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- W4200128197 abstract "Concrete structures in cold regions are often damaged by freeze-thaw action, which can seriously reduce their service life. How to actively reduce the freeze-thaw cycles suffered by the structures is key to enhance their freeze-thaw durability. In this paper, a composite pier protective technique with microencapsulated phase change material concrete (MPCMC) was proposed, including the MPCMC layer, the pure microencapsulated phase change material (MPCM) layer, the insulation layer, and the structure concrete (SC). To analyze the thermal control performance of the composite MPCMC pier, a 3-D heat transfer model with phase change were established. Combing the laboratory and field tests, a series of numerical simulations were conducted. The results indicated that the key parameters, including the thickness, phase change range, and thermal conductivity of the MPCMC layer and MPCM layer, and the thickness and thermal conductivity of the insulation layer, can determine the thermal control performance of the composite pier. An optimal composite structure was obtained considering the engineering cost. The optimal structure can effectively reduce the freeze-thaw cycles and extend its service life. Compared to the ordinary concrete pier, the maximum degree of reduction for freeze-thaw cycles can reach 94% and the maximum extension for service life can be 1470% at the freezing point of 0 °C. The study can provide some theoretical basis for the design of the freeze-thaw resistance of the concrete structure in cold regions and related researches." @default.
- W4200128197 created "2021-12-31" @default.
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- W4200128197 date "2022-01-01" @default.
- W4200128197 modified "2023-09-27" @default.
- W4200128197 title "Numerical investigation on the thermal control performance and freeze-thaw resistance of a composite concrete pier with microencapsulated phase change materials" @default.
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- W4200128197 doi "https://doi.org/10.1016/j.solener.2021.12.042" @default.
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