Development of Warm Mix Asphalt with the Aid of Microstructural Characterization
الملخص
The polymer-modified asphalt (PMA) reveals different types of advantageous properties
depending on the type of polymer. However, one of the unwanted changes in PMA is the
required higher temperature for mixing and compaction. To reduce these temperatures,
different percentages of warm mix additive (WMA) have been utilized. However, the
addition of WMA can lead to different micro-nano structural changes in the PMA
and can subsequently affect overall performance of the asphalt pavement. Therefore,
understanding the microstructural behavior of the polymer and additive modified asphalt
is crucial to achieve the desired performance. This study attempts to substantiate the
effect of WMA in three different PMAs and subsequent changes in different properties.
These changes can be scrutinized from different perspectives; however, correlating a
basic microstructural property to the rheology of asphalt is an effective way to understand
the mechanism and predict performance. In this regard, the need for microstructural
evaluation in terms of nano-adhesive properties is recommended. It is expected that
assessing the adhesive properties by simulating the field condition can address the
phase integrity and crystal structure of PMA and subsequent desired performance of
the asphalt pavement. Finally, the observed adhesive properties can be further evaluated
to find the prospects of other mechanical properties. Therefore, the need for a standard
microstructural evaluation method of the adhesive properties has also been addressed in
this study.
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- الهندسة المدنية والمعمارية [774 items ]
- Theme 2: Materials and Transportation Engineering [43 items ]