Characterization of the non-linear response of asphalt mixtures using a torsional rheometer |
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Authors: | Parag Ravindran J. Murali Krishnan K.R. Rajagopal |
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Affiliation: | aDepartment of Mechanical Engineering, Texas A&M University, College Station, TX-77843, United States;bTransportation Engineering Division, Department of Civil Engineering, IIT Madras, Chennai 600 036, India |
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Abstract: | There is sparse documentation of the large normal stresses that develop in asphalt mixtures subjected to shear, a typical characteristic of non-linear materials. In this study, we continue our initial investigations of using a torsional rheometer for measuring the normal stresses developed in asphalt mixtures when subjected to torsion. Samples of sand-asphalt mixture are subjected to rotation rates as low as one revolution in ninety minutes. This study provides further clear evidence of significant development of normal stresses due to shearing and emphasizes the need for the development of models that can describe such a phenomenon. |
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Keywords: | Non-linear response Torsional rheometer Asphalt mixtures Normal stresses |
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