Thermal and rheological performance of asphalt binders modified with expanded graphite/polyethylene glycol composite phase change material (EP-CPCM)

Show simple item record

dc.contributor.author Zhang, Dong
dc.contributor.author Chen, Meizhu
dc.contributor.author Wu, Shaopeng
dc.contributor.author Riara, Martin M.
dc.contributor.author Wan, Jiuming
dc.contributor.author Li, Yuanyuan
dc.date.accessioned 2019-02-19T10:13:22Z
dc.date.available 2019-02-19T10:13:22Z
dc.date.issued 2019-01
dc.identifier.citation Construction and Building Materials, Volume 194, 10 January 2019, Pages 83-91 en_US
dc.identifier.issn 0950-0618
dc.identifier.uri https://ac.els-cdn.com/S0950061818326771/1-s2.0-S0950061818326771-main.pdf?_tid=4544cbf2-51d6-4deb-ba85-486ff5414567&acdnat=1550570927_adedc25feb3df71740b239644002cb5f
dc.identifier.uri http://repository.seku.ac.ke/handle/123456789/4367
dc.description https://doi.org/10.1016/j.conbuildmat.2018.11.011 en_US
dc.description.abstract Phase change materials (PCMs) can be used as thermal regulation units to prevent thermal diseases of asphalt pavements. However, the effects of PCMs on the thermal and rheological properties of asphalt binders still need to be further studied. Therefore, the influence of an expanded graphite/polyethylene glycol composite phase change material (EP-CPCM) on the thermal and rheological performance of a Pen 60/80 base binder and a SBS modified binder were investigated in this research. Various experiments were conducted, and the thermal constants analyses show that the thermal conductivity gaps of the EP-CPCM modified base and SBS asphalt binders are lower than 8%, indicating a favorable compatibility between EP-CPCM and the asphalt binders. The thermal conductivity and thermal diffusivity of base and SBS binders are doubled after the incorporation of EP-CPCM, which ensures a rapid heat exchange with the ambient environment. Differential scanning calorimeter (DSC) results indicate that the melting and crystallization enthalpies of the EP-CPCM modified base binders are 13.77 J/g and 10.22 J/g respectively, meanwhile, the melting and crystallization enthalpies of the SBS binders are 14.63 J/g and 13.59 J/g respectively. The heating and cooling rate of the modified binders are separately reduced at the temperature range of 40–50 °C and 35–25 °C because of the phase transition of EP-CPCM. Dynamic shear rheometer (DSR) results reveal that both the rutting parameter G*/sinδ and the fatigue parameter G*sinδ of the modified binders are increased when the EP-CPCM is added, indicating the rutting resistance is improved while the fatigue resistance is damaged. Bending beam rheometer (BBR) tests show that the addition of EP-CPCM results in the decrease in the creep rate and the increase in the creep stiffness of the modified binders, and both effects are detrimental to the prevention of low-temperature cracking. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Asphalt binder en_US
dc.subject Composite phase change materials en_US
dc.subject Expanded graphite en_US
dc.subject Polyethylene glycol en_US
dc.subject Rheological performance en_US
dc.subject Thermal properties en_US
dc.title Thermal and rheological performance of asphalt binders modified with expanded graphite/polyethylene glycol composite phase change material (EP-CPCM) en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search Repository


Browse

My Account