Evaluation of the potential of Sasobit super([registered]) to reduce required heat energy and CO sub(2) emission in the asphalt industry

Warm-mix asphalt (WMA) has been gaining popularity in the asphalt industry primarily because of its ability to lower the energy required to blend asphalt mixes, which in turn results in less fuel consumption, slower aging of the asphalt binder and reduced emission of greenhouse gases. This paper eva...

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Bibliographic Details
Published in:Journal of cleaner production 2010-12, Vol.18 (18), p.1859-1865
Main Authors: Hamzah, Meor Othman, Jamshidi, Ali, Shahadan, Zulkurnain
Format: Article
Language:English
Subjects:
Aggregates
Air pollution
Asphalt
Binders
Carbon dioxide
Charts
Emissions control
Manufacturing engineering
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Summary:Warm-mix asphalt (WMA) has been gaining popularity in the asphalt industry primarily because of its ability to lower the energy required to blend asphalt mixes, which in turn results in less fuel consumption, slower aging of the asphalt binder and reduced emission of greenhouse gases. This paper evaluates the effects of different quantities of a WMA additive known as Sasobit super([registered]) on the required heat energy and the amount of CO sub(2) produced to increase the temperature of two aggregates from three sources and one binder from 25 C to the point of mixing. The results showed that incorporating 1% Sasobit super([registered]) can potentially reduce the required heat energy and amount of CO sub(2) produced by 2.8% and 3.0%, respectively, for all aggregate types and sources investigated. The paper also presented design charts that enable energy policy makers and engineers to select the appropriate Sasobit super([registered]) content to produce the most cost effective asphalt mixture with less environmental impact. The design charts show that 1.6% Sasobit super([registered]) content is the most suitable proportion to be blended into the asphalt binder without compromising pavement resistance against fatigue failure. Two similar aggregates from different sources may exhibit similar specific gravities, but their specific heat capacities can vary widely. These differences have a significant effect on the required heat energy, asphalt production cost and the amount of emissions released into the environment.
ISSN:0959-6526
DOI:10.1016/j.jclepro.2010.08.002