Polyurethane Binder and Mixture for Pavement: A Review
Publication: International Conference on Road and Airfield Pavement Technology 2023
ABSTRACT
As a new type of pavement paving material, the research of polyurethane mixture is becoming a hot spot in the industry. To further promote the application of polyurethane mixture in pavement engineering, an overview of polyurethane binders was first provided in this research, then the key factors affecting the road performance of polyurethane mixture are determined based on the existing research data. The research results suggest that the performance of polyurethane binders can be widely adjusted by controlling the types of soft and hard segments, microphase separation structure, and curing process. But their influences on the adhesion between polyurethane binders and aggregates, retention time, and other key workability are not yet clear. The mechanical properties and temperature stability of polyurethane mixture are significantly better than that of asphalt mixtures, but easily affected by aggregate gradation, curing method, and binder–aggregate ratio. The hydrolysis resistance and freeze–thaw resistance performances of polyurethane mixture still need to be further strengthened.
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Published online: Feb 6, 2024
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