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首页> 美国卫生研究院文献>Materials >Self-Healing Analysis of Half-Warm Asphalt Mixes Containing Electric Arc Furnace (EAF) Slag and Reclaimed Asphalt Pavement (RAP) Using a Novel Thermomechanical Healing Treatment
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Self-Healing Analysis of Half-Warm Asphalt Mixes Containing Electric Arc Furnace (EAF) Slag and Reclaimed Asphalt Pavement (RAP) Using a Novel Thermomechanical Healing Treatment

机译：采用新型热机械修复技术的电弧炉（EAF）炉渣和再生沥青路面（RAP）的半暖沥青混合料的自修复分析

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Nowadays, the self-healing of asphalt pavements promoted by microwave radiation heating energy is gaining attention and strength in the scientific community. However, most of these studies are only conceptual and, thus, remain shrouded in uncertainty regarding technology development, economy, and application effect. Therefore, there are several efforts underway to offer more effective assisted healing treatments that are capable of overcoming such uncertainties. This paper aims to assess and quantify the healing performance rates (HR) of half-warm recycled asphalt (HWRA) mixtures containing electric arc furnace (EAF) slag and total recycled asphalt pavement (RAP) rates. To this end, a novel assisted thermomechanical healing treatment (i.e., a recompaction-based technique and microwave heating energy) was put forward to promote the potential healing effect of this treatment on the mechanical properties of the asphalt mixtures. In order to do this, three microwave heating temperatures (25 °C, 60 °C, and 80 °C) and three mechanical recompaction levels (0, 25, and 50 gyrations) were selected. After that, the healing performance rates (%, HR) of the asphalt mixtures were calculated by repeated indirect tensile strength (ITS) and indirect tensile stiffness modulus (ITSM). The results indicated that the 8% EAF slag mixture was found to provide significant microwave heating energy savings by up to 69% compared with the benchmark 100% RAP mixture, and, at the same time, it experienced a remarkable stiffness recovery response of 140% of the initial mechanical properties. These findings encourage greater confidence in promoting this innovative thermomechanical-based healing treatment for in-situ surface course asphalt mixtures of road pavements.
机译：如今，微波辐射热能促进沥青路面的自愈在科学界日益受到关注和重视。但是，这些研究大多数只是概念性的，因此仍然笼罩在有关技术开发，经济和应用效果的不确定性中。因此，正在进行一些努力以提供能够克服这种不确定性的更有效的辅助愈合治疗。本文旨在评估和量化包含电弧炉（EAF）炉渣的半热再生沥青（HWRA）混合物的愈合性能率（HR）和总再生沥青路面（RAP）率。为此，提出了一种新颖的辅助的热机械修复处理（即基于再压实的技术和微波加热能），以促进该处理对沥青混合物的机械性能的潜在修复效果。为此，选择了三个微波加热温度（25°C，60°C和80°C）和三个机械压缩水平（0、25和50回转）。之后，通过重复的间接抗张强度（ITS）和间接抗张刚度模量（ITSM）计算沥青混合料的愈合率（％，HR）。结果表明，与基准的100％RAP混合物相比，8％的EAF炉渣混合物可显着节省多达69％的微波加热能量，同时，其刚度恢复响应高达140％的初始机械性能。这些发现鼓励人们更有信心促进这种创新的基于热机械的愈合方法，用于道路路面的原地表层沥青混合料。

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