RHEOLOGICAL PERFORMANCE OF AGED POLYMER MODIFIED BITUMENS
The rheological and chemical changes associated with laboratory short term and long term aging of modified, penetration grade, bitumens are well know and understood. However, these changes are not fully understood for polymer modified bitumens (PMB's). The rheological changes that occurred after aging for three base bitumens and fifteen PMB's using conventional binder specification tests (Penetration, Softening Point and viscosity) and a dynamic mechanical test (Dynamic Shear Rheometer) were measured. The conventional tests were able to describe the effect of aging on the rheological responses to aging compared with the penetration grade bitumens. The Dynamic Shear Rheometer results indicated that the changes that occur after aging for EVA modified PMB's can be linked to a chemical change in the semi-crystalline copolymer with a shifting of the rheological characteristics of the aged PMB towards that of an unmodified bitumen. The rheological changes associated with the SBS modified PMB's can be linked to a breakdown of the molecular structure of the copolymer to form a lower molecular weight polymer substructure.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/02702932
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Corporate Authors:
Association of Asphalt Paving Technologists (AAPT)
400 Selby Avenue, Suite I
St Paul, MN United States 55102 -
Authors:
- Airey, G D
- BROWN, S F
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Conference:
- Asphalt Paving Technology 1998
- Location: Boston, Massachusetts
- Date: 1998-3-16 to 1998-3-18
- Publication Date: 1998
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 66-100
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Serial:
- Journal of the Association of Asphalt Paving Technologists
- Volume: 67
- Publisher: Association of Asphalt Paving Technologists (AAPT)
- ISSN: 0270-2932
- Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109
Subject/Index Terms
- TRT Terms: Bitumen; Penetration resistance; Polymers; Rheological properties; Ship dynamic stability; Viscosity
- Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 00758868
- Record Type: Publication
- Files: TRIS, ATRI
- Created Date: Jan 21 2001 12:00AM