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Mitigation of Moisture & Deicer Effects on Asphalt Thermal Cracking through Polymer Modification.
| 题名： | Mitigation of Moisture & Deicer Effects on Asphalt Thermal Cracking through Polymer Modification. |
| 作者： | Pan-T. |
| 关键词： | *Ice-prevention; *Deicers-; *Pavements-; *Asphalts-; *Thermal-cracking.;Airports-; Deicing-materials; Aggregates-; Fourier-transform-infrared-spectroscopy; Modifiers-; Polymers-; Acetate-; Rehabilitation-; Road-maintenance; Mitigation-; Moisture-. |
| 摘要： | Concurrent to the applications of acetate-based deicing and anti-icing agents (deicers), some Nordic airports have seen accelerated degradation of asphalt concrete (AC) in the last two decades. The coincidence of the acetate applications and the premature AC deterioration, however, hasn't received much attention in North America. A research study was recently conducted by the PI to investigate the potential AC deterioration by the acetate-based deicers and to explain its possible mechanism, of which the findings are presented in this study. Using a modified version of the ASTM Standard D3625-96, the field observation of acetate-induced AC deterioration was confirmed in the laboratory; and more severe mixture deterioration was consistently observed at higher acetate concentrations. Emulsification of asphalt was then studied in a series of aqueous solution tests that involved subjecting the asphalt binder to acetate solutions with different concentrations at different temperatures. The acetate-induced asphalt emulsification was further investigated using Fourier Transform Infrared (FTIR) spectroscopy, and a possible physiochemical mechanism was proposed based on which the process of acetate-induced AC deterioration was explained. This work tries to shed light on a somewhat neglected distress process occurring in AC pavements of U.S. Airports, and can be expected to guide the best practices of deicer application, asphalt mix design, and the rehabilitation and maintenance of airfield AC pavements. |
| 报告类型： | 科技报告 |
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