MODES OF FAILURE AND STRENGTH OF ASPHALT FILMS SUBJECTED TO TENSILE STRESSES
THE PRIMARY PURPOSE OF THIS INVESTIGATION WAS TO STUDY THE BEHAVIOR OF THIN FILMS OF ASPHALTS SUBJECTED TO TENSILE STRESSES. A NUMBER OF THEORIES THAT MIGHT EXPLAIN THE BEHAVIOR OF ASPHALTS OR SIMILAR MATERIALS IN THIN FILMS ARE REVIEWED AND THE ADVANTAGES AND DISADVANTAGES OF EACH THEORY ARE DISCUSSED. TO VERIFY THE HYPOTHESES AND THEORIES RELATED TO TENSILE PROPERTIES OF ASPHALTS, LABORATORY EXPERIMENTS WERE CONDUCTED ON THIN ASPHALT FILMS UNDER CONTROLLED TEST CONDITIONS. THE VARIABLES STUDIED, SELECTED ON THE BASIS OF THEORETICAL CONSIDERATION, WERE FILM THICKNESS, RATE OF EXTENSION, TEMPERATURE, AND SIZE OF SPECIMEN. THE FAILURE OF MECHANISM OF ASPHALT FILMS CAN BE PLACED IN THREE CATEGORIES - BRITTLE FRACTURE, TENSILE RUPTURE, AND SHEAR FLOW - ALL OF WHICH ARE INFLUENCED BY THE VARIABLES STUDIED. EQUATIONS ARE PRESENTED FOR PREDICTING THE LIMITING VALUE OF THE FILM THICKNESS CORRESPONDING TO EACH TYPE OF FAILURE. A HYPOTHESIS IS ALSO DEVELOPED THAT EXPLAINS THIS FAILURE MECHANISM AND THE BEHAVIOR OF ASPHALTS OVER A WIDE RANGE OF FILM THICKNESSES. IT IS ALSO SHOWN THAT TWO THEORIES - THE HYDRODYNAMIC THEORY AND THE THEORY OF POTENTIAL ENERGY AND CAVITIES - COULD BE USED TO PREDICT THE TENSILE STRENGTH OF ASPHALTS IN THICK AND THIN FILMS, RESPECTIVELY.
- Record URL:
-
Supplemental Notes:
- 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:
- Majidzadeh, Kamran
- Herrin, Moreland
- Publication Date: 1965
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References;
- Pagination: pp 98-121
- Monograph Title: Bituminous materials and mixes
-
Serial:
- Highway Research Record
- Issue Number: 67
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Asphalt; Bitumen; Bituminous mixtures; Crash investigation; Failure; Hydrodynamics; Laboratory tests; Potential energy; Specimens; Strength of materials; Stress (Psychology); Stresses; Studies; Surfacing; Temperature; Tensile properties; Tensile strength; Tension; Tests; Theory; Thickness; Thin films
- Uncontrolled Terms: Extension; Tensile; Tensile stress; Thin layers
- Old TRIS Terms: Control conditions
- Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; Materials; Safety and Human Factors;
Filing Info
- Accession Number: 00210530
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Dec 12 1994 12:00AM