A5050416485- Asphalt Pavement Performance Evaluation
- Infrastructure Maintenance and Monitoring
- Innovative concrete reinforcement materials
- Transport Systems and Technology
- Polymer Nanocomposites and Properties
- Petroleum Processing and Analysis
- Material Properties and Failure Mechanisms
- Geotechnical Engineering and Underground Structures
University of California, Davis
2019-2024
ORCID
2020
California Department of Transportation
2020
Oxidative aging is caused by oxygen diffusion into the binder when an asphalt pavement exposed to atmosphere. Aging can lead increased susceptibility damage (i.e., raveling, cracking, and moisture damage). Investigation of mechanism advances understanding these distresses, prediction progress improves structural design performance. Previous studies have proposed a dual-rate model that divides short, fast-rate phase long constant phase. This paper further investigates rate unmodified, polymer...
Rejuvenators are used to restore the properties of reclaimed asphalt pavement (RAP) binders through readjusting balance between asphaltene and maltene fractions. To properly understand effect rejuvenators, it is important analyze chemical changes in rejuvenated relate these rheological binders. In this study, RAP were blended with a bio-based an aromatic extract petroleum-based rejuvenator additive. Chemical thermal techniques, such as differential scanning calorimetry (DSC), attenuated...
The California Department of Transportation has proposed to add a low amount crumb-rubber modifier into dense-graded asphalt mixes, in addition current policies using gap- and open-graded mixes with high content rubber (around 20% by weight binder) as the surface layers. objectives are reduce landfill disposal scrap tires obtain equal or better performance compared containing unmodified binders. This paper investigated new type rubberized mix 5% 10% modifier. binder were at same grade meet...
This paper evaluates the mechanical properties of rubberized asphalt binder and mix containing 5% 10% rubber. was manufactured in a field-blend process using devulcanized rubber particles, finer than 250 microns, derived from waste tires. Comparison between base test results showed that binders had higher complex moduli lower phase angles at grade temperature. They also percentage recovery multiple stress creep test, significant stiffness reduction bending beam rheometer test. Given low...
Author(s): Jones, David; Rizvi, Hashim Raza; Liang, Yanlong; Hung, Shawn; Buscheck, Jeffrey; Alavi, Mohammad Zia; Hofko, Bernhard | Abstract: In the United States, Superpave Asphalt Binder Performance Grading (PG) system proposed by Strategic Highway Research Program (SHRP) is most common method used to characterize performance-related properties of unmodified and polymer-modified asphalt binders. Dynamic shear modulus (G*) phase angle (δ) are two main binder they measured using a dynamic...
This paper studies the relationship between laboratory measurements of fatigue performance and fracture conventional asphalt mixtures, mixtures with reclaimed pavement (RAP), rubberized mixtures. The existing four-point bending (4PB) test was developed to evaluate pavements; however, it is not necessarily appropriate for use in routine job mix formula approval too slow expensive quality control/quality assurance (QC/QA). In this paper, semi-circular indirect tensile cracking (IDEAL-CT) were...