EXPERIENCE IN IOWA WITH SPRINKLE TREATMENT OF ASPHALT PAVEMENTS
Experience in Iowa with the use of sprinkle treatments to improve the frictional characteristics of pavement surfaces is described. A 5.3-mile (8.5-km) research project was constructed in 1978 to evaluate sprinkle treatment surfaces. Six different sprinkle aggregates were rolled into three standard mixes used for asphalt surface courses. The sprinkle aggregates were quartizite, crushed gravel, granite, expanded-shale lightweight aggregate, dolomite, and a limestone-dolomite mixture. Precoating of the chips is one of the most important aspects of successful sprinkle treatments. Poorly coated chips result in substantial losses of sprinkle aggregate from the finished surface. Lowering temperatures after drying the sprinkle aggregate yields better coating. Manipulating coated chips in small piles and lightly sprinkling them with water just before use reduce congealment problems. Friction testing has shown the greatest improvement when quartizite and expanded shale were used: friction numbers were 8 to 10 points higher than those for nonsprinkled sections. Sprinkle treatments also yield greater macrotexture. (Author)
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Availability:
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Supplemental Notes:
- 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
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Authors:
- Shelquist, Robert A
- Huisman, Charles L
- Publication Date: 1983
Media Info
- Media Type: Print
- Features: Figures; References;
- Pagination: pp 118-124
- Monograph Title: Asphalt materials, mixtures, construction, moisture effects and sulfur
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Serial:
- Transportation Research Record
- Issue Number: 911
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Aggregates; Asphalt pavements; Costs; Dolomite; Expanded shale aggregates; Friction; Granite; Gravel; Lightweight aggregates; Limestone; Macrotexture; Precoated aggregates; Quartzite; Temperature
- Uncontrolled Terms: Crushed gravel
- Geographic Terms: Iowa
- Subject Areas: Construction; Finance; Geotechnology; Highways; Materials; Pavements; I52: Construction of Pavements and Surfacings;
Filing Info
- Accession Number: 00390800
- Record Type: Publication
- ISBN: 0309035546
- Files: TRIS, TRB
- Created Date: Dec 30 1984 12:00AM