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Structural Coefficients of Cold Central-Plant Recycled Asphalt Mixtures
| 题名： | Structural Coefficients of Cold Central-Plant Recycled Asphalt Mixtures |
| 其他题名： | AASHTO.(1993)."AASHTO guide for the design of pavement structures."Washington,DC. |
| 正文语种： | 英文 |
| 作者： | M. A. Díaz-Sánchez |
| 关键词： | temperature；application；section；central；cycling；mixture；technology；layer；ccpr；observe |
| 摘要： | Two full-scale pavement sections built in 2012 at the National Center for Asphalt Technology (NCAT) Test Track were used to assess the structural contribution of cold central-plant recycling (CCPR) with 100％ reclaimed asphalt pavement (RAP) and foamed asphalt as a recycling agent (CCPR-foam). The two test sections performed effectively, presenting no evidence of pavement damage during a two-year period of accelerated traffic loading in which 10 million equivalent single-axle loads (ESALs) were applied. Furthermore, ride quality was not significantly affected with the application of traffic. Frequent deflection testing over the duration of the study revealed that CCPR-foam exhibited a similar response to temperature as that observed for conventional asphalt concrete (AC). A procedure based on backcalculated modulus data was followed to determine the structural layer coefficients for the CCPR-foam layers. The layer coefficients were found to vary from 0.14 to 0.15 cm～(−1) (0.36–0.39 in.～(−1)). Quantifying the structural coefficient allows this material to be effectively used in the AASHTO empirical method of pavement thickness design currently employed by many U.S. states. |
| 出版年： | 2017 |
| 论文唯一标识： | P-72Y2017V143N06009 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/JTEPBS.0000005 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 143 |
| 期： | 06 |
| 页码： | 70-76 |
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