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Title: EFFECT OF COARSE AGGREGATE CONTENT ON STONE MATRIX ASPHALT RUTTING AND DRAINDOWN
Accession Number: 00714827
Record Type: Component
Availability: Find a library where document is available Abstract: The stone matrix asphalt (SMA) technical working group (TWG), composed of federal, state, and industry representatives, was formed in 1992. The SMA TWG developed the "SMA Model Material and Construction Guidelines". The model suggests using 20 to 28% passing the 4.75-mm sieve size. The effects of coarse aggregate content on the performance and draindown characteristics of SMA mixtures was evaluated. Performance was evaluated in terms of rutting using three wheel-tracking devices: the French pavement rutting tester, the Georgia loaded-wheel tester, and the German Hamburg wheel-tracking device. Draindown was evaluated using four tests: the German draindown test, the FHWA draindown test for open-graded friction courses, a proposed draindown test developed in the Bituminous Mixtures Laboratory at the Turner-Fairbank Highway Research Center, and the National Center for Asphalt Technology draindown test. Also, the effects of using a polymer instead of a fiber as the stabilizer in the SMA mixtures were examined. Data from the draindown tests and wheel-tracking devices showed that decreasing the coarse aggregate content reduced the amount of draindown without affecting the mixture performance in terms of rutting. When using a polymer instead of a fiber, the amount of mastic that drained down increased. On the basis of the Georgia loaded-wheel tester and the Hamburg wheel-tracking device, mixtures with the polymer had significantly lower rut depths than the mixtures with fiber. On the basis of the French pavement rutting tester, mixtures with the polymer had significantly lower rates of rutting (slopes) than mixtures with the fiber, but the rut depths at the end of the test were not statistically different.
Supplemental Notes: This paper appears in Transportation Research Record No. 1492, Hot-Mix Asphalt Design, Testing, Evaluation, and Performance. 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
Monograph Title: Hot-mix asphalt design, testing, evaluation, and performance Monograph Accession #: 01399807
Language: English
Authors: Mogawer, Walaa SStuart, Kevin DPagination: p. 1-11
Publication Date: 1995
Serial: ISBN: 309061563
Features: Figures
(2)
; References
(7)
; Tables
(9)
TRT Terms: Old TRIS Terms: Subject Areas: Geotechnology; Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials; I36: Aggregates
Files: TRIS, TRB
Created Date: Dec 4 1995 12:00AM
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