Technical Papers
Sep 23, 2023

Polyphosphoric Acid Modified Soybean Oil Bioasphalt: Rheological Properties and Modification Mechanism

Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 12

Abstract

A large amount of soybean oil (20%–30% mass ratio of neat asphalt) was selected to partially replace petroleum asphalt. The high-temperature behavior of soybean oil bioasphalt was enhanced by polyphosphoric acid (PPA). Polyphosphoric acid/soybean oil composite modified asphalt (PSMA) was prepared. Temperature sweep, frequency sweep, multiple stress creep recovery, and bending beam rheometer tests were conducted to reveal the rheological behavior. Fourier infrared spectroscopy (FTIR), scanning electron microscope, and fluorescence microscope tests were carried out to reveal its microstructure characteristic. The results proved that polyphosphoric acid obviously increased the high-temperature properties of soybean oil bioasphalt. Compared with the neat asphalt at 0.1 kPa, the recovery rates of 20% bio/6% PPA, 25% bio/6% PPA, and 30% bio/6% PPA increased by 139.2%, 113.5%, and 86.4% respectively. PSMA was less sensitive to temperature and loading frequency, with remarkable elastic recovery and antirutting degeneration ability. PSMA could maintain excellent low-temperature crack resistance at 18°C. PSMA had better rheological properties when soybean oil and PPA were 20%–25% and 4%–6%, respectively. The FTIR tests verified that some new functional groups emerged in PSMA. There were evenly distributed fluorescent materials in the soybean oil bioasphalt under the fluorescence microscope. Under the modification effect of PPA, soybean oil and PPA could be evenly dispersed in PSMA. Laboratory tests verified the superior properties of bioasphalt with high content soybean oil.

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Data Availability Statement

Some or all data, models, or codes generated or used during the study are available from the corresponding author by request.

Acknowledgments

This manuscript is based upon work supported by the National Natural Science Foundation of China (Grant No. 52108398), the Open Fund of Key Laboratory of Special Environment Road Engineering of Hunan Province (Changsha University of Science & Technology) (Grant No. kfj210502), National Natural Science Foundation of China (52225806), National Natural Science Foundation of China (52078063), Science and Technology Project of Guangxi Zhuang Autonomous Region (AB20297030), the Natural Science Foundation of Hunan Province of China (2022JJ40484), Technological Innovation Projects of Enterprises in Wuhan (2019zkhx111 and 2020020602012145), and the Changsha University of Science & Technology’s practical innovation and entrepreneurial ability improvement plan (CLSJCX22021). Any opinions, findings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the funders.
Author contributions: Zihao Ju: conceptualization, methodology, resources, supervision, writing, review, and editing. Dongdong Ge: formal analysis, writing (original draft), and writing (review and editing). Songtao Lv: methodology, formal analysis, investigation, supervision, and writing (review and editing). Yuanbo Li: software, validation, and formal analysis. Guopeng Fan: visualization, writing-reviewing, and editing. Yanhua Xue: editing, investigation, and formal analysis.

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Go to Journal of Materials in Civil Engineering
Journal of Materials in Civil Engineering
Volume 35Issue 12December 2023

History

Received: Oct 4, 2022
Accepted: Apr 28, 2023
Published online: Sep 23, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 23, 2024

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Zihao Ju, Ph.D. [email protected]
Ph.D. Candidate, Key Laboratory of Special Environment Road Engineering of Hunan Province, National Engineering Research Center of Highway Maintenance Technology, Changsha Univ. of Science and Technology, Hunan 410114, China. Email: [email protected]
Professor, Key Laboratory of Special Environment Road Engineering of Hunan Province, National Engineering Research Center of Highway Maintenance Technology, Changsha Univ. of Science and Technology, Hunan 410114, China (corresponding author). ORCID: https://orcid.org/0000-0003-2890-6552. Email: [email protected]
Professor, Key Laboratory of Special Environment Road Engineering of Hunan Province, National Engineering Research Center of Highway Maintenance Technology, Changsha Univ. of Science and Technology, Hunan 410114, China. Email: [email protected]
Master’s Candidate, Key Laboratory of Special Environment Road Engineering of Hunan Province, National Engineering Research Center of Highway Maintenance Technology, Changsha Univ. of Science and Technology, Hunan 410114, China. Email: [email protected]
Guopeng Fan, Ph.D. [email protected]
Ph.D. Candidate, Key Laboratory of Special Environment Road Engineering of Hunan Province, National Engineering Research Center of Highway Maintenance Technology, Changsha Univ. of Science and Technology, Hunan 410114, China. Email: [email protected]
Yanhua Xue, Ph.D. [email protected]
Ph.D. Candidate, Key Laboratory of Special Environment Road Engineering of Hunan Province, National Engineering Research Center of Highway Maintenance Technology, Changsha Univ. of Science and Technology, Hunan 410114, China. Email: [email protected]

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