USED FOR EVALUATION OF THE EFFECT OF FINE AGGREGATE TYPE ON THE ASPHALTIC CONCRETE PAVING MIXES ARE EMPIRICAL, THESE STABILITY METHODS ARE BEING USED WIDELY AND HAVE BEEN EXTENSIVELY CORRELATED WITH ASPHALT PAVEMENT PERFORMANCE. IT IS FELT THAT THESE INVESTIGATIONS WILL PROVIDE THE DESIGNER OF ASPHALT PAVING MIXES WITH BASIC INFORMATION HELPFUL IN PROPORTIONING AND SELECTION OF FINE AGGREGATE FOR MIXES. /AUTHOR/

Record URL:
- https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/37/37-013.pdf
Supplemental Notes:
- Vol 37, pp 219-255, 57 FIG, 3 TAB, 3 REF, 1 APP. 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.
Authors:
- Griffith, J M
- Kallas, B F
- Lefebvre, J A
Publication Date: 1958

Media Info

Media Type: Digital/other
Monograph Title: Proceedings of the Thirty-Seventh Annual Meeting of the Highway Research Board, Washington, D.C., January 6-10, 1958
Serial:
- Highway Research Board Proceedings
- Volume: 37
- Publisher: Highway Research Board

Subject/Index Terms

TRT Terms: Asphalt concrete; Asphalt content; Bituminous mixtures; Fine aggregates; Stability (Mechanics); Texture; Void ratios
Old TRIS Terms: Void
Subject Areas: Geotechnology; Highways; Materials;

Filing Info

Accession Number: 00211639
Record Type: Publication
Files: TRIS, TRB
Created Date: Sep 27 1971 12:00AM