Correlation between the Properties of Superpave Binder and Engineering Properties of Recycled Aged CRM Mixtures

재생 CRM 바인더와 혼합물의 성능 상관성 연구

Kim, Hyun Hwan;Jeong, Kyu Dong;Lee, Moon Sup;Lee, Soon Jae

  • Received : 2015.04.06
  • Accepted : 2016.03.28
  • Published : 2016.04.14


PURPOSES : The performance properties (indirect tensile strength, rutting resistance, and resilient modulus) of recycled aged CRM mixtures and their correlation with Superpave binder properties (viscosity, high failure temperature, $G^*sin{\delta}$, and stiffness) were investigated. METHODS: A series of Superpave binder tests was performed by using a rotational viscometer, DSR, and BBR to evaluate the performance properties. In addition, the CRM mixes were artificially aged through accelerated aging processes, and their properties were evaluated. The correlation between the properties of recycled aged CRM binders and the engineering properties of recycled aged CRM mixtures was experimentally determined. RESULTS : The rut depth values decreased and the ITS values increased with increasing high failure temperature. In general, the resilient modulus properties seemed to be poorly correlated with the high-temperature values, regardless of the aggregate source. CONCLUSIONS: The recycled aged CRM binders and mixtures can lead to satisfactory performance, and the properties of these binders are strongly correlated with the engineering properties of the mixtures.


crumb rubber;recycling;rubberized binder;engineering properties


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