283141 Effects of Asphalt Compositions On Nanoscale Properties by Molecular Simulation

Thursday, November 1, 2012: 2:30 PM
411 (Convention Center )
Mohammad Masoori and Michael L. Greenfield, Chemical Engineering, University of Rhode Island, Kingston, RI

Having a deep understanding of all components in a mixture is the main key to understand and improve an industrial material. Asphalt is widely used material since ancient eras. Despite the fact that we used this material for over thousands years, we do not have a good understanding of its components and molecular structure of its components. Asphalt nano-scale properties have enormous effects on its properties. Another challenge of asphalt is the composition of its components, different compositions of same components may have different properties. Deep understanding of asphalt leads to pavement performance and durability. Because different asphalts are from different sources which have different components, they have different properties. Chemical composition and its effect on its properties has been investigated.  To analyze storage and loss modulus, the inverse Fourier transform has been applied to stress correlation function results from molecular simulations of different model asphalts, including those of Canadian model asphalt system (AAA-1 in the Strategic Highway Research Program).  Calculations for multiple temperatures investigate the effect on frequency-dependent storage and loss modulus.

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