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

路面不断恶化，需要进行常规维护，如裂缝和坑坑洼洼的维修。目前在加拿大，再生沥青路面(RAP)材料大量过剩。将这种丰富的资源更多地用于沥青修补混合料，具有许多经济和环境效益。在配制高RAP含量的沥青混合料时，必须使用再生剂来恢复粘结剂的性能，最重要的是其灵活性。红外加热是一种可以有效加热沥青混合料的技术，而烧焦和损坏材料的风险较小，这在使用传统的高强度气体燃烧器时是常见的。本项目将对100%RAP材料和红外加热技术制成的沥青修补混合料的性能进行评估。计划进行广泛的实验室测试，以评估使用不同的RAP源材料、再生剂和红外线加热温度创建的多种沥青修补混合料。这些混合物的性能将与使用相同材料创建的混合物进行比较，但使用传统的高强度气体燃烧器加热。建议进行的室内性能试验包括：动弹性试验、弯曲试验(四点弯曲梁)、间接拉伸试验、热应力约束试件试验和汉堡车辙试验。该项目的预期结果包括：了解不同RAP材料的性能如何通过红外加热与传统气体燃烧器进行比较，量化不同的再生剂对RAP材料的影响，以及100%RAP材料制成的沥青修补混合料的实验室性能结果。此外，这项研究的重点是在难以获得原始沥青材料的地方创造经济的道路修补作业的机会，并验证在道路维修和维护中使用更多RAP材料的环境效益。

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.