The Effects of Bituminous Binders on Cold Recycled Mixes Prepared by the Foamed Bitumen Technology

Abstract:

The foamed bitumen technology is experiencing a global renaissance and rather extensive development of innovative approaches with respect to both, its application and research, is clearly visible. However, the variability of available bituminous binders for utilization within the technology is quite large; therefore, a general methodology of quality parameters determination for foamed bitumen and the requirements for mixes bound by this type of binder must be specified.In general different types of pen grade bituminous binders can be used for producing the foam. Besides the pen grades which are defined by penetration and also its viscosity, the source of the bitumen can have important effect on final foamed bitumen quality given especially by its expansion ratio and stability of the foam as well. Experimental study has been done to compare different types of bitumen from different sources to assess the effects on the foamed bitumen and on cold recycled mixes produced by these binders. In parallel the effect of a suitable foaming agent has been assessed as well. The foamed bitumen was analyzed by its expansion ration, half time defining the stability of the foam and the so called foam index. Cold recycled mixes were produced with one type of reclaimed asphalt material and different foamed bituminous binders. For the mix assessment mainly indirect tensile strength, water susceptibility and stiffness modulus have been considered. Results and comparison of the evaluated effects are presented in this paper.

• Periodical: Applied Mechanics and Materials (Volume 802)
• Pages: 315-320
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.802.315
• Online since: October 2015
• Authors: Jan Suda*, Jan Valentin
• Keywords: Cold Recycled Mixes, Expansion Ratio, Foam Bitumen, Foam Index, Half-Life Time, Indirect Tensile Strength

References

[1] K.J. Jenkins , Mix Design Considerations for Cold and Half-warm Bituminous Mixes with emphasis on Foamed Bitumen, PhD Dissertation, University of Stellenbosch, South Africa, (2000).

[2] M. Iwański, A. Chomicz-Kowalska, Laboratory Study on Mechanical Parameters of Foamed Bitumen Mixtures in the Cold Recycling Technology, Procedia Engineering, 57, ISSN 1877-7058 (2013).

DOI: 10.1016/j.proeng.2013.04.056

[3] M. Brennen, et. al., Laboratory Investigation of The Use of Foamed Asphalt for Recycled Bituminous Pavements. In: Asphalt materials, mixtures, construction, moisture effects and sulfur. Washington, DC, Transportation Research Record: 911 (1983).

[4] L.H. Castedo-Franco, L.E. Wood, Stabilisation with Foamed Asphalt of Aggregate Commonly Used in Low Volume Road. In: Low volume road: 3rd International Conference, (1983).

[5] P.J. Ruckel, S.M. Acott, R.H. Bowering, Foamed- Asphalt Paving Mixtures: Preparation of Design Mixes and Treatment of Test Specimens. In: Asphalt materials, mixtures, construction, moisture effects and sulfur. Washington, DC: Transportation Research Record 911, (1982).

[6] D. Lesueur, et al., Foamability and Foam Stability. Road materials and pavement design, Paris, 5(3) (2004) pp.277-302.

DOI: 10.1080/14680629.2004.9689973

[7] Ministry of Transportation Czech Republic: Technical conditions TP208, Pavement cold recycling, Department of Road Infrastructure, Prague, in Czech, (2009).

[8] L.J. Milton M.G. Earland, Design Guide and Specification for Structural Maintenance of Highway Pavements by Cold In-Situ Recycling, TRL Report 386, Crowthorne, (1999).

[9] Wirtgen Cold Recycling Technology 2012, 1st edition, Windhagen, Germany, (2012).

[10] Asphalt Academy: Technical guideline: bitumen stabilised materials, TG2, Asphalt Academy, CSIR Built Environment, Pretoria, South Africa, (2009).

[11] AUSTROADS: Technical Report – Review of Foamed Bitumen Stabilisation Mix Design Methods, Austroads Publication No. AP–T178/11, ISBN 978-1-921709-77-7, (2011).

[12] C.T. Chiu M.Y. Huang, A Study on Properties of Foamed Asphalt Treated Mixes. Chung Hua University, Department of Civil Engineering, No. 30 Tung Shiang, Taiwan, (2002).

[13] A.F. Bissada, Structural Response of Foamed-Asphalt-Sand Mixtures in Hot Environments. In: Asphalt materials and mixtures. Washington, DC, Transportation Research Record: 1115, (1987) pp.134-149.

[14] R. Chandra,A. Veeraragavan J.M. Krishnan, Evaluation of Mix Design Methods for Reclaimed Asphalt Pavement Mixes with Foamed Bitumen, Procedia - Social and Behavioral Sciences, 104 (2013) 2-11.

DOI: 10.1016/j.sbspro.2013.11.092

[15] D. Merrill,M. Nunn,I. Carswell, A Guide to the Use and Specification of Cold Recycled Materials for the Maintenance of Road Pavements. TRL Report 611, Crowthorne, (2004).

[16] S. Maccarone,G. Holleran D.J. Leonard, and S. Hey, S, Pavement Recycling Using Foamed Bitumen. Proceeding 17th ARRB Conference, Part 3, (1994).