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首页> 外文会议>International Airfield and Highway Pavements Conference >Advances in Pavement Performance Enhancement with Dry Process Engineered Ground Tire Rubber
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Advances in Pavement Performance Enhancement with Dry Process Engineered Ground Tire Rubber

机译：干工艺工程地轮胎橡胶路面性能增强进展

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Ground Tire Rubber, or GTR, is gaining popularity as a recycled mixture component and performance-enhancing asphalt mix modifier in multiple U.S. states. This noticeable increase in usage has been driven by recent advances in production technologies, material specifications, modern asphalt mixture performance testing, cost-savings, and favorable field performance comparisons with polymer modified asphalt mixes. This paper details laboratory and field investigations of recent GTR designs, demonstration projects, and routine construction projects in Georgia, Virginia, Texas, Wisconsin, Illinois, and Missouri, including high-profile interstate and Tollway paving projects with up to 15 years of performance experience. Both terminal blend and dry process rubber asphalt modification techniques are investigated, with the latter involving a chemically engineered, dry GTR system designed to impart workability and performance characteristics beyond that achieved with simple GTR addition. Mix lab testing methods and procedures will be discussed, and recommendations will be presented regarding BMD with dry process rubber. Mixture performance and field tests indicate that GTR-modified, stone-mastic asphalt (SMA), open graded, and dense graded mixes can perform similarly to polymer-modified mixtures, but at significantly lower modification costs. Field data, economic data, and contractor feedback from several states will be presented, along with brief discussion of the application of an engineered crumb rubber (ECR)-modified mix used at ASCE Headquarters in Reston, VA.
机译：接地轮胎橡胶或GTR是在多个美国国家的再循环混合物组分和性能增强沥青混合改性剂中受到普及。这种明显的使用增加是通过生产技术，材料规格，现代沥青混合料性性能测试，成本节约和具有聚合物改性沥青混合物的有利场效比的推动的推动。本文详述了乔治亚州，弗吉尼亚州，德克萨斯州威斯康星州，伊利诺伊州和密苏里州的最近GTR设计，示范项目和常规建设项目的实验室和实地调查，包括高调州际公路和Tollway铺路项目，最多15年的性能经验。研究了端子混合物和干燥工艺橡胶沥青改性技术，后者涉及化学工程化的干燥GTR系统，旨在赋予通过简单的GTR加入实现的可加工性和性能特征。将讨论MIX实验室测试方法和程序，并将提出建议与干工艺橡胶的BMD。混合物性能和现场试验表明，GTR改性，石棉沥青（SMA），开放分级和致密分级混合物可以类似地与聚合物改性混合物相似，但在显着降低的修饰成本下。将介绍来自若干国家的现场数据，经济数据和承包商反馈，并介绍了在VA的ASCE总部使用的工程碎屑橡胶（ECR）制型混合物的应用。

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