Research on High-strength Cold Paved Asphalt Pavement Materials and Structural Design
High-strength cold paved mixtures are environmentally friendly and not limited by temperature,while also avoiding the defects such as insufficient compaction caused by temperature loss that cannot be avoided by hot mixed mixtures.However,in order to achieve the effect of hot mixed asphalt pavement,the structural design of the pavement needs to be analyzed and studied specifically based on the mechanical properties of high strength cold mixed asphalt mixtures.Firstly,the structural design of high-strength cold mixed asphalt mixture is carried out.Compared with the conventional modified AC-13,two pavement structural design schemes are selected and analyzed for pavement mechanics.The research results show that the suitable gradation for high-strength cold paved asphalt mixture is DE-10,in which the optimal asphalt content without water is 5.7％,and the emulsified asphalt content is 9.5％.The high-strength cold mixed asphalt mixture not only exhibits a certain degree of flexibility,but also exhibits the high stiffness and strength.When the high-strength cold paved asphalt is selected as the upper layer,all indicators have been optimized compared to the conventional pavement under the standard load.The overall thickness of the pavement has been reduced compared to the conventional schemes,while the performance has been increased.The high-strength cold paved asphalt structures have good resistance to higher loads.
high-strength cold paved asphaltasphalt mixturedesign of pavement structure
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