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Optimization of polyurethane-bonded thin overlay mixture designation for airport pavement

Frontiers of Structural and Civil Engineering 2022年第8期16卷 947-961页

作者： Xianrui LI Ling XU Qidi ZONG Fu JIANG Xinyao YU Jun WANG Feipeng XIAO Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai 201804China CAAC East China Regional Administration Shanghai 200335China Ningbo Airport Group Co. Ltd.Ningbo 315154China

This research explored the application potential of PUM thin-overlay technology on airport rapid *** rapid curing process of polyurethane binder determines the limited time window for mixing and construction of polyurethane-bonded mixture(PUM),which presents significant difference with hot-mix asphalt(HMA)***,this research investigated and optimized the mix design of PUM for airport thin-overlay technology based on its thermosetting ***,limestone and basalt were comprehensively compared as an aggregate for ***,the effects of molding and curing conditions were studied in terms of mixing time,molding method,molding parameters and curing *** analysis was also conducted to evaluate the effects of gradation and particle size on PUM performances based on gray relational analysis(GRA),thus determining the key particle size to control PUM ***,the internal structural details of PUM were captured by X-ray CT scan *** results demonstrated that it only took 12 hours to reach 75%of maximum strength at a curing temperature of 50°C,indicating an efficient curing process and in turn allowing short traffic *** internal structural details of PUM presented distribution of tiny pores with few connective voids,guaranteeing waterproof property and high strength.

关键词： polyurethane-bonded mixture mix design optimization airport pavement thin overlay gray relational analysis

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