FATIGUE AND HEALING CHARACTERISTICS OF BITUMENS STUDIED USING DYNAMIC SHEAR RHEOMETER

This paper characterizes the fatigue and healing behavior of bitumen using a dynamic shear rheometer (DSR). Different types of bitumen, before and after aging, were investigated in strain- and stress-controlled modes. Procedures of storage recuperation and intermittent loading were used to determine the effect of healing on bitumen fatigue. The results indicated that, at sufficiently high stiffness, bitumen exhibited fatigue, observe by a progressive decrease in complex modulus (G*) with load applications. The fatigue life was dependent on load amplitude, and in a log-log plot, straight lines were obtained. After oxidative aging, the slope of fatigue line may increase. Regarding the effect of rest periods (healing) on fatigue, it was found that bitumens differed widely both in strain-controlled and stress-controlled tests. In the strain-controlled fatigue and storage recuperation tests, recovery of the stiffness was not reflected in an extension of the fatigue life. In the stress-controlled tests using intermittent loading, the minimum ratio of rest time versus loading time for a significant benefit to fatigue life was found to vary from half to 10 between the bitumens studied. For the covering abstract see ITRD E117423.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/2912143357
• Corporate Authors:

  RILEM PUBLICATIONS S.A.R.L

  157 RUE DES BLAINS
  BAGNEUX,   France  F-92220
• Authors:
  • Lu, Xiaochun
  • Soenen, H
  • Redelius, P
• Conference:
  • PERFORMANCE TESTING AND EVALUATION OF BITUMINOUS MATERIALS PTEBM'03. PROCEEDINGS OF THE 6TH INTERNATIONAL RILEM SYMPOSIUM HELD ZURICH, SWITZERLAND, 14-16 APRIL 2003
• Publication Date: 2003

Language

• English

Media Info

• Features: References;
• Pagination: p. 408-15

Subject/Index Terms

• TRT Terms: Aging (Materials); Bitumen; Conferences; Fatigue (Mechanics); Rheology
• ITRD Terms: 5292: Ageing; 4963: Bitumen; 8525: Conference; 5579: Fatigue (mater); 5442: Rheology
• Subject Areas: Data and Information Technology;

Filing Info

• Accession Number: 00943383
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 2-912143-35-7
• Files: ITRD, ATRI
• Created Date: Jun 11 2003 12:00AM