Poovaneshvaran, Sharvin and Jamshidi, Ali and Mohd Rosli, Mohd Hasan and Mohd Fahmi Haikal, Mohd Ghazali and Ahmed Gul, Waqar and Putra Jaya, Ramadhansyah (2023) Moisture sensitivity and heavy metal leaching potentials of asphalt mixtures incorporating rubber modifiers and wax-based admixture. Physics and Chemistry of the Earth, Parts A/B/C (103404). pp. 1-13. ISSN 1474-7065. (In Press / Online First) (In Press / Online First)
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Abstract
Moisture damage is one of the most frequent damages that occurs on asphalt pavements. The application of rubberized materials for asphalt is widely acceptable due to cost saving and environmentally friendly. The purpose of this study is to assess the performance of rubberized asphalt mixtures containing wax-based admixture, namely Tough Fix Hyper (TFH), in terms of moisture sensitivity and hazardous compound leaching potential. The moisture absorption, chemical immersion, and boiling water tests were used to assess the resistance to moisture damage on aggregate-binder bonding characteristics. Following that, the trend of moisture sensitivity was evaluated through an image analysis procedure. To simulate the environmental impact of leaching, the toxicity characterization leaching procedure (TCLP) test was adopted. The results showed that interaction between the crumb rubber or latex with TFH decreases the stripping value of the mixes significantly based on the chemical immersion test. Furthermore, the image analysis of the samples subjected to boiling water conditioning showed that pixels of asphalt samples without TFH, ranging from 524,949 to 472,346, decrease from 520,870 to 289,070, indicating that the asphalt remained coated area improved by 67.70–91.39%. The analysis of the leachate test revealed that the heavy metals, including arsenic (As), nickel (Ni), copper (Cu), chromium (Cr), vanadium (V), and cadmium (Cd), were not detected. However, zinc (Zn) was detected in the modified mixture, ranging from 0.05 to 0.114 mg/L, which lies within the allowable norm. In conclusion, the incorporation of crumb rubber and TFH in asphalt mixtures poses no environmental risk.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Bonding; Environmental studies; Moisture damage; Renewable resources; Sustainable pavement; Waste recycling |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TE Highway engineering. Roads and pavements |
| Faculty/Division: | Faculty of Civil Engineering Technology |
| Depositing User: | PM Dr. Ramdhansyah Putra Jaya |
| Date Deposited: | 11 Aug 2023 07:49 |
| Last Modified: | 11 Aug 2023 07:49 |
| URI: | http://umpir.ump.edu.my/id/eprint/38282 |
| Download Statistic: | View Download Statistics |
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