Zero Shear Viscosity of Bitumen-Filler Mastics
- 1 December 2011
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Materials in Civil Engineering
- Vol. 23 (12), 1672-1680
- https://doi.org/10.1061/(asce)mt.1943-5533.0000331
Abstract
There has been an increasing awareness of the role of zero shear viscosity (ZSV) of bituminous binders as performance indicators of resistance to permanent deformation of asphalt mixtures because in some cases the conventional criteria for binders do not get reflected in asphalt pavement rutting performance. The aim of this paper is to analyze the zero shear viscosities of bitumen and bitumen-filler mastics with three different levels of limestone filler concentrations on the basis of two viscosity measurement techniques by using a dynamic shear rheometer (DSR). The empirical Cox-Merz rule is used to examine the viscosity correlation between dynamic oscillatory and rotational viscometry measurements. The straight-run penetration grade bitumen and limestone bitumen-filler mastics containing low (15%) and intermediate (35%) filler content by mass obey the Cox-Merz rule, whereas the high filler content (65%) mastic shows a divergence in two types of viscosity measurements. The ZSVs of the bitumen and bitumen-filler mastics at 40°C and 60°C are determined by estimating from the two types of viscosity measurements at zero shear conditions on the basis of the Cross model calculation. In the ZSV stiffening ratios, the 65% limestone bitumen-filler mastic shows a considerable increase in stiffening effect compared with both the base bitumen and the other two mastics. With regard to the comparison with the rutting indicators, a significantly greater ZSV stiffening ratio shows that the two conventional rutting criteria at 0.4 Hz and at 1.6 Hz are underestimated.
Keywords
This publication has 12 references indexed in Scilit:
- Determination of zero shear viscosity of warm asphalt bindersConstruction and Building Materials, 2009
- Comparison of methods for measuring zero shear viscosity in asphaltsMaterials and Structures, 2009
- Influence of surface interactions between bitumen and mineral fillers on the rheology of bitumen-filler masticsPublished by Taylor & Francis Ltd ,2008
- Dynamic mechanical testing of bitumen: sample preparation methodsProceedings of the Institution of Civil Engineers - Transport, 2003
- Do Asphalt Mixtures Correlate Better with Mastics or Binders in Evaluating Permanent Deformation?Transportation Research Record: Journal of the Transportation Research Board, 2003
- Rheological characterisation of synthetic binders and unmodified bitumensFuel, 1999
- Rheology of Filled Polymer SystemsPublished by Springer Science and Business Media LLC ,1999
- Zero-Shear Viscosity of Bituminous Binder and Its Relation to Bituminous Mixture's Rutting ResistanceTransportation Research Record: Journal of the Transportation Research Board, 1996
- Rheology of non-Newtonian fluids: A new flow equation for pseudoplastic systemsJournal of Colloid Science, 1965
- Correlation of dynamic and steady flow viscositiesJournal of Polymer Science, 1958