| Title: | Assessing the effects of sunlight and water on asphalt binder and pavement leachability related to the environment |
| Author(s): | Crawford AC; Kriech DM; Smith LA; Osborn LV; Kriech AJ; Heritage Research G; |
| Address: | "6320 Intech Way, Indianapolis, IN, 46278, USA. Electronic address: ACrawford@hrglab.com. 6320 Intech Way, Indianapolis, IN, 46278, USA" |
| DOI: | 10.1016/j.jenvman.2023.118638 |
| ISSN/ISBN: | 1095-8630 (Electronic) 0301-4797 (Linking) |
| Abstract: | "Extensive global research conducted over 30 years explores asphalt leachability and stormwater runoff. Asphalt's widespread usage in construction materials underscores the importance of understanding its environmental consequences. This study aims to assess the influence of sunlight exposure on water quality, particularly regarding the release of hazardous organic compounds such as polycyclic aromatic compounds. We investigated the effect of concurrent versus sequential exposure to water and sunlight, and dark versus light trials utilizing thin films of asphalt binder as well as old and freshly prepared pavement cores for analysis. Initial laboratory experiments reveal significant water-soluble species when thin asphalt films are exposed to solar simulation while underwater. However, simulating environmental conditions found in roadways by exposing the asphalt binder to solar simulation followed by water immersion leads to a substantial decrease in compound formation. Leachate water from 17-year-old asphalt and 15-year-old concrete pavements exhibits complex compound compositions associated with atmospheric and/or vehicular deposition, posing challenges in deconvoluting their origins. Light and dark trials conducted on freshly prepared asphalt pavement under environmental conditions of sunlight and rain demonstrate minimal runoff variation, with semi-volatile organic compound levels resembling the background. Future investigations will focus on applying insights gained from this study to analyze larger sample sets, with an emphasis on inherent hazardous compound variations" |
| Keywords: | *Sunlight *Water Movements Water Quality Hydrocarbons/analysis Asphalt Leachate Polycyclic aromatic compounds Runoff Sunlight; |
| Notes: | "MedlineCrawford, Alexis C Kriech, Douglas M Smith, Lisa A Osborn, Linda V Kriech, Anthony J eng England 2023/07/29 J Environ Manage. 2023 Nov 1; 345:118638. doi: 10.1016/j.jenvman.2023.118638. Epub 2023 Jul 26" |
