Nanoclay Modified Asphalt

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© 2016 Elsevier Ltd. All rights reserved. Due to the special characteristics of nanomaterials, the nanoclay was selected in this chapter to modify the base asphalt binder materials. The nonmodified nanoclay (NMN) and polymer-modified nanoclay (PMN) were used in this chapter, and the original properties were tested through the field emission scanning electron microscope (FE-SEM) and Fourier transform infrared spectroscopy (FTIR). The modified asphalt binders were prepared and mixed in the high shear machine, and the Superpave™ tests were conducted to evaluate the binder performance, such as rotational viscosity (RV), dynamic shear rheometer (DSR), and bending beam rheometer (BBR). The SEM and FTIR were employed to observe the microstructures of control and modified asphalt binders and to understand the chemical bond ratio changes in the modified asphalt binders. Based on the test results, it is concluded that the addition of nanoclay into the asphalt binder can improve the resistance to rutting and fatigue cracking as well as the anti-oxidation performance.

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Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering