Performance, strength and deformational characteristics of foamed bitumen pavements

This paper presents a laboratory study and a full-scale study carried out on a specific New Zealand granular material containing 1 per cent cement and different foamed bitumen contents. The objective was to study the effects of foamed bitumen in the performance and behaviour of pavements. In the laboratory, Indirect Tensile Strength (ITS) tests, Monotonic Load Triaxial (MLT) and Repeat Load Triaxial (RLT) tests were conducted. The results showed that an increase of foamed bitumen content up to an ‘optimum’ content, increases the ITS but, at the same time, decreases both the permanent deformation resistance measured in RLT tests and the peak strength in MLT tests. The full-scale test on foamed bitumen pavements was conducted in the Canterbury Accelerated Pavement Testing Indoor Facility (CAPTIF). 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 per cent cement, showing that cement and foamed bitumen together significantly improve pavement performance. (a) For the covering record of the conference, please refer to ITRD no. E218387.

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  • Publication Date: 2009-10


  • English

Media Info

  • Pagination: 20P (DAY 3, SESSION 2)
  • Monograph Title: Australian Asphalt Paving Association thirteenth international flexible pavements conference, Sunday 11th - Wednesday 14th October, Surfers Paradise, Queensland, Australia

Subject/Index Terms

Filing Info

  • Accession Number: 01153064
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Mar 23 2010 9:14AM