Investigation of Ultraviolet Ageing on Rheological Characteristics of Bitumen

2011 ◽  
Vol 71-78 ◽  
pp. 1954-1957
Author(s):  
Jian Ying Yu ◽  
Yong Sheng Liang ◽  
Zhen Gang Feng
Keyword(s):  
Low Temperature ◽  
Phase Angle ◽  
Low Temperatures ◽  
Complex Modulus ◽  
Rheological Parameters ◽  
Rheological Characteristics ◽  
Dynamic Shear ◽  
Dynamic Shear Rheometer ◽  
Uv Ageing ◽  
Rheometer Test

The influence of ultraviolet (UV) ageing on complex modulus, phase angle and low-temperature fatigue factor was studied by dynamic shear rheometer test. The ageing degree of the bitumen was evaluated by the rheological parameters. The results show that UV ageing causes an increase in complex modulus and fatigue factor, as well as a decrease in phase angle, indicating that the bitumen becomes more elastic after UV ageing process and is apt to crack at low temperatures. Different bitumen exhibits diverse changes in the rheological parameters after UV ageing, which is much dependent on the sources of bitumen.

An Alternative Experimental Method for Measuring the Low Temperature Rheological Properties of Asphalt Binder by Using 4mm Parallel Plates on Dynamic Shear Rheometer

2019 ◽  
Vol 2673 (3) ◽  
pp. 427-438 ◽  
Author(s):  
Di Wang ◽  
Augusto Cannone Falchetto ◽  
Alexander Alisov ◽  
Johannes Schrader ◽  
Chiara Riccardi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Rheological Properties ◽  
Experimental Method ◽  
Complex Modulus ◽  
Testing Procedure ◽  
Asphalt Binders ◽  
Rheological Parameters ◽  
Parallel Plates ◽  
Dynamic Shear ◽  
Dynamic Shear Rheometer

The possibility of using the dynamic shear rheometer (DSR) with 4 mm parallel plates and 3 mm gap is investigated as an alternative experimental method to measure the rheological properties of asphalt binders at low temperature. A special butterfly silicone mold was prepared for this purpose and the corresponding testing procedure was also developed. Five different asphalt binders, which are part of two active research projects, were selected. Frequency and temperature sweep tests were conducted using the DSR with three plate–plate geometries: 4 mm, 8 mm, and 25 mm. The new testing procedure was used to measure at low temperatures. The method recently proposed by the Western Research Institute and based on DSR tests with 4 mm parallel plates and 1.75 mm gap was also used for comparison purposes. Black diagrams and Cole-Cole plots were then used to evaluate the experimental data. Complex modulus and phase angle master curves were generated, and the rheological parameters compared. Finally, the two spring, two parabolic elements, one dashpot (2S2P1D) model was selected to investigate the rheological properties of the binders. Results indicate that the proposed procedure is a simple and reliable experimental method and represents an alternative experimental option to measure and analyze the rheological properties of asphalt binders at low temperature.

Comparison of rheological parameters of asphalt binders obtained from bending beam rheometer and dynamic shear rheometer at low temperatures

2015 ◽  
Vol 16 (sup1) ◽  
pp. 211-227 ◽  
Author(s):  
Jean-Claude Carret ◽  
Augusto Cannone Falchetto ◽  
Mihai O. Marasteanu ◽  
Hervé Di Benedetto ◽  
Michael P. Wistuba ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Asphalt Binders ◽  
Rheological Parameters ◽  
Dynamic Shear ◽  
Dynamic Shear Rheometer ◽  
Bending Beam Rheometer

Effect of Ageing on Rheological Properties of Asphalt

2021 ◽  
Vol 891 ◽  
pp. 185-189
Author(s):  
Li Xing Ma
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Rheological Properties ◽  
Complex Modulus ◽  
Dynamic Shear ◽  
Dynamic Shear Rheometer ◽  
Field Behavior ◽  
Aged Asphalt ◽  
Actual Field

This paper is to study the mechanism of aging on the rheological properties of the asphalt and make correlations with the actual field behavior of the binder. The effects of ageing on rheological properties of asphalt has been studied by Dynamic Shear Rheometer(DSR). Significant differences of rheological properties and composition were observed between fresh and aged asphalt. The results show that aging at low temperature increases the complex modulus of asphalt, but has little effect at high temperature.

scholarly journals Evaluation of Rheological Characteristics of Graphite Modified Bitumen

