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Evaluating Four-Point Bend Fatigue of Asphalt Mix Using Image Analysis
Author(s)
Date Issued
2004-02
Date Available
2013-10-02T08:52:51Z
Abstract
One of the primary structural distress modes found in bituminous pavement layers is fatigue cracking, resulting from repeated application of traffic-induced stresses. The development of a four-point bending test arrangement to determine the dynamic mechanical properties of rectangular beam specimens (305×45×50mm dimensions) of bituminous mixtures is discussed. This novel system allows the crack-damaged surfaces of beam specimens to be inspected and monitored digitally in situ during fatigue tests. The test fixture, which was integrated with a closed-loop servo hydraulic feedback system, incorporates a constant clamping mechanism and uses a combined displacement and loading mode of control. A series of four-point bending fatigue tests were performed on specimens of two standard Irish mixtures: a hot rolled asphalt and dense base course macadam. The digitally imaged information on fatigue cracking was used to measure the extent of damage and to characterize a linear elastic fracture mechanics model.
Type of Material
Journal Article
Publisher
American Society of Civil Engineers
Journal
Journal of Materials in Civil Engineering
Volume
16
Issue
1
Start Page
60
End Page
68
Copyright (Published Version)
2004 American Society of Civil Engineers
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
File(s)
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Name
Paper_4PBfixture_JME_2X (Send as PDF) done.pdf
Size
222.97 KB
Format
Adobe PDF
Checksum (MD5)
e353f0415864a090372c4c43c048a3ef
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