The influence of moisture on the aging characteristics of bitumen

The influence of moisture on the ageing characteristics of bitumens was examined by studying the rheological and chemical properties of bitumens aged in the absence or presence of water in a pressure aging vessel (PAV). Eight different bitumens were rolling thin film oven (RTFO) aged using standard procedures and then PAV aged at 80degreesC with and without moisture present for 144, 240, and 480h. The rheological properties of the RTFO- and RTFO/PAV-aged bitumens were studied as a function of oxidative aging time and the presence or absence of water. Master curves were constructed by shifting the aging time-frequency data to assist in the interpretation. The results showed that the effect of moisture on the aging characteristics of the bitumens is bitumen-source dependent. The stiffness of some bitumens decreases in the presence of moisture in the PAV aging process; while the stiffness of others increases. Chemical analyses obtained from infrared spectroscopy were also correlated with physical properties of the eight bitumens. The results suggest that water disrupts the colloidal structure of bitumen molecules during the oxidative aging process. For the covering abstract see ITRD E157233

• Authors:
  • HUANG, SHIN-CHE
  • TURNER, T F
  • THOMAS, K P
• Publication Date: 2008

Language

• English

Media Info

• Pagination: 9p
• Serial:
  • PROCEEDINGS OF THE 4TH EURASPHALT AND EUROBITUME CONGRESS HELD MAY 2008, COPENHAGEN, DENMARK
  • Publisher: EUROPEAN ASPHALT PAVEMENT ASSOCIATION (EAPA)

Subject/Index Terms

• TRT Terms: Aging (Materials); Bitumen; Chemical analysis; Conferences; Moisture content; Pressure; Properties of materials; Rheology
• ITRD Terms: 5292: Ageing; 4963: Bitumen; 7163: Chemical analysis; 8525: Conference; 5920: Moisture content; 5412: Pressure; 5925: Properties; 5442: Rheology
• Subject Areas: Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01336616
• Record Type: Publication
• Source Agency: TRL
• Files: ITRD
• Created Date: Apr 15 2011 4:09PM