Virgin and Aged Binder Interaction Measured on Mixture Bars via Repeated Creep in the Dynamic Shear Rheometer

Jesse D. Doyle ； Isaac L. Howard ； Alejandro Alvarado

《International Journal of Pavement Research and Technology》 6卷6期 (2013/10) Pp. 721-729

https://doi.org/10.6135/ijprt.org.tw/2013.6(6).721

並列摘要

A repeated creep (RC) test was performed on mixture bars in the dynamic shear rheometer (DSR) to investigate the interaction of aged Reclaimed Asphalt Pavement (RAP) binder and virgin binder in different mixtures. The focus of the paper was testing compacted specimens made from 100% RAP and virgin binder. Three RAP sources were tested with three different virgin asphalt contents and two different 100% RAP mixing temperatures. A total of 144 torsion bars were prepared and tested. The overall result of the investigation was that the RC test does not appear optimal for the purpose of evaluating the interaction of 100% RAP mixed with virgin binder. One of the difficulties encountered was preparing torsion bars over a wide range of RAP material properties and virgin asphalt contents. The RC test was able to detect RAP source and virgin asphalt content, but was not able to capture potential differences in mechanical response due to differences in specimen mixing temperature.

並列關鍵字

Asphalt mixtures ； Dynamic shear rheometer ； RAP ； Repeated creep ； WMA

參考文獻

Mallick, R.B., Bradley, J.E., and Bradbury, R.L. (2007). An Evaluation of Heated Reclaimed Asphalt Pavement Material and Wax-Modified Asphalt for Use in Recycled Hot Mix Asphalt. Transportation Research Record, No. 1998, pp. 112-122.

Doyle, J.D., Howard, I.L., and Robinson, W.J. (2012). Prediction of Absorbed, Inert and Effective Bituminous Quantities in Reclaimed Asphalt Pavement. Journal of Materials in Civil Engineering, 24(1), pp. 102-112.

Doyle, J.D., and Howard I.L. Thermal Cracking Potential of High RAP WMA Evaluated with Bending Beam Rheometer Mixture Beam Test, Journal of Testing and Evaluation, 41(2), pp. 236-246.

Howard, I.L., Doyle, J.D., and Cox, B.C. (2013). Merits of Reclaimed Asphalt Pavement-Dominated Warm Mixed Flexible Pavement Base Layers, Road Materials and Pavement Design, 14(2), pp. 106-128.

Reinke, G., Glidden, S., Herlitzka, D., and Jorgenson, J. (2005). Laboratory Investigation of HMA Performance Using Hamburg Wheel Tracking and DSR Torsional Creep Tests. Journal of ASTM International, 2(10), pp. 50-81.