Abstract
In order to inhibit and remove the thin ice and extend the lifetime of the damaged bridge, the self-healing mechanism and hydrophobic performance of asphalt modified by siloxane and polyurethane (ASP) were studied by dynamic shear rheology (DSR), fluorescence microscope (FM), atomic force microscope (AFM), the fracture-healing-re-fracture test and molecular simulations. The experimental results indicated that the self-healing capability of ASP increased with increasing heating time and temperature. Furthermore, the addition of siloxane could improve the reaction energy barrier and complex modulus, and it is believed that the self-healing is a viscosity driven process, consisting of two parts namely crack closure and properties recovery. Contact angle of ASP increased with the increasing siloxane content and it deduced that the siloxane could improve the hydrophobic performance of ASP and the ASP molecule model could simulate well the self-healing mechanism and hydrophobic performance of ASP.
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Funded by the National Natural Science Foundation of China (No. 51808329) and Science and Technology Department of Shanxi Province International Cooperation (No. 201603D421027) and the Special Project of Commercialization of Shanxi Province Research Foundation (No.201804D131034)
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Zhou, X., Sun, B., Wu, S. et al. Evaluation on Self-healing Mechanism and Hydrophobic Performance of Asphalt Modified by Siloxane and Polyurethane. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 34, 630–637 (2019). https://doi.org/10.1007/s11595-019-2097-8
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DOI: https://doi.org/10.1007/s11595-019-2097-8