不同封装技术的相变泡沫混凝土力学和蓄热性能

Mechanical and Thermal Storage Properties of Phase Change Foamed Concrete with Different Encapsulation Techniques

摘要: 选取以石蜡为主要材料制成的相变材料微胶囊材料和石蜡–石墨定型材料掺入泡沫混凝土，分别制作两种相变泡沫混凝土。并对两种相变泡沫混凝土的抗压强度、导热性能、气孔微观构造，蓄热特性进行测试与分析。结果表明：适量的掺加相变材料可以增强泡沫混凝土的抗压强度，掺加P-G材料的泡沫混凝土更明显；泡沫混凝土的导热系数随着两种材料的加入先减小后增大，掺加MPCM的泡沫混凝土整体抗导热性优于掺加P-G材料的泡沫混凝土；掺加相变材料使泡沫混凝土具有了一定的蓄热储能能力，其蓄热能力大小与材料掺量有直接关系。

Abstract: Microencapsulated phase change materials primarily composed of paraffin and paraffin-graphite composite phase change materials were incorporated into foamed concrete to produce two types of phase change foamed concrete. The compressive strength, thermal conductivity, pore microstructure, and thermal storage characteristics of the two types of phase change foamed concrete were tested and analyzed. The results show that an appropriate amount of phase change materials can enhance the compressive strength of foamed concrete, with a more pronounced effect when using P-G material. The thermal conductivity of foamed concrete initially decreases and then increases with the addition of both materials, with foamed concrete incorporating MPCM showing better overall thermal resistance than that with P-G material. Incorporating phase change materials endows foamed concrete with a certain thermal storage capacity, directly related to the amount of material added.