Mechanical characterization of asphalt tear-off roofing shingles in Hot Mix Asphalt
Mechanical characterization of asphalt tear-off roofing shingles in Hot Mix Asphalt
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DOI：
10.1016/j.conbuildmat.2013.08.037
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发表时间：
2014-01-15
影响因子：
7.4
通讯作者：
Behzadan, Amir H.
中科院分区：
文献类型：
--
作者：
Nam, BooHyun;Maherinia, Hamid;Behzadan, Amir H.
在美国，沥青撕裂屋面板是城市固体废物(MSW)流中产量最大的产品之一。应用于道路建筑材料可以是回收这些撕裂瓦片的另一种选择。本文从以下几个方面论述了撕裂瓦在热拌沥青中的有益应用：(1)撕裂瓦和抽出胶凝材料的物理性能；(2)瓦片混合沥青混合料的力学性能和性能；(3)HMAS中使用的瓦片的最佳配合比设计。使用从佛罗里达州和明尼苏达州(但主要研究佛罗里达州的瓦片)获得的撕裂瓦片进行样品制备，对于三种不同的原始粘结剂含量，涉及不同的瓦片添加量(范围为0%到6%，增量为1%)。实验室测试方法包括对提取的粘结剂进行回流提取、回收和渗透测试，以及对混合料进行改进的马歇尔稳定性、水分敏感性和沥青路面分析仪(APA)测试。瓦片的加入使混合料中的粘结剂变得更加坚硬，从而增加了材料的刚性、稳定性和抗车辙能力。还对样品的断口进行了目视检查，以调查裂缝表面通过集料或在沥青结合料中的位置，这是混合料中沥青膜充足水平的良好指标。根据试验结果确定了HMAS中撕裂瓦与沥青结合料的最佳配合比。(C)2013爱思唯尔有限公司。保留所有权利。
In the USA, asphalt tear-off roofing shingle is one of the largest productions in the municipal solid waste (MSW) stream. Applications into road construction materials can be an alternative to recycle these tear-off shingles. This paper discusses the beneficial use of tear-off shingles in Hot-Mix Asphalt (HMA) by presenting: (1) the physical properties of tear-off shingles and the extracted binder, (2) the mechanical behaviors and properties of shingle-mixed HMA, (3) an optimum mix design for the shingle used in HMAs. The tear-off shingles obtained from the states of Florida and Minnesota (but main study on the Florida's shingles) were used for the sample preparation that involves varied amount of shingle addition (ranged from 0% to 6% with 1% increment) for three different virgin binder contents. Laboratory testing methods include a reflux extraction and recovery and penetration tests for the extracted binder and a modified Marshall stability, moisture susceptibility, and asphalt pavement analyzer (APA) tests for the mixtures. The shingle addition causes stiffer binder in the mixture; resulting in the increase of material stiffness, stability, and rutting resistance. A visual inspection of the fractured surface of samples was also conducted to investigate the location of the crack surface either through the aggregates or in the asphalt binder, which is a good indicator of sufficient level of asphalt film in the mixture. Testing results were used to identify the optimum mixing proportion of the tear-off shingle and asphalt binder in HMAs. (C) 2013 Elsevier Ltd. All rights reserved.