Experimental Evaluation of Thermal Cracking Characteristics of Reclaimed Asphalt Pavement Mixtures

Authors

  • Namir G. Ahmed Alkawaaz M. ASCE, M. ASTM, A/ Prof., Highways & Transportation Engineering Department, Al-Mustansiriyah University, Baghdad, Iraq
  • Halah A. Qasim Alaidarosi M.SC. Student, Highways & Transportation Engineering Department, Al-Mustansiriyah University, Baghdad, Iraq

Keywords:

Recycled Asphalt Pavement (RAP), HMA, Marshall Properties, Old Aggregate, Old Asphalt, Stress Intensity Factor.

Abstract

Meeting sustainability requirements in asphalt concrete pavements generally requires the process of recycled materials or the employment of energy saving technologies. The most common form of energy saving technology is the pavement recycling. Reclaimed Asphalt Pavements (RAP), which is normally created when existing asphalt concrete surfacing or crushing materials resulting from old asphalt pavements removal. This paper investigates the thermal cracking resistance of RAP laboratory-prepared Marshall asphalt concrete mixtures. The asphalt mixtures were produced with 0%, 5%, 10% and 15% RAP contents. The experimental testing program included Semi – Circular Bending test. The mechanical criteria for the performance of such mixtures against thermal cracking in this research is stress intensity factor.  The effects of different RAP contents on the stress intensity factor of the asphalt mixtures have been mainly investigated.  Moreover, the influences of testing temperatures and rate of loading have been observed. Test results revealed that the inclusion of 15 percent RAP significantly increased the stress intensity factor by 20, 27, and 78.8% for testing temperatures -10, 0, and 10?C respectively. The same trend appears with stress intensity factor at rate of loading (0.5 in/min).

References

[1] Federal Highway Administration (FHWA). 2015. Towards Sustainable Pavement Systems. Technical Advisory T-12001. Federal Highway Administration, Washington, DC.
[2] Copeland, A., et al. (2011). “Field Evaluation of a High Reclaimed Asphalt Pavement/Warm Mix Asphalt Project in Florida: A Case Study,” Transportation Research Record 2179, Transportation Research Board, Washington, DC.
[3] Gardiner, M.S., and Wagner, C., “Use of Reclaimed Asphalt Pavement in Superpave Hot Mix Asphalt.” Transportation Research Record, No. 1681, 1999, pp. 1-9
[4] Kanerva H.K., Vinson T.S., and Zeng H., “Low-Temperature Cracking: Field Validation of the Thermal Stress Restrained Specimen Test.” Strategic Highway Research Program, National Research Council, Washington DC, 1994.
[5] McDaniel, R.S., Soleymani, H., Anderson, R.M., Turner, P., and Peterson, R. Recommended Use of Reclaimed Asphalt Pavement in the Superpave Mixture Design Method.NCHRP Final Report (9-12), TRB, Washington, D.C., 2000.
[6] Iraqi General Specification for Roads and Bridges, (2003). “Standard Specification for Roads and Bridges." The state Corporation for Road and Bridges, Revised Edition.
[7] American Society for Testing and Materials. (2010). “Annual Book of ASTM Standards”, Volume 00.01. West Conshohocken, PA: ASTM International.
[8] AASHTO Guide for Design of Pavement Structures, (2010). The American Association of State Highway and Transportation Officials, Washington, D. C., USA.
[9] Li X, Marasteanu M., (2004). "Evaluation of low temperature fracture resistance of asphalt mixture using the semi- circular bend test.", Journal of the Association of Asphalt t Paving Technologists, 73, 867-76.
[10] Lim IL, Johnston IW, Choi SK, Boland JN., (1994). "Fracture testing of a soft rock with semicircular specimens under three-point bending. Part 1-mode I.", International Journal of Rock Mechanics and Mining Science, No. 3, 31, 185-97.

Downloads

Published

2016-10-08

How to Cite

Alkawaaz, N. G. A., & Alaidarosi, H. A. Q. (2016). Experimental Evaluation of Thermal Cracking Characteristics of Reclaimed Asphalt Pavement Mixtures. American Scientific Research Journal for Engineering, Technology, and Sciences, 26(1), 134–144. Retrieved from https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/2212

Issue

Section

Articles