Effects of soaking on compressive strength of recycled polymer modified asphalt

• Published in: The international journal of pavement engineering Vol. 23; no. 5; pp. 1634 - 1644
• Main Authors: Shahin, M., Ahmed, T. U., Bari, M. N., Sobhan, M. A.
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 16-04-2022; Taylor & Francis LLC
• Subjects: Asphalt mixes; Bitumens; Bituminous cements; Compressive strength; Marshall properties; optimum modifier content; Polyethylene; Polyethylenes; Polyvinyl chloride; Soaking; Waste polyethylene; waste polyvinyl chloride
• ISSN: 1029-8436; 1477-268X
• DOI: 10.1080/10298436.2020.1817450

Polyethylene and polyvinyl chloride have been being used as a modifier of bitumen (asphalt cement), whereas application of waste polyethylene (WPE) and waste polyvinyl chloride (WPVC) are quite introductory in the field of bituminous pavement. This research studied the effects of soaking periods on the compressive strength of compacted modified bituminous mixes with WPE and WPVC. 11% WPE and 8% WPVC, the optimum modifier contents, were utilised in modifying the bitumen, which was found from an investigation of Marshall properties. Index of retained strength (IRS) of Mix-I, Mix-II, and Mix-III satisfied the standard limit of 75%, until 62.4, 84, and 67.2 h of soaking periods, respectively. WPE and WPVC showed excellent performance in submergence, encouraging the use of modified bitumen in the flood-prone region. WPE is suitable in cold climate as well as the warmer region, while WPVC is recommended only for the warmer climate. Utilisation of WPE and WPVC resulted in saving asphalt cement of 0.11 and 0.08 kg/kg, respectively, and reduce environmental pollution.