Performance of foamed bitumen pavements in accelerated testing facility

Authors

  • Alvaro Gonzalez Universidad del Desarrollo (Chile)
  • Misko Cubrinovski University of Canterbury (New Zealand)
  • Bryan Pidwerbesky Fulton Hogan Ltd. (New Zealand)
  • David Alabaster New Zealand Transport Agency

DOI:

https://doi.org/10.4067/S0718-50732012000200001

Keywords:

pavement recycling, foamed bitumen, full-scale testing, rutting models

Abstract

One of the key principal goals of pavement asset management is to develop and implement cost-effective pavement construction and maintenance strategies that achieve the required levels of service and performance. A sustainable, cost-effective technique for rehabilitating pavements is foamed bitumen stabilization. This paper presents a study on the performance of foamed bitumen pavements tested in the Canterbury Accelerated Pavement Testing Indoor Facility (CAPTIF), for full scale testing of pavements. Six pavement sections were tested; the variables were bitumen and cement content; one control section with the untreated unbound material was tested. Results showed that surface deflections decreased at sections with higher bitumen contents. After the application of 5,710,000 Equivalent Standard Axles (ESAs), the sections stabilised with cement only, bitumen only, and the control section all showed large amounts of rutting. Conversely, little rutting was observed in the three sections stabilised with foamed bitumen and 1.0% cement, showing that cement and FB together significantly improve pavement performance. The rutting results were used to develop models to describe the stable and unstable performance of the tested pavements. The paper concludes by outlining some of the practical benefits of utilising this technology in pavement asset management.

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Published

2012-08-30

How to Cite

Gonzalez, A., Cubrinovski, M., Pidwerbesky, B., & Alabaster, D. (2012). Performance of foamed bitumen pavements in accelerated testing facility. Revista Ingeniería De Construcción, 27(2), 05–17. https://doi.org/10.4067/S0718-50732012000200001

Issue

Section

Original Research