A5101889161- Asphalt Pavement Performance Evaluation
- Infrastructure Maintenance and Monitoring
- Polymer Nanocomposites and Properties
- Polymer Synthesis and Characterization
- Polymer composites and self-healing
- Structural mechanics and materials
- Innovative concrete reinforcement materials
Iowa State University
2023-2025
Bissell (United States)
2024
Ames National Laboratory
2024
Bitumen, a crucial component of asphalt pavements, exhibits complex chemical properties that influence its performance. Traditional methods for separating bitumen into saturate, aromatic, resin, and asphaltene (SARA) fractions often suffer from limitations such as low efficiency insufficient sample recovery. Here, we present novel approach using flash chromatography to address these challenges. Our automated technique offers rapid efficient separation fractions, enabling comprehensive...
The use of crosslinking agents, particularly sulfur, addresses compatibility issues in Polymer-modified binders (PmB), impacting storage stability and rheological properties. Through comprehensive assessments, including Superpave grading advanced techniques such as Glover-Rowe, master curves, Arrhenius Power-law models, this study aimed to provide a deeper understanding the role sulfur agent between asphalt styrene-butadiene copolymer (SB), investigating its influence on durability...
Cracked and deteriorated asphalt are common problems on our roads, leading to safety concerns requiring significant resources for rehabilitation reconstruction. This study investigates bio-fog seals, a promising eco-friendly solution utilizing bio-based rejuvenators. These treatments penetrate aged asphalt, restoring its flexibility resistance cracking. We assessed the effectiveness of two seal formulations—one containing sub-epoxidized soybean oil (SESO) other combining SESO with biopolymer...
Crosslinking agents, notably sulfur, are used in asphalt binder modification to facilitate chemical bonding between polymer chains and the binder. Despite some prior research indicating benefits of sulfur crosslinking enhancing polymer-modified asphalt’s (PMA) stability, there is a lack comprehensive understanding regarding its impact on rheological properties anti-aging potential. This study addresses these gaps by thoroughly investigating effects varying content (ranging from 0.03% 0.5%...
The polymer modification of asphalt binders was first introduced in Europe the 1980s and has gained use, as lower-quality did not perform well under increasingly heavier traffic loading on pavements. influence chemical cross-linkers such sulfur rheological, morphological, aging characteristics polymer-modified (PMA) binder been experimentally examined. PMAs were prepared, blending different contents (0.03, 0.1, 0.3, 0.5% by wt. binder) with a neat binder. samples aged rolling thin film oven...