Optimization of warm mix asphalts using different blends of binders and synthetic paraffin wax contents

In road construction, several processes and products are now available to produce environmentally friendlier warm mix asphalts, including the use of synthetic paraffin wax additives. These additives facilitate the production of energy efficient asphalt mixtures at reduced manufacturing and construct...

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Bibliographic Details
Published in:Construction & building materials 2010-09, Vol.24 (9), p.1621-1631
Main Authors: Silva, Hugo M.R.D., Oliveira, Joel R.M., Peralta, Joana, Zoorob, Salah E.
Format: Article
Language:English
Subjects:
Analysis
Asphalt
Asphalts
Binder properties
Binders (Materials)
Bitumen modification
Blends
Construction materials
Fatigue resistance
Mixture performance
Optimization
Paraffin wax
Polymer blends
Production management
Production temperature
Properties
Roads
Rut resistance
Stiffness modulus
Sustainability
Synthetic paraffin wax additive
Warm mix asphalt
Water sensitivity
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Summary:In road construction, several processes and products are now available to produce environmentally friendlier warm mix asphalts, including the use of synthetic paraffin wax additives. These additives facilitate the production of energy efficient asphalt mixtures at reduced manufacturing and construction temperatures. However, their sustainability during the road life cycle can only be obtained by optimizing the mixture’s performance. Thus, the objective of this work was to assess the properties of different blends of base bitumens (softer to harder ones) containing a range of synthetic wax contents, as well as the performance of the corresponding warm mix asphalts, that could ultimately lead to more sustainable mixtures. It was concluded that different blends should be selected to maximize the temperature reduction, the fatigue or the rut resistance, without compromising the other properties of the mixture.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2010.02.030