ABSTRACT

Aggregate-binder adhesiveness is a property that can affect the service life of asphalt pavements. In order to reduce the effects of the loss of adhesion between aggregates and binders over time, lime or amine-based anti-stripping agents are commonly used. The objective of this paper is to evaluate the impact of using an amine-based anti-stripping agent on the fatigue life of asphaltic pavements. Stiffness characterisation, the Simplified Viscoelastic Continuum Damage model, and the software FlexPAVE™ were used. Two different layered structures were analysed: one with a 0.10 m asphalt layer thickness, and another with a combination of two 0.05 m asphalt layers, with the same 0.10 m total asphalt layers thickness. The 10 years fatigue simulation was considered with 1,000,100 total ESALs traffic volume, single wheel loading of 40 kN, traffic speed of 60 km/h, and constant temperature of 20°C. It was concluded that mixtures with anti-stripping agent and/or granitic aggregate showed better fatigue behaviour than mixtures with neat binder and/or phonolitic aggregate. All investigated pavements showed bottom-up predicted crack initiation. It is more recommended to use the mixtures with amine-based anti-stripping agent on the bottom asphalt layer and mixtures with neat binder on the top layer.

摘要

骨料-粘结剂的粘附性是影响沥青路面使用寿命的一种特性。为了减少骨料和粘合剂之间随着时间的推移失去粘合力的影响，通常使用石灰或胺基抗剥离剂。本文的目的是评估使用胺基抗剥离剂对沥青路面疲劳寿命的影响。使用了刚度表征、简化的粘弹性连续损伤模型和软件 FlexPAVE™。分析了两种不同的分层结构：一种具有 0.10 m 的沥青层厚度，另一种具有两个 0.05 m 的沥青层的组合，具有相同的 0.10 m 总沥青层厚度。考虑了 10 年疲劳模拟，总 ESAL 交通量为 1,000,100，单轮载荷为 40 kN，车速60公里/小时，恒温20℃。得出的结论是，与抗剥离剂和/或花岗岩骨料的混合物相比，与纯粘合剂和/或音石骨料的混合物相比，具有更好的疲劳性能。所有被调查的路面都显示出自下而上的预测裂纹萌生。更推荐在底层沥青层使用含胺类抗剥落剂的混合物，在顶层使用纯粘合剂的混合物。