Experimental evaluation of asphalt binders high specification temperature based on the low-shear viscosity concept

Over the past few years different theoretical concepts and experimental approaches have been proposed in order to revise G*/sin delta as high temperature performance indicator. Zero-shear viscosity was considered a possible specification parameter and different experimental methodologies to determine it were evaluated. In any case, as previous experiences have shown, several difficulties arise when test procedures are applied to polymer modified binders. Despite this fact, creep and oscillatory tests at low frequency can highlight the influence of polymer concentration on the mechanical behavior of bitumen; at the same time, a methodology for determining equiviscous temperatures based on a low frequency approach was proposed for European standardization by CEN TC 336. The experience presented in this paper aims at establishing rheometrical conditions for evaluating high specification temperatures of bitumen based on viscosity measurements at limiting conditions (low-shear viscosity concept). During the experimental program carried out, static and dynamic mechanical analyses in the low frequency domain were performed and the influence of rheometrical approach on tests results was evaluated. Both modified and unmodified binders were selected for the investigation and the behaviors observed were analyzed by means of different rheological models. For the covering abstract see ITRD E157233

• Authors:
  • GIULIANI, F
  • MERUSI, F
• Publication Date: 2008

Language

• English

Media Info

• Pagination: 11p
• 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: Bituminous materials; Bituminous mixtures; Conferences; Instruments for measuring fluid properties or phenomena; Mathematical models; Polymers; Properties of materials; Rheological properties; Rheometers; Temperature
• ITRD Terms: 4955: Bituminous materials; 4967: Bituminous mixture; 8525: Conference; 6473: Mathematical model; 7482: Polymer; 5925: Properties; 6138: Rheometer; 6722: Temperature
• Subject Areas: Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01321233
• Record Type: Publication
• Source Agency: TRL
• Files: ITRD
• Created Date: Nov 29 2010 10:52AM