M.S. Civil Engineering
Civil and Environmental Engineering
Henry M. Rowan College of Engineering
U.S. Department of Defense
Asphalt Mixtures, Fibers, Mix Design, Performance Testing
Civil and Environmental Engineering | Construction Engineering and Management
The purpose of this study is to evaluate the impact of fiber types, binder content, and dosage rates on the volumetric properties and laboratory performance of asphalt mixtures. One asphalt mixture (control) and four fiber types (Fiberglass, Basalt, Carbon, and Polyolefin/Aramid) were used to evaluate the impact of fiber types and dosage rates. Two mixing procedures for introducing fibers into asphalt mixtures were also evaluated: dry and proportional dispersion methods. To evaluate the impact of fiber types, 0.16% by total mix weight was used. Rutting, cracking, and durability performance tests were evaluated. Furthermore, using 0.15% and 0.3% fiber dosage rates, a novel experimental methodology was developed and implemented consisting of a volumetric mixture design and performance testing -(IDEAL-CT) and (APA)- to isolate the effects of fiber types and dosage rates from the effect of binder content. Results showed that 0.16% and 0.15% dosage rate had little to no impact on optimum binder content; whereas 0.3% dosage rate required an increase in binder content to meet volumetric requirements. Performance testing showed that 0.16% and 0.15% (regardless of fiber type) had little to no impact on cracking and rutting performance. All fiber types at 0.16% fiber dosage improved mixtures' durability. Using 0.3% dosage rate, only carbon fiber improved cracking performance without the use of additional binder.
Alfalah, Ahmad G. M., "Evaluation of impact of fiber type and dosage rate on volumetrics and laboratory performance of asphalt mixtures" (2020). Theses and Dissertations. 2846.