RT Journal Article
T1 Bitumen chemical modification by thiourea dioxide
A1 Cuadri Vega, Antonio Abad
A1 Partal López, Pedro
A1 Navarro Domínguez, Francisco Javier
A1 García Morales, Moisés
A1 Gallegos Montes, Críspulo
AB This work evaluates a novel bitumen modification through the use of a chemical agent, thiourea dioxide, substance which has been traditionally used as a reducing agent. Thermogravimetric analysis demonstrated the formation of new chemical compounds, most probably originated through reactions between products from thiourea dioxide thermal decomposition and some highly polar bitumen molecules. As a result of these reactions, which continues even after 60 days, bitumen permanent deformation resistance at high temperature is enhanced, as indicated by a significant increase in its viscosity and elastic features. On the other hand, thiourea dioxide addition produces changes in the bitumen colloidal nature, which improve its flexibility at low in-service temperatures, and consequently its resistance to thermal cracking under loading. In fact, dynamic bending tests indicated a remarkable decrease in the value of binder glass transition temperature, which was further corroborated by differential scanning calorimetry. As a conclusion, thiourea dioxide can be seen as a promising modifiying agent, which can extend the in-service temperature range at which bitumen would present a satisfactory performance.
PB Elsevier
SN 0016-2361
SN 1873-7153 (electrónico)
YR 2011
FD 2011
LK http://hdl.handle.net/10272/12098
UL http://hdl.handle.net/10272/12098
LA eng
NO Cuadri Vega, A.A., Partal López, P., Navarro Domínguez, F.J., García Morales. M., Gallegos Montes, C.: "Bitumen chemical modification by thiourea dioxide". Fuel. 2011, vol. 90, n. 6, págs. 2294–2300, (2011). DOI: 10.1016/j.fuel.2011.02.035
NO This  work  is  part  of  a  research  project  sponsored  by  a  MEC-FEDER Programme (Research   Project   MAT2007-61460)   and   by   a   Junta   de   Andalucía   Programme (TEP6689).  The  authors  gratefully  acknowledge  its  financial  support.  A.A.Cuadri  also acknowledges theconcession of MEC FPUresearch fellowship(AP2008-01419).
NO This work is part of a research project sponsored by a MEC-FEDER Programme (Research Project MAT2007-61460) and by a Junta de Andalucia Programme (TEP6689). The authors gratefully acknowledge its financial support. A.A. Cuadri also acknowledges the concession of MEC FPU research fellowship (AP2008-01419).This work is part of a research project sponsored by aMEC-FEDER Programme (Research Project MAT2007-61460) andby a Junta de Andalucía Programme (TEP6689). The authorsgratefully acknowledge its financial support. A.A.Cuadri alsoacknowledges the concession of MEC FPU research fellowship(AP2008-01419).
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026