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contributor authorYong Chen
contributor authorYinghao Huang
contributor authorShuo Wang
contributor authorYanhu Mu
date accessioned2023-11-27T23:43:41Z
date available2023-11-27T23:43:41Z
date issued4/29/2023 12:00:00 AM
date issued2023-04-29
identifier otherJMCEE7.MTENG-15205.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4293794
description abstractFreeze–thaw cycles can deteriorate the expansive soil performance. Phase change materials (PCMs) absorb and store heavy latent heat from the environment, which can be utilized to mitigate freeze–thaw deteriorations in expansive soil. In this study, an environmentally friendly paraffin-based PCM was selected, which included two different forms: liquid (pPCM) and microcapsules (mPCM). The volume change, mechanical properties, thermal properties, and microstructure of the improved soil were studied. These results showed that PCMs can release considerable thermal energy during phase transitions, which improves the thermal stability of the soil. The pPCM enhanced the plasticity of soil and prevented brittle failure; mPCM reduced the damage to the soil microstructure caused by freeze–thaw cycles. Macroscopically, it weakened the swell–shrink behavior and limited the degradation of the resilient modulus, unconfined compressive strength, and failure strain of expansive soil. The optimal PCM content was determined based on the mechanical and thermal properties of the improved soil. This study provides a new idea for the engineering treatment of expansive soil in cold regions.
publisherASCE
titleEffects of Phase Change Materials on the Freeze–Thaw Performance of Expansive Soil
typeJournal Article
journal volume35
journal issue7
journal titleJournal of Materials in Civil Engineering
identifier doi10.1061/JMCEE7.MTENG-15205
journal fristpage04023206-1
journal lastpage04023206-14
page14
treeJournal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 007
contenttypeFulltext


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