2021 ◽  
Vol 11 ◽  
pp. 51-57
Author(s):  
Odunayo Olayemi Oladunjoye ◽  
Olugbenga Joseph Oyedepo ◽  
Ebenezer Omoniyi Olukanni ◽  
Sombo Philiph Akande
Keyword(s):  
Shear Modulus ◽  
Phase Angle ◽  
Dynamic Viscosity ◽  
Loss Modulus ◽  
Rheological Parameters ◽  
Dynamic Shear ◽  
Complex Shear Modulus ◽  
Modified Bitumen ◽  
Dynamic Shear Rheometer ◽  
Complex Shear

The level of performance of asphalt concrete has a close relationship with the properties of bitumen used. This research evaluates the rheological parameters of graphite modified bitumen. Index properties tests were conducted on bitumen and graphite to determine their suitability. Dynamic viscosity and dynamic shear rheometer were conducted on bituminous binder modified with four different proportion of graphite ranging from 2% to 10% by bitumen weight. Dynamic viscosity test was conducted on bitumen and graphite modified bitumen at temperature of 1350C and 1650C using Brookfield Viscometer. The rheological properties are centered on phase angle (δ) and complex shear modulus (G*) which were determined on bitumen and graphite modified bitumen at temperature ranging from 520C – 700C at 10 rad/s frequency using Dynamic Shear Rheometer in accordance with ASTM D7175-15. The storage modulus (G'), loss modulus (G") and rutting parameters were then evaluated from phase angle and complex shear modulus. The bitumen and graphite modified bitumen showed that graphite modified bitumen has the highest complex shear modulus and rutting parameter of 8984 (kPa) and 33387 (kPa) at 10% graphite content. The results of viscosity helped to determine the mixing and compaction temperatures. Dynamic shear rheometer test results determined the elastic and viscous behaviour at various temperature. The higher the complex shear modulus and rutting parameter the stiffer the binder will resist deformation and rutting.

Low-Temperature Emulsion Performance-Graded Specification for Chip Seals

2018 ◽  
Vol 2672 (28) ◽  
pp. 266-276
Author(s):  
Cassie Castorena ◽  
Mohammad Ilias ◽  
Javon Adams ◽  
Y. Richard Kim
Keyword(s):  
Low Temperature ◽  
Phase Angle ◽  
Low Temperatures ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Asphalt Emulsion ◽  
Chip Seal ◽  
Critical Phase ◽  
Chip Seals ◽  
Aggregate Loss

Chip seals are applied to existing roadways to slow deterioration and improve pavement surface conditions without increasing the pavement’s structural capacity. Chip seals typically are comprised of asphalt emulsion and aggregate. Although it is well known that the properties of asphalt emulsion are critical to chip seal performance, the current specifications for these binders are empirical in nature and are not based on the properties that relate directly to chip seal performance. This study proposes emulsion performance-graded specifications that are designed to mitigate aggregate loss at low temperatures. To develop the proposed specifications, the research team executed an experimental plan to identify the residual binder properties that relate to chip seal aggregate loss at low temperatures. This research considered both fracture mechanics and rheology-based binder properties. Dynamic shear moduli, evaluated at critical phase angle values, demonstrated the strongest correlation to chip seal aggregate loss at low temperatures. Critical phase angle values were varied as a function of the low-temperature climatic emulsion performance grade of interest. This study also established preliminary specification limits for the dynamic shear modulus values based on critical chip seal performance thresholds.

Rheological Characteristics of Residue Binder from Low Penetration Grade Bitumen Emulsion

2012 ◽  
Vol 509 ◽  
pp. 328-332 ◽  
Author(s):  
Guang Ji Xu ◽  
Mei Zhu Chen ◽  
Shao Peng Wu ◽  
Martin Van de Ven ◽  
Steven Mookhoek
Keyword(s):  
Phase Angle ◽  
Large Range ◽  
Complex Modulus ◽  
Rheological Characteristics ◽  
Curing Process ◽  
Master Curves ◽  
Recovery Method ◽  
Stabilization Process ◽  
Bitumen Emulsion ◽  
Three Stages

In this study, residue binders from low penetration grade bitumen emulsions were investigated on the basis of rheology and were compared to the neat bitumen binders of which they were produced. The recovery method proposed by EN 13074 (including both recovery and stabilization process at moderate temperatures) was selected to obtain the residue binders used in the analysis, and the corresponding neat binders were treated the same for comparison. The rheological properties of residue binder from low penetration grade bitumen emulsion were evaluated using Dynamic Shear Rheometer (DSR). During the curing process, three stages were divided, and master curves of complex modulus and phase angle were constructed to allow comparison of the residue binder over a large range of frequencies for each stage. The results showed that the complex modulus increases while the phase angle decreases with curing process for the residues, indicating a better performance in terms of elasticity and stiffness.

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