Introduction

For several decades the asphalt industry has talked about energy savings and environmental benefits in cold or warm asphalt processes. In spite of all the predictions, it has not happened. Cold mixes occupy various niche market areas but have not had any significant impact on hot mix asphalt as the primary road surfacing material.

The main purpose of this review is to draw attention to some innovative processes that could provide increased opportunity for lower temperatures in asphalt mixes.

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