Reclaimed Asphalt Pavement in Asphalt Mixtures: State of the Practice
Reclaimed Asphalt Pavement in Asphalt Mixtures: State of the Practice
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发表时间：
2011-04
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通讯作者：
A. Copeland
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作者：
A. Copeland
前言回收沥青路面创造了一个循环的再利用材料，优化利用自然资源。再生沥青路面（RAP）是一个有用的替代原生材料，因为它减少了需要使用原生骨料，这是一个稀缺的商品在美国的一些地区。它还减少了生产沥青铺路混合料所需的昂贵的新沥青粘合剂的量。本报告向从业者介绍了美国RAP使用的实践状况，以及在保持高质量路面基础设施的同时增加RAP在沥青路面混合料中的使用的最佳实践。高比例的RAP混合物通过加工和生产实践实现，从而节省成本和能源。基于通过长期路面性能（LTPP）计划对含有30% RAP的路面进行的评估，已经确定含有高达30% RAP的路面的性能与由不含RAP的原始材料建造的路面的性能相似。这份报告是感兴趣的工程师，承包商，和其他参与规范和设计的沥青混合料的柔性路面，以及那些参与促进最佳使用RAP。美国政府不支持产品或制造商。商标或制造商名称出现在本报告中，因为它们被认为对本文件的目标至关重要。质量保证声明联邦公路管理局（FHWA）以促进公众理解的方式提供高质量的信息，为政府、行业和公众服务。标准和政策用于确保和最大限度地提高其信息的质量、客观性、实用性和完整性。FHWA定期审查质量问题，并调整其计划和流程，以确保持续的质量改进。摘要随着市场需求的增加和集料及结合料供应的有限，热拌沥青混合料（HMA）生产商发现再生沥青路面（RAP）是热拌沥青混合料中有价值的组成部分。因此，人们对增加沥青混合料中RAP的用量重新产生了兴趣。虽然有许多因素推动RAP在沥青路面中的使用，但两个主要因素是经济节约和环境效益。RAP是新材料的有用替代品，因为它减少了新骨料的使用和生产HMA所需的新沥青结合料的量。使用RAP大大减少了进入垃圾填埋场的建筑垃圾量，而且它不会...
FOREWORD Recycling asphalt pavement creates a cycle of reusing materials that optimizes the use of natural resources. Reclaimed asphalt pavement (RAP) is a useful alternative to virgin materials because it reduces the need to use virgin aggregate, which is a scarce commodity in some areas of the United States. It also reduces the amount of costly new asphalt binder required in the production of asphalt paving mixtures. This report informs practitioners about the state of the practice for RAP use in the United States as well as best practices for increasing the use of RAP in asphalt pavement mixtures while maintaining high-quality pavement infrastructures. High percentage RAP mixtures are achieved with processing and production practices, resulting in cost and energy savings. Based on an evaluation of pavements containing 30 percent RAP through the Long-Term Pavement Performance (LTPP) program, it has been determined that the performance of pavements containing up to 30 percent RAP is similar to that of pavements constructed from virgin materials with no RAP. This report is of interest to engineers, contractors, and others involved in the specification and design of asphalt mixtures for flexible pavements, as well as those involved in promoting the optimal use of RAP. The U.S. Government does not endorse products or manufacturers. Trademarks or manufacturers' names appear in this report because they are considered essential to the objective of the document. Quality Assurance Statement The Federal Highway Administration (FHWA) provides high-quality information to serve the Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement. Abstract With increased demand and limited aggregate and binder supply, hot mix asphalt (HMA) producers discovered that reclaimed asphalt pavement (RAP) is a valuable component in HMA. As a result, there has been renewed interest in increasing the amount of RAP used in HMA. While a number of factors drive the use of RAP in asphalt pavements, the two primary factors are economic savings and environmental benefits. RAP is a useful alternative to virgin materials because it reduces the use of virgin aggregate and the amount of virgin asphalt binder required in the production of HMA. Using RAP greatly reduces the amount of construction debris going into landfills, and it does not …