Evaluation of Resilience Parameters of Soybean Oil-Modified and Unmodified Warm-Mix Asphalts—A Way Forward towards Sustainable Pavements

Muhammad Akhtar Tarar, Ammad Hassan Khan, Zia ur Rehman, Wasim Abbass, Ali Ahmed, Elimam Ali, Mohamed Mahmoud Sayed and Mubashir Aziz
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Muhammad Akhtar Tarar: Department of Civil Engineering, The University of Lahore, Lahore 54000, Pakistan
Ammad Hassan Khan: Department of Transportation Engineering and Management, University of Engineering and Technology Lahore, Lahore 54890, Pakistan
Zia ur Rehman: Department of Transportation Engineering and Management, University of Engineering and Technology Lahore, Lahore 54890, Pakistan
Wasim Abbass: Department of Civil Engineering, University of Engineering and Technology Lahore, Lahore 54890, Pakistan
Ali Ahmed: Department of Civil Engineering, University of Engineering and Technology Lahore, Lahore 54890, Pakistan
Elimam Ali: Department of Civil Engineering, Prince Sattam Bin Abdul Aziz University, Al-Kharj 16273, Saudi Arabia
Mohamed Mahmoud Sayed: Department of Architecture, Faculty of Engineering and Technology, Future University, Cairo 11835, Egypt
Mubashir Aziz: Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

Sustainability, 2022, vol. 14, issue 14, 1-13

Abstract: The sustainable design and construction of highways is indispensable for the economic growth and progress of any region. Highway pavements are one of the core transportation infrastructures that require energy efficient materials with durability and an optimized lifecycle. Recent research has proven that warm-mix asphalt pavements prepared with renewable bio-binders are less susceptible to distresses. This study aims to investigate the resilience characteristics (load time, deformation time) of soybean oil modified and unmodified warm-mix asphalts. Aggregates, asphalt binders and asphalt mixes were characterized in accordance with the Superpave Mix Design Criteria. The resilient modulus tests were performed as per ASTM D7369. The test results indicated that the soybean-modified warm asphalt mix samples showed a 20% to 32% reduction in load-carrying capacity than unmodified warm asphalt mixes. The values of the horizontal and vertical recoverable deformations observed in the soybean-modified mixes were found to be 3% to 7% more than in the unmodified mixes. A slight variability (up to 7%) was also observed in the time-response spectra, i.e., peak load, unload and rest periods, in the soybean-modified mixes compared with the unmodified mixes. The Pearson correlation coefficient showed a significant trend between the resilient modulus test parameters for the soybean-modified warm asphalt mixes, i.e., load deformation, load time and deformation time. Soybean oil showed sustainable behavior as a bio-binder, particularly in the deformation-time response for the warm asphalt mixes. However, the effect of soybean in terms of the reduction of the load-carrying capacity from a sustainability perspective needs to be investigated.

Keywords: transportation infrastructures; sustainable pavements; durable pavements; warm-mix asphalts; bio-binders; lifecycle (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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