Exploring a premium asphalt patching mixes by using 100% RAP recycler

路面不断恶化，需要进行日常维护，如裂缝和坑洞维修。目前在加拿大，有大量剩余的再生沥青路面（RAP）材料。在沥青修补混合料中更多地使用这种丰富的资源具有许多经济和环境效益。当生产具有高RAP含量的沥青混合料时，必须使用再生剂来恢复粘合剂性能，最重要的是其柔韧性。 红外加热是一种可用于有效加热沥青混合物的技术，其燃烧和损坏材料的风险较小，这在使用常规高强度气体燃烧器时很常见。本项目将评估使用100% RAP材料和红外加热技术制成的沥青修补混合料的性能。 计划进行广泛的实验室测试，以评估使用不同RAP源材料、再生剂和红外加热温度创建的多种沥青修补混合物。这些混合物的性能将与用相同材料制成的混合物进行比较，但用传统的高强度气体燃烧器加热。 建议的评价这些沥青修补混合料的室内性能试验包括：动态模量测试，弯曲试验（四点弯曲梁），间接拉伸试验，温度应力约束试样试验，和汉堡轮迹试验。该项目的预期成果包括：了解不同RAP材料的性能如何受到红外线加热与传统气体燃烧器的影响，量化不同再生剂对RAP材料的影响，以及使用100% RAP材料制成的沥青修补混合料的实验室性能结果。 此外，这项研究的重点是创造机会，经济的道路修补业务的地方，原生沥青材料是很难获得，并验证环境效益使用更多的RAP材料在道路维修和维护。

Pavements are constantly deteriorating and require routine maintenance such as crack and pothole repairs. Currently in Canada, there is a large surplus of Recycled Asphalt Pavement (RAP) materials. Using more of this abundant resource in asphalt patching mixtures has many economic and environmental benefits. When creating asphalt mixtures with high RAP content, one must use rejuvenators to restore binder properties, most importantly its flexibility. Infrared heating is a technology which can be used to effectively heat asphalt mixtures with less risk of burning and damaging the materials, a common occurrence when using conventional high intensity gas burners. This project will evaluate the performance of asphalt patching mixtures made with 100% RAP materials and infrared heating technology. Extensive laboratory testing is planned to evaluate multiple asphalt patching mixtures created with different RAP source materials, rejuvenators, and temperature of infrared heating applied to them. The performance of these mixtures will be compared to mixtures created with the same materials, but heated with a conventional high intensity gas burner. Proposed laboratory performance tests to evaluate theses asphalt patching mixtures include: dynamic modulus testing, flexural test (four-point bending beam), indirect tension test, thermal stress restrained specimen test, and the Hamburg wheel tracking test. Results expected from this project include: knowledge of how the properties of different RAP materials are affected by infrared heating versus traditional gas burners, quantification of the effects that different rejuvenators have on RAP materials, and the laboratory performance results of asphalt patching mixtures made with 100% RAP materials. Furthermore, this research is focused on creating opportunity for economical roadway patching operations in locations where virgin asphalt material is difficult to acquire, and verifying the environmental benefits of using more RAP materials in roadway repairs and maintenance.