Hot Mix Asphalt Additives

The effects of moisture damage on our roadways is well documented and as we all know oil and water do not mix. Coating aggregate with moisture is a very simple process, however, achieving good coating with asphalt can be extremely difficult especially if that aggregate is siliceous in nature.

Consider the amount of water present in aggregate stockpiles weeks after a heavy rainfall event. Since asphalt is used as a binding agent and road system, it is of the utmost importance that the asphalt binder fully coat and maintain a consistent bond throughout the life cycle of the asphalt pavement. Early deterioration of this bond is called stripping and can lead to premature road failures, safety issues and high costs for taxpayers.

The proper use of anti-stripping agents improves the bond between asphalt and aggregate thus improving the long-term stability of the road. Without the use of asphalt additives these roads would have failed prematurely resulting in costly repairs and user cost delays. In the worst case scenario, Departments of Transportation could have required the removal and replacement of the pavement.

AD-here^®

Road Science is the leading manufacturer of liquid anti-strips in North America. Our AD-here^® line of products bridges the gap between the asphalt and the aggregate, fully wetting the aggregate surface and creating a stronger bond at the aggregate interface. We’ve optimized our heat-stable additive line to be soluble in asphalt while maintaining highly polar functionality that adheres strongly to the aggregate surface to remove moisture and keep it out of the pavement after it is constructed. Road Science additives have been proven to successfully increase the wet strength of pavements.

Our AD-here product line includes multiple formulations which are specifically designed to address pavement distresses that other competing anti-strips cannot. These products can be added directly to liquid asphalt at refineries or terminals or at hot mix plants. If odor is a concern, we also offer a line of products specifically formulated to reduce or eliminate odors from hot asphalt.