A Comparative Review of Hot and Warm Mix Asphalt Technologies from Environmental and Economic Perspectives: Towards a Sustainable Asphalt Pavement

Milad, A. and Babalghaith, A.M. and Al-Sabaeei, A.M. and Dulaimi, A. and Ali, A. and Reddy, S.S. and Bilema, M. and Yusoff, N.I.M. (2022) A Comparative Review of Hot and Warm Mix Asphalt Technologies from Environmental and Economic Perspectives: Towards a Sustainable Asphalt Pavement. International Journal of Environmental Research and Public Health, 19 (22). ISSN 16617827

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Abstract

The environmental concerns of global warming and energy consumption are among the most severe issues and challenges facing human beings worldwide. Due to the relatively higher predicted temperatures (150�180 °C), the latest research on pavement energy consumption and carbon dioxide (CO2) emission assessment mentioned contributing to higher environmental burdens such as air pollution and global warming. However, warm-mix asphalt (WMA) was introduced by pavement researchers and the road construction industry instead of hot-mix asphalt (HMA) to reduce these environmental problems. This study aims to provide a comparative overview of WMA and HMA from environmental and economic perspectives in order to highlight the challenges, motivations, and research gaps in using WMA technology compared to HMA. It was discovered that the lower production temperature of WMA could significantly reduce the emissions of gases and fumes and thus reduce global warming. The lower production temperature also provides a healthy work environment and reduces exposure to fumes. Replacing HMA with WMA can reduce production costs because of the 20�75 lower energy consumption in WMA production. It was also released that the reduction in energy consumption is dependent on the fuel type, energy source, material heat capacity, moisture content, and production temperature. Other benefits of using WMA are enhanced asphalt mixture workability and compaction because the additives in WMA reduce asphalt binder viscosity. It also allows for the incorporation of more waste materials, such as reclaimed asphalt pavement (RAP). However, future studies are recommended on the possibility of using renewable, environmentally friendly, and cost-effective materials such as biomaterials as an alternative to conventional WMA-additives for more sustainable and green asphalt pavements. © 2022 by the authors.

Item Type: Article
Additional Information: cited By 8
Uncontrolled Keywords: asphalt; carbon monoxide; hot mix asphalt; nitrous oxide; sulfur dioxide; unclassified drug; warm mix asphalt; asphalt; hydrocarbon, asphalt; carbon emission; comparative study; energy use; global warming; life cycle analysis; pavement; sustainability, agricultural worker; air pollution; aquatic environment; arterial embolization; biocompatibility; climate change; comparative study; computer simulation; energy consumption; energy resource; environmental exposure; environmental health; fume; gas; greenhouse effect; greenhouse gas; greenhouse gas emission; heat; life cycle assessment; marine environment; municipal solid waste; occupational exposure; physical chemistry; Review; temperature; viscosity; warming; building material; human; technology, Construction Materials; Gases; Humans; Hydrocarbons; Technology
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 19 Dec 2023 03:22
Last Modified: 19 Dec 2023 03:22
URI: https://khub.utp.edu.my/scholars/id/eprint/16219

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