Moisture sensitivity and heavy metal leaching potentials of asphalt mixtures incorporating rubber modifiers and wax-based admixture

Sharvin Poovaneshvaran; Ali Jamshidi; Mohd Rosli Mohd Hasan; Mohd Fahmi Haikal Mohd Ghazali; Waqar Ahmed Gul; Ramadhansyah Putra Jaya

doi:10.1016/j.pce.2023.103404

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Moisture sensitivity and heavy metal leaching potentials of asphalt mixtures incorporating rubber modifiers and wax-based admixture

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Moisture sensitivity and heavy metal leaching potentials of asphalt mixtures incorporating rubber modifiers and wax-based admixture

Sharvin Poovaneshvaran, Ali Jamshidi, Mohd Rosli Mohd Hasan, Mohd Fahmi Haikal Mohd Ghazali, Waqar Ahmed Gul and Ramadhansyah Putra Jaya

Physics and Chemistry of the Earth, Vol.132, pp.1-13

2023

DOI: https://doi.org/10.1016/j.pce.2023.103404

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Abstract

Bonding

Environmental studies

Moisture damage

Renewable resources

Sustainable pavement

Waste recycling

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.

Details

Title: Moisture sensitivity and heavy metal leaching potentials of asphalt mixtures incorporating rubber modifiers and wax-based admixture
Authors: Sharvin Poovaneshvaran (Author) - Universiti Sains Malaysia
Ali Jamshidi (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
Mohd Rosli Mohd Hasan (Corresponding Author) - Universiti Sains Malaysia
Mohd Fahmi Haikal Mohd Ghazali (Author) - Universiti Sains Malaysia
Waqar Ahmed Gul (Author) - King Abdulaziz University
Ramadhansyah Putra Jaya (Author) - Universiti Malaysia Pahang
Publication details: Physics and Chemistry of the Earth, Vol.132, pp.1-13
Publisher: Elsevier Ltd
DOI: 10.1016/j.pce.2023.103404
ISSN: 1873-5193
Grant note: FRGS/1/2021/TK01/USM/02/1 / Ministry of Higher Education Malaysia
Organisation Unit: School of Science, Technology and Engineering; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99728798202621
Output Type: Journal article

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