What is it about?
The basic ability of the bitumen is to hold together the mineral aggregates in the asphalt concrete. This ability is known as a "cohesion". The cohesion value can give an information to predict the strength of the asphalt concrete. For a specific binders with polymers or warm mix additives the cohesion index can be more useful than a conventional indexes of the bitumen quality. In this research the simple test methodology is shown, the basic principles and test parameters are described, that can be useful for researchers.
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Why is it important?
The conventional bitumen indexes, such as penetration or a softening point temperature, are good to predict the asphalt concrete quality. With a modified bitumen these indexes turn to unreliable. This problem requires an expensive test equipment to find more complex and fundamental binder characteristics. The cohesion test can be provided with a simple test equipment, and the test results are reliable enough to predict the parameters of the asphalt concrete.
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This page is a summary of: Cohesion of bitumen: its opportunities and prospects, Road Materials and Pavement Design, December 2018, Taylor & Francis,
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