Rheological properties and storage stability of asphalt modified with nanoscale polyurethane emulsion |
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| Authors: | Ruien Yu Xijing Zhu Xing Zhou Yanfei Kou Maorong Zhang Changqing Fang |
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| Affiliation: | 1. School of Mechanical Engineering, North University of China, Taiyuan, Shanxi, P. R. China;2. School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, Shaanxi, P. R. China |
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| Abstract: | Nanoscale polyurethane emulsion which synthesized in previous work was used as polymer modifying agent herein to prepare modified asphalt by gentle agitation method. Rheological properties, storage stability, microstructure and polymer dispersibility of WPU-modified asphalt were investigated using dynamic shear rheological (DSR), segregation test, and fluorescence microscopy. Due to the reaction of active NCO groups in WPU and active hydrogen atoms in asphalt, the modified asphalt system can be stable stored at high temperature. In addition, the nano-particle size of polyurethane emulsion makes polymer uniformly dispersed in modified asphalt and work better. |
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| Keywords: | microstructure modified asphalt polyurethane emulsion rheological properties storage stability |
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