RT Journal Article
T1 Enhancing the viscoelastic properties of bituminous binders via thiourea-modification
A1 Cuadri Vega, Antonio Abad
A1 García Morales, Moisés
A1 Navarro Domínguez, Francisco Javier
A1 Partal López, Pedro
AB Although added in a very low concentration, bitumen controls the final properties and performance of the resulting asphalt mixture. As an alternative to classic bitumen modification with polymers, we herein propose the use of thiourea, which has proved to efficiently enhance the binder thermo-rheological properties in a broad temperature interval. As revealed by thermogravimetric and chemical analysis, benefits above may derive from new structures, probably formed by the interaction between ammonium thiocyanate and bitumen most polar fraction. Thus, flexural DMTA and dynamic shear tests demonstrated an improvement in the binder flexibility and an increase in its elasticity, at low and medium/high in-service temperatures, respectively. In addition, this research emphasizes the use of isothermal frequency sweep tests (and frequency/temperature-dependence conversion) as a means of achieving glass transition temperature values which, in contrast to isochronal temperature sweep tests, do not depend on the selected heating rate.
PB Elsevier
SN 0016-2361
YR 2012
FD 2012
LK http://hdl.handle.net/10272/12114
UL http://hdl.handle.net/10272/12114
LA eng
NO Cuadri Vega, A.A., García Morales, M., Navarro Domínguez, F.J., Partal López, P.: "Enhancing the viscoelastic properties of bituminous binders via thiourea-modification". Fuel. Vol. 97, págs. 862-868, (2012). DOI: 10.1016/j.fuel.2012.03.012
NO This work is part of a research project sponsored by a Junta de Andalucia (TEP6689) and also funded by “Ministerio de Educacion” through a Research Mobility Programme (Partal’s grant Ref. PR2010-0593) and the Cuadri’s F.P.U. research grant (AP2008-01419). Authors gratefully acknowledge their financial support.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026