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引用本文:桑国臣,樊敏,崔晓玲,朱轶韵,赵钦.压力成型相变储能砂浆的热性能与力学性能[J].建筑材料学报,2019,22(5):693-699
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压力成型相变储能砂浆的热性能与力学性能
桑国臣, 樊敏, 崔晓玲, 朱轶韵, 赵钦
西安理工大学土木建筑工程学院,陕西西安710048
摘要:
为协同提高储能砂浆的热性能与力学性能,采用压力成型方法制备了硫铝酸盐水泥基相变储能砂浆,并通过差示扫描量热法(DSC)、导热系数测试、红外热像法测试、强度试验及扫描电子显微镜(SEM)等方法,研究了压力成型相变储能砂浆的相变潜热、相变温度、导热性能、储热能力、力学强度及微观结构.结果表明:该相变储能砂浆的界面结合紧密、密实度高、导热能力强,并且在等相变材料含量下,具有更高的力学强度;当相变材料质量分数为25%时,与浇筑成型相比,压力成型可使相变储能砂浆在10℃和30℃下的导热系数分别提高602%和691%,且28d抗压强度、抗折强度分别提高277%和400%.
关键词:  压力成型  相变储能砂浆  热性能  力学性能  界面特征
DOI:103969/j.issn.1007 9629201905004
分类号:
基金项目:国家自然科学基金资助项目(51678482)
Thermal and Mechanical Properties of Phase Change Thermal Energy Storage Mortar Based on Compression Forming Method
SANG Guochen, FAN Min, CUI Xiaoling, ZHU Yiyun, ZHAO Qin
School of Civil Engineering and Architecture, Xian University of Technology, Xian 710048, China
Abstract:
In order to synergistically improve the thermal and mechanical properties of energy storage mortar, a sulphoaluminate cement based phase change thermal energy storage mortar was prepared by compression forming method. The influences of the dosage of phase change material(PCM) and compression forming method on the phase change latent heat, phase change temperature, thermal conductivity, heat storage efficiency, strength and microstructure of the thermal energy storage mortar were investigated by differential scanning analysis, thermal conductivity test, infrared thermal imaging test, strength test and scanning electron microscopy analysis. The results show that the thermal energy storage mortar has a tight interface, high compactness, strong thermal conductivity, and higher mechanical strength under the equivalent phase change material content. When the mass fraction of PCM to matrix material is 25%, the thermal conductivities of cement based phase change thermal energy storage mortar at 10℃ and 30℃ are increased by 602% and 691%, respectively. Meanwhile, the 28d compressive strength and flexural strength of phase change thermal energy storage mortar are increased by 277% and 400%, respectively.
Key words:  compression forming  phase change thermal energy storage mortar  thermal performance  mechanical property  interface characteristic
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