摘要
研究近零能耗居住建筑围护结构的力学性能和保温性能,有利于为现场施工相变材料掺量提供理论依据。以硬脂酸和月桂酸为相变材料制备相变混凝土砂浆,研究了不同相变混凝土围护结构的性能变化。结果表明,随着相变复合体系替代比例的增加,相变混凝土围护结构的密度、塌落度、抗压强度、抗拉强度、墙体中心温度峰值和侧面温度峰值均下降。相变复合体系替代比例为30%时,相变混凝土围护结构满足C45的强度等级要求,相比普通混凝土,相变混凝土围护墙体中心温度峰值降低幅度为9.7%,侧面温度峰值降低幅度为12.4%。相变复合体系替代比例为50%时,相变混凝土围护结构满足C30的强度等级要求,相比普通混凝土,相变混凝土围护墙体中心温度峰值降低幅度为16%,侧面温度峰值降低幅度为23.5%。
Studying the mechanical and thermal insulation properties of the enclosure structure of nearly zero energy residential buildings is beneficial for providing theoretical basis for the dosage of phase change materials in on-site construction.A phase change concrete mortar was prepared using stearic acid and lauric acid as phase change materials,and the performance changes of different phase change concrete enclosure structures were studied.The results indicate that as the replacement ratio of phase change composite system increases,the density,slump,compressive strength,tensile strength,peak temperature at the center and side of the phase change concrete enclosure structure all decrease.When the replacement ratio of the phase change composite system is 30%,the phase change concrete enclosure structure meets the strength grade requirement of C45.Compared with ordinary concrete,the peak temperature at the center of the phase change concrete enclosure wall decreases by 9.7%,and the peak temperature at the side decreases by 12.4%.When the replacement ratio of the phase change composite system is 50%,the phase change concrete enclosure structure meets the strength grade requirements of C30.Compared with ordinary concrete,the peak temperature at the center of the phase change concrete enclosure wall decreases by 16%,and the peak temperature at the side decreases by 23.5%.
作者
孙庆龙
丁晓欣
Sun Qinglong;Ding Xiaoxin(Jilin Jianzhu University,Changchun,130119)
出处
《制冷与空调（四川）》
2024年第3期345-350,共6页
Refrigeration and Air Conditioning
基金
吉林省科技创新项目(JC2022124)。
关键词
近零能耗
建筑
围护结构
换热性能
Near zero energy consumption
Architecture
Surrounding structure
Heat exchange performance
作者简介
孙庆龙(1996-),男,在读硕士研究生,E-mail:1649805530@qq.com;通讯作者:丁晓欣(1964-),女,硕士,教授,E-mail:17643195720@163.com。
