Abstract
Bitumen emulsions stand for an alternative paving practice to the traditional hot-mix asphalts. In addition, modified bitumen emulsions show a better performance than unmodified ones. This work studies the feasibility of obtaining polyurethane modified bitumen emulsions, in which an isocyanate-functionalized polyol constitutes the bitumen modifier (in varying concentration from 1 to 4 wt%). Storage stability and high in-service performance are evaluated by means of evolution of droplet size distribution (DSD) and rheology tests, respectively. Regarding the emulsion stability, the key factor seems to be the bitumen modifier concentration used to prepare the modified emulsions. Thus, for a selected 50 wt% bitumen fraction, there is a limit concentration (between 1 and 2 wt%) above which the emulsion becomes unstable under storage. Hence, this result limits the modifier content that can be used in the emulsion and the final level of modification achieved if compared to the original non-modified emulsion. On the other hand, the rheological characterization conducted on the emulsion residues at 60 °C has shown an improved resistance to deformation. In terms of applicability, polyurethane modified bitumens allows for the obtaining of modified emulsions which can be prepared at much lower temperatures than those derived from other polymers.
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REFERENCES
Airey GD (2004) Styrene butadiene styrene polymer modification of road bitumens. J Mater Sci 39:951–959
Bahia HU, Hislop WP, Zhai H, Rangel A (1998) Classification of asphalt binders into simple and complex binders. J Assoc Asphalt Pav 67:1–41
Cao TY, Xu YS, Su YC, Long F, Li X, Hu YH (1990) Study of particle morphology in polymer and their minimum film formation temperatures. J Appl Polym Sci 41:1965–1972
Carrera V, Partal P, García-Morales M, Gallegos C, Páez A (2009) Influence of bitumen colloidal nature on the design of isocyanate-based bituminous products with enhanced rheological properties. Ind Eng Chem Res 48:8464–8470
Ecker A (2001) The application of Iatroscan-technique for analysis of bitumen. Petrol Coal 43:51–53
Fawcett AH, McNally T (2001) Blends of bitumen with polymers having a styrene component. Polym Eng Sci 41:1251–1264
Gaestel C, Smadja R, Lamminan KA (1971) Contribution a la connaissance des proprietes des bitumes routiers. Rev Gen Routes et Aerodromes 466:85–94
García-Morales M, Partal P, Navarro FJ, Martinez-Boza FJ, Gallegos C, González N, González O, Muñoz ME (2004) Viscous properties and microstructure of recycled EVA modified bitumen. Fuel 83:31–38
García-Morales M, Partal P, Navarro FJ, Gallegos C (2006) Effect of waste polymer addition on the rheology of modified bitumen. Fuel 85:936–943
Giavarini C, Mastrofini D, Scarsella M, Barré L, Espinat D (2000) Macrostructure and rheological properties of chemically modified residues and bitumens. Energy Fuel 14:495–502
He G, Wong W (2006) Decay properties of the foamed bitumens. Constr Build Mater 20:866–877
Hunter RJ (1989) Foundations of colloids science. Oxford University Press, Oxford
Jenkins KJ, Molenaar AAA, de Groot JLA, van de Ven MFC (2000) Developments in the uses of foamed bitumen in road pavements. Heron 45:167–176
Kandhal PS, Cooley LA (2003) Accelerated laboratory rutting tests: evaluation of the asphalt pavement analyser. National cooperative highway research program report, vol 508. National Academy Press, Washington
Lesueur D (2011) Polymer modified bitumen emulsions (PMBEs). In: McNally T (ed) Polymer modified bitumen, 1st edn. Woodhead Publishing Limited, Cambridge, pp 25–43
Lu X, Isacsson J, Ekblad J (2003) Influence of polymer modification on low temperature behaviour of bituminous binders and mixtures. Mater Struct 36:652–656
Martín-Alfonso MJ, Partal P, Navarro FJ, García-Morales M, Gallegos C (2008) Use of a MDI-functionalized reactive polymer for the manufacture of modified bitumen with enhanced properties for roofing applications. Eur Polym J 44:1451–1461
Masson JF (2008) Brief review of the chemistry of polyphosphoric acid (PPA) and bitumen. Energ Fuel 22:2637–2640
Ni H, Skaja AD, Soucek MD (2000) Acid-catalyzed moisture-curing polyurea/polysiloxane ceramer coatings. Prog Org Coat 40:175–184
Perry RH, Green DW (1999) Perry’s chemical engineers’ handbook. Mc Graw Hill, New York
Read J, Whiteoak D (2003) The shell bitumen handbook. Surrey, UK
Segura DM, Nurse AD, McCourt A, Phelps R, Segura A (2005) Chemistry of polyurethane adhesives and sealants. In: Cognard P (ed) Handbook of adhesives and sulfur modified bitumen sealants. Elsevier, Oxford, pp 101–162
Smagulova N, Kairbekov Z, Aubakirov E, Yermoldina E (2012) Production of bitumens from coal sources modified by elementary sulfur. Adv Mat Res 535–537:1815–1818
Tadros TF, Vincent B (1983) Encyclopedia of emulsion technology, Becher edn. Marcel Dekker, New York
Tasdemir Y (2009) High temperature properties of wax modified binders and asphalt mixtures. Constr Build Mater 23:3220–3224
Weiss J, McClements DJ (2000) Influence of Ostwald ripening on rheology of oil-in-water emulsions containing electrostatically stabilized droplets. Langmuir 16:2145–2150
Acknowledgments
This work is part of two research projects sponsored by a MEC-FEDER Programme (Research Project MAT2007-61460) and by a Junta de Andalucia Programme (TEP6689). The authors gratefully acknowledge their financial support. A.A. Cuadri also thanks “Ministerio de Educación” for the concession of a F.P.U. research grant (AP2008-01419).
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Carrera, V., Cuadri, A.A., García-Morales, M. et al. The development of polyurethane modified bitumen emulsions for cold mix applications. Mater Struct 48, 3407–3414 (2015). https://doi.org/10.1617/s11527-014-0408-2
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DOI: https://doi.org/10.1617/s11527-014-0408-2