RT Journal Article
T1 Rheological and phase behaviour of paraffin wax/bitumen blends with thermal storage characteristics
A1 Gutiérrez Blandón, Coraima
A1 Cuadri Vega, Antonio Abad
A1 Tenorio Alfonso, Adrián
A1 Partal López, Pedro
A1 Navarro Domínguez, Francisco Javier
AB This paper analyses the thermomechanical properties, heat storage characteristics and compatibility of bitumen blends with a paraffin wax, having a melting point around 60 ◦C, as phase change material. To that end, temperature sweeps in the linear viscoelastic range, technological properties, Modulated Differential Scanning Calorimetry (MDSC), and cross-polarised optical microscopy observations were carried out on blends and pure compounds. The obtained results reveal a partial compatibility between the compounds and the development of a multiphasic microstructure, where the paraffin-rich or bitumen-rich domains form the continuous phase depending on the concentration, with the phase inversion around 20 wt% wax. Below this threshold concentration, the disperse paraffin-rich phase acts as filler that reinforces the continuous bitumen matrix until it reaches the melting transition. Above the critical concentration for the phase inversion, the continuous paraffin- rich phase controls the rheological response. However, both phases retain their own identity and show their individual transitions and relaxations. Despite the partial compatibility, a high degree of crystallinity is found, especially for high paraffin contents, which would result in a significant capacity to store thermal energy, for applications such as solar thermal collection or thermoregulation materials for buildings, etc.
PB Elsevier
SN 0950-0618
SN 1879-0526 (electrónico)
YR 2023
FD 2023-08-16
LK https://hdl.handle.net/10272/22452
UL https://hdl.handle.net/10272/22452
LA eng
NO Gutiérrez-Blandón, C., Cuadri, A. A., Tenorio-Alfonso, A., Partal, P., & Navarro, F. J. (2023). Rheological and phase behaviour of paraffin wax/bitumen blends with thermal storage characteristics. In Construction and Building Materials (Vol. 401, p. 132826). Elsevier BV. https://doi.org/10.1016/j.conbuildmat.2023.132826
NO This work is part of the projects TED2021-131284B-I00 and PID2020-116905RB-I00 funded by MCIN/AEI/10.13039/ 501100011033 (Spanish Ministry of Science and Innovation) and European Union “NextGenerationEU” and the Cátedra Fundación CEPSA edition 2022. Adrián Tenorio also acknowledges financial support from Junta de Andalucía through the post-doctoral Grant POSTDOC_21_00644, co-funded by the EU Fondo Social Europeo (FSE).
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026