微胶囊相变材料对砂浆力学和热性能的影响
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内蒙古工业大学土木工程学院

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TU599

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Effect of Microencapsulated Phase Change Material on Mechanical and Thermal Properties of Mortar
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Inner Mongolia University of Technology

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    摘要:

    将微胶囊相变材料加入水泥砂浆中制成建筑储能砂浆,研究了储能砂浆的微观形貌、相变特性、热稳定性、导热系数、储热性能和力学性能。结果表明,储能砂浆的导热系数随着MPCM含量的增加而降低,储能砂浆芯材为固态时的导热系数大于芯材为液态时的导热系数。当MPCM含量为20%时,储能砂浆的表面峰值温度较水泥砂浆降低3.1 ℃,达到峰值温度的时间比水泥砂浆延迟20.5 min,其28 d 龄期抗压强度为9.3 MPa,具有足够的抗压强度和良好的储能调温效果,可用于建筑围护结构储能。

    Abstract:

    The energy storage mortar for buildings was developed by incorporating microencapsulated phase change material (MPCM) into cement mortar. The microscopic morphology, phase change characteristics, thermal stability, thermal conductivity, thermal and mechanical properties of energy storage mortar were investigated. The results show that the thermal conductivity of energy storage mortar decreases with the increase of MPCM. The thermal conductivity of the energy storage mortar when the PCM was solid was greater than that of the energy storage mortar when the PCM was liquid. The surface peak temperature of the energy storage mortar with 20% MPCM is 3.1 ℃ lower than that of the cement mortar, the time reaching the peak temperature delays 20.5 min than that of the cement mortar. Its compressive strength at the age of 28 days is 9.3 MPa. It can be used to store energy for the building envelope because it has sufficient compressive strength and good energy storage temperature regulation effect.

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  • 收稿日期:2022-01-01
  • 最后修改日期:2022-04-13
  • 录用日期:2022-04-14
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