MECHANICAL PROPERTIES OF ASPHALT MATERIALS AND STRUCTURAL DESIGN OF ASPHALT ROADS
NUMEROUS PROPOSED RATIONAL APPROACHES TO BITUMINOUS ROAD DESIGN CONTRIBUTED BY PREVIOUS INVESTIGATORS ARE REVIEWED. THE MECHANICAL PROPERTIES AND THE TEST METHODS FOR THE PROPERTIES OF MATERIALS ENTERING INTO CONSTRUCTION OF ROAD CARPETS ARE DISCUSSED. THE CHARACTERISTICS OF ASPHALTS AND AGGREGATES WHICH AFFECT BOTH THE ELASTIC AND PLASTIC BEHAVIOR OF MIXTURES ARE DESCRIBED. THE PROBLEM OF ANALYZING THE PROPERTIES AND FUNCTIONS OF BASE COURSES, SUB-BASES, AND SUB-SOIL LAYERS ARE DISCUSSED. DESIGN METHODS FOR ROAD CONSTRUCTIONS ARE PRESENTED. DESIGNS FOR THE ENTIRE LAYERS SYSTEM FOR STATIC LOADS AND THE DESIGN FOR ONLY THE ROAD CARPET FOR STATIC LOADS ARE DISCUSSED IN DETAIL. IT IS SHOWN THAT FOR SAND SHEET, TENSILE STRENGTH DECREASES WITH INCREASED DURATION OF LOADING IRRESPECTIVE OF TEMPERATURE. BONDING STRENGTH DECREASES WITH AN INCREASE IN THE NUMBER OF LOAD REPETITIONS APPLIED TO THE SPECIMEN. THIS INDICATES THE EFFECT OF FATIGUE. IT IS CONCLUDED THAT TO AVOID CRACKED FORMATION, THE LOWEST F/B RATIO COMPATIBLE WITH OTHER CRITERIA SHOULD BE EMPLOYED.
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Supplemental Notes:
- Vol 33, pp 185-200. 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:
- Nijboer, L W
- Herner, R C
- Publication Date: 1954
Media Info
- Media Type: Digital/other
- Monograph Title: Proceedings of the Thirty-Third Annual Meeting of the Highway Research Board, Washington, D.C., January 12-15, 1954
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Serial:
- Highway Research Board Proceedings
- Volume: 33
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Aggregates; Asphalt; Asphalt pavements; Base course (Pavements); Bituminous mixtures; Bond strength (Materials); Bonding; Elasticity (Mechanics); Mechanical properties; Pavement design; Plasticity; Road construction; Subbase (Pavements); Subsoil; Test procedures
- Uncontrolled Terms: Subbase
- Old TRIS Terms: Layered system mechanics
- Subject Areas: Construction; Geotechnology; Highways; Materials; Pavements;
Filing Info
- Accession Number: 00210859
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: May 13 1994 12:00AM