Equipment Systems for the Commercial Production of Modified Asphaltby John Hipchen, Reichel & Drews, Inc, Itasca, United States,
Abstract: A considerable amount of research has been centered on various asphalt modifiers and their effect on rheological properties. As the paving industry is now focusing on high performance materials brought about by SHRP recommendations, it appears that asphalt modifiers will play an important role in future pavements. The commercialization of various modified asphalt products brings to light processing issues that will increasingly affect the road paving industry. This report reviews present state-of-the-art technology concerning the commercial production of modified asphalt. Expected technological advancements and their application in future production systems are also discussed. Material handling, metering technology, high and low shear mixing and automated process control are issues critical to modified asphalt production. These issues, as they relate to specific modifier types, are covered in this report as well as general processing concerns. It is concluded that accurate, reliable and highly automated production systems will become vital to the economic survival of modified asphalt producers.
Subject Headings: Materials processing | Industries | Asphalt pavements | Highways and roads | Automation | Equipment and machinery | Chemical processes
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