基于性能演变的水性环氧沥青开普封层施工方法优化

为进一步提升水性环氧沥青开普封层使用品质,针对水性环氧沥青开普封层施工现存问题,借助有机玻璃界面状态图像观测与层间剪切试验,研究了不同固化状态下碎石封层黏结性能,提出了水性环氧沥青碎石封层两阶段分步式压实方法;系统分析了微表处摊铺时机对碎石封层沥青-碎石黏附与层间黏结性能的影响程度,探究了微表处开放交通时间与交通荷载对...

Optimization of Construction Method of Waterborne Epoxy Asphalt Cape Seal Based on Performance Evolution

This study addresses existing problems in the construction of waterborne epoxy asphalt cape seal to further improve its use quality. The bond performances of chip seal under different curing conditions were studied using interface state observation of organic glass and interlaminar shear tests. A two-stage and step-by-step rolling method of waterborne epoxy asphalt chip seal was proposed. The influence of micro-surfacing paving timing on the asphalt-macadam adhesion performance and inter-layer bonding performance of chip seal was analyzed systematically. The effects of opening timing and initial traffic volume of the micro-surfacing on the structural strength and surface function of the cape seal were explored. The optimal paving timing and open traffic conditions for the micro-surfacing were determined. Finally, the construction method of waterborne epoxy asphalt cape seal was optimized. Further, the optimal construction parameters and time were recommended. The results indicate that the interface-state observation method for organic glass can quickly and accurately evaluate the bonding and waterproof state of the waterborne epoxy asphalt cape seal, and the results are consistent with those of the macro test. The two-stage and step-by-step rolling method can improve the inter-layer bonding performance of the waterborne epoxy asphalt cape seal effectively. The growth rate is over 14.29%. The specific process is as follows: after the chip seal is paved, it is rolled once in an initial slight-compaction process; after curing to a state between surface dry and dry, it is rolled once using the standard rolling process at a later stage. Based on the performance-evolution law of chip seal, the optimal paving time of micro-surfacing is as follows: chip seal is between the surface-dry state and dry state. Based on the performance-evolution law of cape seal and the influence of the traffic load, the optimal open traffic conditions are as follows: after the micro-surfacing is paved and maintained for 1-1.5 h at ambient temperature (25 ℃), the traffic is opened appropriately. Moreover, the traffic can be fully opened after approximately 2 h. This provides a scientific basis and theoretical support for the quality control of waterborne epoxy asphalt cape seal.