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Roofing Asphalt Characterization Techniques for Improved QC

9 November 2018 No Comment

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Commentary, courtesy of Everett Crews (Ingevity), and AMAP

Although the history of the scientific study of the flow of matter is replete with names of our greatest thinkers, from Aristotle, Galileo, and Newton to Maxwell, Edison, and Einstein, the term “rheology,” like the science itself, was arguably born in the early twentieth century. The English-speaking world attributes the creation of the term, “rheology,” to E.C. Bingham and J. R. Crawford in 1929, although the word had been in use in German scientific literature as early as 1901 (the French limnologist, Francois Alphonse Forel, used the term casually in a journal article, suggesting its meaning was commonly understood then).

The theoretical foundations laid by these brilliant minds of the past notwithstanding, it is the development of highly advanced and affordable rheometric analytical instrumentation that has given engineers and scientists the penetrating insights and understanding we enjoy today of the indisputable links between the molecular-level physical chemistry of bituminous materials and their multifarious viscoelastic behavior under static and dynamic stresses and deformations. Longer-lived, more durable, and increasingly cost-effective pavements and roofing materials are the direct products of these advanced rheometric capabilities.

John Casola, life-time member of the Association of Modified Asphalt Producers (AMAP) and rheologist for Malvern Panalytical, Inc., gave a presentation on advancements in the rheological characterization of modified bitumen both to the AMAP conference audience as well as to the workshop attendees – see link above. His seminars were so well received that Michael Anderson, Director of Research and Laboratory Services at the Asphalt Institute, invited John to present at this past Spring’s Asphalt Institute meeting in Savannah, and Reed Hitchcock, Executive Vice President of the Asphalt Roofing Manufacturers Association, has requested John for a presentation at their meeting in Tampa.