A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
INTERPRETING ASPHALT BINDER MULTIPLE STRESS CREEP AND RECOVERY PROPERTIES USING VISCOELASTIC RH OGICAL
This paper investigates the intermediate and high temperature rheological properties of asphalt binder on Dynamic Shear Rheometer (DSR) using Multiple Stress Creep and Recovery (MSCR) test. For comparison, intermediate and high temperature measurements were also carried out using Frequency Sweep Test (FST). Evaluation of two unmodified asphalt binder is presented: 40/50 and 60/70 pen grade. In general, the 40/50 pen binder resulted in higher viscoelastic properties and resulted in higher resistance to shear deformation as compared to 60/70 pen. For the binders evaluated, the 100 Pa shear stress level in MSCR test was chosen because it is within the Linear Viscoelastic (LVE) range and therefore the measurements at this stress was used to characterize the fundamental viscoelastic properties of asphalt binders. The four element Burgers model was utilized to estimate the storage and loss modulus values. Statistical analysis was conducted to objectively evaluate the accuracy of the estimated viscoelastic properties. The estimated shear strain value satisfactorily matches the measure one. The Burgers model parameters were found to be suitable and adequate for describing the creep and recovery viscoelastic properties of the asphalt binders included in the study. The shear modulus master curves derived from MSCR and FST test methods were compared and remarkably good agreement was obtained. Overall, the viscoelastic properties of asphalt binders can be captured on the basis of MSCR measurements within the LVE range. The MSCR test method is a simple, quick, and economical test method as compared to the FST test method for characterizing the creep recovery elastic and viscoelastic properties of asphalt binders.
INTERPRETING ASPHALT BINDER MULTIPLE STRESS CREEP AND RECOVERY PROPERTIES USING VISCOELASTIC RH OGICAL
This paper investigates the intermediate and high temperature rheological properties of asphalt binder on Dynamic Shear Rheometer (DSR) using Multiple Stress Creep and Recovery (MSCR) test. For comparison, intermediate and high temperature measurements were also carried out using Frequency Sweep Test (FST). Evaluation of two unmodified asphalt binder is presented: 40/50 and 60/70 pen grade. In general, the 40/50 pen binder resulted in higher viscoelastic properties and resulted in higher resistance to shear deformation as compared to 60/70 pen. For the binders evaluated, the 100 Pa shear stress level in MSCR test was chosen because it is within the Linear Viscoelastic (LVE) range and therefore the measurements at this stress was used to characterize the fundamental viscoelastic properties of asphalt binders. The four element Burgers model was utilized to estimate the storage and loss modulus values. Statistical analysis was conducted to objectively evaluate the accuracy of the estimated viscoelastic properties. The estimated shear strain value satisfactorily matches the measure one. The Burgers model parameters were found to be suitable and adequate for describing the creep and recovery viscoelastic properties of the asphalt binders included in the study. The shear modulus master curves derived from MSCR and FST test methods were compared and remarkably good agreement was obtained. Overall, the viscoelastic properties of asphalt binders can be captured on the basis of MSCR measurements within the LVE range. The MSCR test method is a simple, quick, and economical test method as compared to the FST test method for characterizing the creep recovery elastic and viscoelastic properties of asphalt binders.
INTERPRETING ASPHALT BINDER MULTIPLE STRESS CREEP AND RECOVERY PROPERTIES USING VISCOELASTIC RH OGICAL
SAMRAWIT GETAHUN (author) / Habtamu Melese (Ph.D, PE) (author)
2018-01-01
doi:10.20372/nadre:1548578603.67
Theses
Electronic Resource
English
DDC:
621
Use of Multiple Stress Creep Recovery Test to Evaluate Viscoelastic Properties of Asphalt Mastic
| Springer Verlag | 2021