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首页> 外文期刊>Journal of Solid Waste Technology and Management >CHARACTERISTICS OF CHAT-ASPHALT FOR ROAD BASE APPLICATION
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CHARACTERISTICS OF CHAT-ASPHALT FOR ROAD BASE APPLICATION

机译：道路基应用聊天聊天的特征

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摘要

More than 35 million cubic meters of mine chat, a waste material from abandoned lead and zinc mining operations, are presently stockpiled at the Tar Creek Superfund Site. Currently, the Oklahoma Department of Transportation (ODOT) uses a rather small percentage (about 20%) of washed (not raw) chat in hot mix asphalt (HMA). No systematic bench-scale tests, incorporating different percentages of chat, have been performed previously for characterization of raw chat in HMA in an environmentally responsible manner. In order to maximize the use of raw chat in chat-asphalt, three different base mixes having three different percentages of raw chat were prepared according to the Superpave mix design methodology. It is observed that raw chat is an excellent source of aggregate in HMA for road base. As much as 50% raw chat can be used in an S3-type Superpave base mix. Chat-asphalt mixes also did well in performance tests, namely moisture susceptibility, APA rut, and permeability. A suite of environmental tests was performed to examine the leaching potential of heavy metals (lead, zinc, and cadmium) in chat-asphalt due to dry and wet rut tests, and simulated milling. Test results indicate that chat-asphalt can be used safely as a roadway base.
机译：目前，Tar Creek超级基金站点储存了超过3500万立方米的矿井闲谈，这是废弃的铅和锌开采作业产生的废料。目前，俄克拉荷马州交通运输部（ODOT）在热拌沥青（HMA）中使用了相当少的百分比（约20％）的洗净（非原始）闲聊。以前尚未进行过以环境负责的方式对HMA中的原始聊天进行表征的系统化台式测试，其中包含不同百分比的聊天。为了最大程度地在聊天沥青中使用原始聊天，根据Superpave混合设计方法，准备了三种具有三种原始聊天百分比的基本混合。可以看出，原始聊天是HMA中路基聚集的极好来源。在S3型Superpave基本混合中可以使用多达50％的原始聊天。聊天沥青混合料在性能测试中也表现出色，即水分敏感性，APA车辙和渗透性。进行了一套环境测试，以检查由于干法和湿法车辙试验以及模拟研磨而在聊天沥青中重金属（铅，锌和镉）的浸出潜力。测试结果表明聊天沥青可以安全地用作道路基础。

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