Relation between zero shear viscosity and zero frequency complex viscosity at different temperatures

There are exchangeable uses between zero shear rate viscosity and zero frequency complex viscosity. However, these values are no mean similar as zero shear rate viscosity presents the resistance to flow of bitumen and zero frequency complex viscosity for the viscoelastic properties. To compare these values, three types of straight-run bitumen, 70/100, 100/150, 160/220 Pen, one artificially aged binder, and four bitumen-filler mastics are tested under viscometry and dynamic oscillation condition at 20, 40, and 60degreesC. The bitumen-filler mastics are made from bitumen 40/60 Pen, cement or gritstone filler with 35 and 65% by mass. Zero shear viscosity values (ZSV) are extrapolated from viscometry and dynamic oscillation data by using Cross model with the help of Matlab software. The comparison between these values shows that at high temperatures, 60degreesC for instance, extrapolated ZSV values from viscometry and dynamic oscillation are almost the same. However, at medium and low temperatures, these values are quite different. Especially with stiff bitumen and bitumen-filler mastics, ZSV from viscometry data is considerably higher than that from dynamic oscillation data. This is due to the difference in test configuration. In oscillation test, the strain is controlled to ensure material working in viscoelastic regime. On the contrary, unlimited strain in viscometer test might cause the higher rate of fluidity loss as the material performs under viscoplastic manner. This results in higher extrapolated ZSV. For the covering abstract see ITRD E144473.

• Authors:
  • NGUYEN, V H
  • AIREY, G
  • LIAO, M C
• Publication Date: 2008

Language

• English

Media Info

• Serial:
  • PROCEEDINGS OF THE 3RD EUROPEAN PAVEMENT & ASSET MANAGEMENT CONFERENCE (EPAM3) 7-9 JULY 2008, COIMBRA ,PORTUGAL

Subject/Index Terms

• TRT Terms: Bitumen; Conferences; Frequency (Electromagnetism); Mastic asphalt; Properties of materials; Shear strength; Viscosity
• ITRD Terms: 4963: Bitumen; 8525: Conference; 6997: Frequency; 5925: Properties; 5531: Shear; 5936: Viscosity
• Subject Areas: Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01323349
• Record Type: Publication
• Source Agency: TRL
• Files: ITRD
• Created Date: Dec 22 2010 8:47AM