MONITORING ASPHALT CONCRETE PERFORMANCE AT HIGH ALTITUDES IN THE PERUVIAN ANDES
Thermal cracking in Peru usually occurs in roads with elevations higher than 3,700 meters above sea level (MASL). Asphalt pavements at elevations between 3,700 and 4,300 MASL usually develop thermal cracking, but this type of distress is more severe at even higher altitudes, especially with the combined effects of the large amount of solar radiation, daily temperature cycle, and relatively large amounts of precipitation. The asphalt concrete (AC) thickness of 8 to 12 cm in the La Oroya-Cerro de Pasco Road was designed to carry traffic of approximately 1,000 trucks per day. When the asphalt mixture was designed and constructed according to standard practice and specifications, severe longitudinal cracking appeared 5 to 8 months after completion of construction. In order to reduce this thermal cracking, the following material characteristics and construction procedures were analyzed: (a) engineering properties of the top crude and the asphalt cement; (b) engineering properties of aggregates, particularly those used for fines and filler materials; (c) optimum heating temperature of the asphalt aggregates before mixing; (d) minimum air temperature at which AC can be laid and compacted; (e) measures taken to protect the prime coat and base course; (f) types of asphalt cements used and their respective engineering properties; (g) tensile strength and workability characteristics of the AC mixture; and (h) types and quantities of additives. Preliminary conclusions of specification modification have been adopted by the Peruvian road authorities to improve asphalt performance at high altitudes.
- Record URL:
- Record URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309050502
-
Supplemental Notes:
- This paper appears in Transportation Research Record No. 1269, Asphalt Mix Materials and Mixtures 1990. 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:
- Greenstein, Jacob
- Herrera, Y
- Garcia, Alberto
- Publication Date: 1990
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 150-157
- Monograph Title: Asphalt mix materials and mixtures, 1990
-
Serial:
- Transportation Research Record
- Issue Number: 1269
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Additives; Aggregates; Altitude; Asphalt cement; Asphalt concrete; Cracking; Pavement cracking; Performance; Properties of materials; Specifications; Temperature; Tensile strength; Thermal stresses; Workability
- Geographic Terms: Peru
- Old TRIS Terms: Thermal fracture
- Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 00602692
- Record Type: Publication
- ISBN: 0309050502
- Files: TRIS, TRB
- Created Date: Dec 31 1990 12:00AM