Numerical study on the effect of phase change materials on heat transfer in asphalt concrete

Refaa, Zakariaa; Kakar, Muhammad Rafiq; Stamatiou, Anastasia; Worlitschek, Jörg; Partl, Manfred N.; Bueno, Moisés

doi:10.1016/j.ijthermalsci.2018.07.014

Cited by 52 publications

(18 citation statements)

References 31 publications

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“…This paper introduces a new approach to identify the effect of μPCM in asphalt binders using rheological measurements. Additionally, the findings of this study corroborate experimental and numerical investigations showing that a reduction in pavement surface temperatures between 2°C and 9°C can be obtained with μPCM modified asphalt materials, as compared with non-μPCM modified asphalt materials ( 6, 11 ). Finally, the re-design of an asphalt mixture with μPCM is demonstrated, and the mechanical performance implications of incorporating a significant portion of μPCM in the mixture are discussed.…”

supporting

confidence: 86%

Environmentally Tuning Asphalt Pavements Using Microencapsulated Phase Change Materials

Montoya

Betancourt-Jimenez

Rahbar-Rastegar

et al. 2022

Transportation Research Record: Journal of the Transportation R

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Environmental conditions are considered an important factor influencing asphalt pavement performance. The addition of modifiers, both to the asphalt binder and the asphalt mixture, has attracted considerable attention in potentially alleviating environmentally induced pavement performance issues. Although many solutions have been developed, and some deployed, many asphalt pavements continue to fail prematurely because of environmental loading. The research reported here investigates the inclusion of microencapsulated phase change material (μPCM) in asphalt binders and mixtures to help reduce environmental damage to asphalt pavements. The μPCM particles are formulated to absorb and release thermal energy as the particles liquify and solidify, depending on pavement temperature. As a result, μPCM can provide asphalt pavements with thermal energy storage capacities to reduce the impacts of drastic ambient temperature scenarios and minimize the appearance of critical temperatures within the pavement structure. By modifying asphalt pavement materials with μPCM, it may be possible to “tune” the pavement to the environment. Through rheology, differential scanning calorimetry, thermal cycling, and dynamic modulus testing, this work attempts to capture the μPCM effect and link the behavior between μPCM modified asphalt binders and mixtures. This study identifies a novel approach to determine when the μPCM effect occurs using rheological measurements. Additionally, the thermal and mechanical performances of μPCM modified asphalt mixtures are evaluated. An asphalt mixture design method is demonstrated to systematically incorporate a substantial portion of μPCM particles in a reference mixture. The findings extend the thermomechanical understanding of μPCM modified asphalt binders and mixtures.

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supporting

confidence: 86%

Environmentally Tuning Asphalt Pavements Using Microencapsulated Phase Change Materials

Montoya

Betancourt-Jimenez

Rahbar-Rastegar

et al. 2022

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

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“…In asphalt roads, several numerical models have been developed to predict temperatures under real weather conditions that take into account the presence of PCMs in asphalt concrete pavements 10,11 . However, although the benefits of PCMs for modifying asphalt roads appear very promising and would prevent temperature-related failures, their practical feasibility in this field has been addressed only recently.…”

Section: Introductionmentioning

confidence: 99%

Modification of asphalt mixtures for cold regions using microencapsulated phase change materials

Bueno

Kakar

Refaa

et al. 2019

Sci Rep

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Phase change materials (PCMs) may be used to regulate the temperature of road surfaces to avoid low-temperature damages when asphalt materials become brittle and prone to cracking. With this in mind, different asphalt mixtures were modified with microencapsulated phase change materials (i.e. tetradecane) to assess their thermal benefits during the phase change process. Likewise, the effect on the mechanical performance of PCMs as a replacement of mineral filler was assessed. Special attention was paid to dry and wet modification processes for incorporating the PCMs into the mixtures. The results showed that PCM modifications are indeed able to slow down cooling and affect temperatures below zero. Approximately, a maximum of 2.5 °C offset was achieved under the tested cooling conditions compared to the unmodified reference specimens. Regarding the mechanical response at 0 °C and 10 °C, the results indicated that the PCM modification significantly reduces the stiffness of the material in comparison with the values obtained for the reference mixture.

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“…This means, for instance, pavements with self-changing optical appearance for improving visibility during the night or in case of frost. It may also mean pavements with inbuilt phase change materials (PCM) in order to mitigate temperature peaks in the pavement [8]. Efforts are also ongoing on developing pavements that are ''vaccinated'' with particles as crack healing promotors, such as micro-capsules containing softening agents or electromagnetically sensitive particles that can be activated trough induction or alternating magnetic fields [2].…”

Section: Some Future Pavement Developments Relevant For Rilemmentioning

confidence: 99%

Towards improved testing of modern asphalt pavements

Partl

2018

Mater Struct

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During the last 50 years, Rilem was continuously active in pre-standardization efforts aiming at gradually improving scientific and technological testing and analysis methods for refined understanding and characterization of bituminous binders and asphalt, both under well-defined laboratory and performance driven in-field conditions. This paper intends to highlight and provide a short overview on the international activities of Rilem's to date 18 technical committees (TC) on asphalt and bituminous binders. After some general background information, underlining the specific complexity of asphalt pavement materials in terms of rheological behavior and basic structural functioning, it is shown that these activities resulted in numerous recommendations, state of the art reports and conference proceedings, all produced on a voluntary basis by scientific and technical commitment of individual experts. This wealth of results was created by the TCs following an own systematic methodology for many years which, at the end of the day, allowed building up activities through the new TCs of today in a much more specialized but at the same time also more diverse way. In view of this new flexibility and keeping in mind the previous success story of Rilem towards improved testing of asphalt pavements, future developments, challenges and interdisciplinary issues regarding bituminous road materials are outlined as potential starting point for future TC initiatives.

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Numerical study on the effect of phase change materials on heat transfer in asphalt concrete

Cited by 52 publications

References 31 publications

Environmentally Tuning Asphalt Pavements Using Microencapsulated Phase Change Materials

Environmentally Tuning Asphalt Pavements Using Microencapsulated Phase Change Materials

Modification of asphalt mixtures for cold regions using microencapsulated phase change materials

Towards improved testing of modern asphalt pavements

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