RT Journal Article
T1 The development of polyurethane modified bitumen emulsions for cold mix applications
A1 Carrera Páez, Virginia
A1 Cuadri Vega, Antonio Abad
A1 García Morales, Moisés
A1 Partal López, Pedro
AB 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 60ºC 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.
PB Springer Verlag
SN 1359-5997
SN 1871-6873 (electrónico)
YR 2015
FD 2015
LK http://hdl.handle.net/10272/12102
UL http://hdl.handle.net/10272/12102
LA eng
NO Carrera Páez, V., Cuadri Vega, A.A., García Morales, M., Partal López, P.: "The development of polyurethane modified bitumen emulsions for cold mix applications". Materials and Structures.  Vol. 48, n. 10, págs. 3407-3414, (2015). DOI: 10.1617/s11527-014-0408-2
NO 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 Educacion" for the concession of a F.P.U. research grant (AP2008-01419).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).
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026