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- W614434170 abstract "Past studies have indicated binder from reclaimed asphalt pavement (RAP) aggregates do not fully blend within the hot mix asphalt (HMA), resulting in a partial degree of blending (DOB). The degree of blending is defined as the percentage of RAP binder that is effectively mobilized within the mix. This study will focus on determining the impact of DOB on predicted pavement performance using MEPDG level I analysis of 25% RAP mixes with three RAP sources. Dynamic complex modulus tests were conducted on each RAP source with two conditions: full blending and a calculated “Actual” DOB. Most state agencies assume full blending, which is an assumption that may lead to under asphalting or a relatively stiffer mix. However, it is unclear how this will affect the predicted pavement performance. For the full blending samples, it was assumed that all of the RAP binder was mobilized in the mix, and the virgin binder was offset accordingly. The “Actual” DOB samples were mixed after a DOB was determined. MEPDG level I analysis was conducted using typical structures, climate, and traffic conditions for the state of New Jersey. Also rutting and fatigue cracking performance between the two DOBs were compared for each of the RAP sources. The results indicate DOB has a negligible effect on fatigue and rutting performance for the three RAP sources tested, all of which had high actual DOB’s, greater than 85%. Therefore, for RAP with such high DOB values, full blending assumption would be cost effective and would not compromise the pavement performance. However, RAP variability will need to be controlled to ensure quality performance." @default.
- W614434170 created "2016-06-24" @default.
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- W614434170 date "2013-01-01" @default.
- W614434170 modified "2023-09-23" @default.
- W614434170 title "Determining Impact of Degree of Blending Between Virgin and Reclaimed Asphalt Binder on Predicted Pavement Performance Using Mechanistic-Empirical Pavement Design Guide" @default.
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