Emulsifiers for Asphalt & Refined Coal Tar
Asphalt and refined coal tar (RT) emulsions are delicate colloidal systems that are dependent on the emulsifier chemistry used for both stability and end-use performance. All applications require the emulsion to remain stable when stored, transported, pumped and mixed, but once applied to the road, it must quickly “break” or separate back into its original disparate oil and water phases. It is when this separation occurs that the road begins the process of developing adhesive and cohesive strength, eventually becoming capable of supporting and withstanding the stresses of traffic loading.
The paradoxical features emulsions must possess can present challenges for emulsion producers and the industry as a whole. Unstable emulsions cost the producer money spent on emulsion reprocessing, tank clean-up, and customer refunds and credits. Emulsions that do not build strength quickly enough after being applied cost the contractor money as a result of reduced production rates, extra traffic control and unnecessary repair work.
Road Science understands the emulsion paradox very well. We know the emulsifier and end product features required for the successful production and application of all emulsion types. Emulsion producers using the ArrMuls® line of anionic emulsifiers can rest assured that their tack coat emulsions have the best particle size and stability characteristics, saving them money and headaches. They also have gratified paving contractor customers not only because of emulsion durability and ease of use, but also because once applied, they can return traffic sooner and pave more miles, saving them money.
Specialty emulsion producers using the ArrTekk® line of cationic emulsifiers to make high performance micro-surfacing and recycling emulsions benefit by providing their customers with cutting edge technology that lengthens roadway life.