TY - JOUR
T1 - Assessment of the Impact of Fiber Types on the Performance of Fiber-Reinforced Hot Mix Asphalt
AU - Alfalah, Ahmad
AU - Offenbacker, Daniel
AU - Ali, Ayman
AU - Decarlo, Christopher
AU - Lein, Wade
AU - Mehta, Yusuf
AU - Elshaer, Mohamed
N1 - Funding Information:
The work described in this paper was conducted at Rowan University?s Center for Research and Education in Advanced Transportation Engineering Systems (CREATEs), Mullica Hill, NJ. Permission was granted by the Director, Geotechnical and Structures Laboratory to publish this information. Special thanks are also because of Keith Sterling and fiber manufacturers for providing the materials that were used in this study. The author(s) received the following financial support for the research, authorship, and/or publication of this article: The experiments described and the resulting data presented in the article, unless otherwise noted, were funded under PE 0602784A, Project T53 ?Military Engineering Applied Research,? Task 08 under Contract W913E518C0008, managed by the U.S. Army Engineer Research and Development Center (ERDC).
Publisher Copyright:
© National Academy of Sciences: Transportation Research Board 2020.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020/4
Y1 - 2020/4
N2 - This study aims to evaluate the impact of fiber types on the performance of hot mix asphalt (HMA) mixtures. Specifically, the impacts of fiber type on HMA mix design and laboratory performance are investigated. Four types of fiber (fiberglass, basalt, carbon, and polyolefin/aramid blend) were used to produce four fiber-reinforced HMA mixes, and a control mix without fibers was also prepared. The fiber dosage rates used in this study were 0.16% (fiberglass, basalt, and carbon) and 0.05% (polyolefin/aramid) by total mixture weight, based on manufacturer recommendations. Two mixing procedures for introducing fibers into HMA were also evaluated: dry and 15-s dispersion methods. The dry method involved mixing the fibers with aggregates before the addition of asphalt binder while the 15-s dispersion method involved adding the fibers into the mix every 15 seconds (as aggregates were coated by asphalt binder during the mixing process). All the HMA mixtures (unreinforced and fiber-reinforced) were then subjected to several different laboratory performance tests: dynamic complex modulus, Cantabro durability, asphalt pavement analyzer, flow number, and indirect tensile strength. Analysis of variance was conducted to evaluate statistically the impact of fibers on mix performance. Results showed that fibers affected the volumetric properties, mix durability, and rutting resistance of HMA mixes. It was also found that the process for introducing fibers into the mix (i.e., mixing method) affected the consistency of fiber-reinforced HMA samples. Overall, the results of this study showed that the use of fibers improved the rutting and durability performance of asphalt mixtures in the laboratory.
AB - This study aims to evaluate the impact of fiber types on the performance of hot mix asphalt (HMA) mixtures. Specifically, the impacts of fiber type on HMA mix design and laboratory performance are investigated. Four types of fiber (fiberglass, basalt, carbon, and polyolefin/aramid blend) were used to produce four fiber-reinforced HMA mixes, and a control mix without fibers was also prepared. The fiber dosage rates used in this study were 0.16% (fiberglass, basalt, and carbon) and 0.05% (polyolefin/aramid) by total mixture weight, based on manufacturer recommendations. Two mixing procedures for introducing fibers into HMA were also evaluated: dry and 15-s dispersion methods. The dry method involved mixing the fibers with aggregates before the addition of asphalt binder while the 15-s dispersion method involved adding the fibers into the mix every 15 seconds (as aggregates were coated by asphalt binder during the mixing process). All the HMA mixtures (unreinforced and fiber-reinforced) were then subjected to several different laboratory performance tests: dynamic complex modulus, Cantabro durability, asphalt pavement analyzer, flow number, and indirect tensile strength. Analysis of variance was conducted to evaluate statistically the impact of fibers on mix performance. Results showed that fibers affected the volumetric properties, mix durability, and rutting resistance of HMA mixes. It was also found that the process for introducing fibers into the mix (i.e., mixing method) affected the consistency of fiber-reinforced HMA samples. Overall, the results of this study showed that the use of fibers improved the rutting and durability performance of asphalt mixtures in the laboratory.
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U2 - 10.1177/0361198120912425
DO - 10.1177/0361198120912425
M3 - Article
AN - SCOPUS:85085968004
VL - 2674
SP - 337
EP - 347
JO - Transportation Research Record
JF - Transportation Research Record
SN - 0361-1981
IS - 4
ER -