@Article{jrm.2022.018856,
AUTHOR = {Yong Chen, Yinghao Huang, Min Wu and Shuo Wang},
TITLE = {Fly Ash/Paraffin Composite Phase Change Material Used to Treat Thermal and Mechanical Properties of Expansive Soil in Cold Regions},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {10},
YEAR = {2022},
NUMBER = {4},
PAGES = {1153--1173},
URL = {http://www.techscience.com/jrm/v10n4/45337},
ISSN = {2164-6341},
ABSTRACT = {Phase change materials (PCMs) can store large amounts of energy in latent heat and release it during phase
changes, which could be used to improve the freeze-thaw performance of soil. The composite phase change material was prepared with paraffin as the PCM and 8% Class C fly ash (CFA) as the supporting material. Laboratory
tests were conducted to reveal the influence of phase change paraffin composite Class C fly ash (CFA-PCM) on
the thermal properties, volume changes and mechanical properties of expansive soil. The results show that PCM
failed to establish a good improvement effect due to leakage. CFA can effectively adsorb phase change materials,
and the two have good compatibility. CFA-PCM reduces the volume change and strength attenuation of the soil,
and 8 wt.% PCM is the optimal content. CFA-PCM turns the phase change latent heat down of the soil and
improves its thermal stability. CFA-PCM makes the impact small of freeze-thaw on soil pore structure damage
and improves soil volume change and mechanical properties on a macroscopic scale. In addition, CFA-8 wt.%
PCM treated expansive soil has apparent advantages in resisting repeated freeze-thaw cycles, providing a
reference for actual engineering design.},
DOI = {10.32604/jrm.2022.018856}
}