复合相变储能材料在大体积混凝土中的控温性能  

Temperature Control Properties of Composite Phase Change Materials in Mass Concrete

作　　者：周双喜[1] 荣茂阁[1] 左晟[1] 杨雷[1] 郑惠英[1] 吴坤鑫[1] 熊超琴[1] 杨明[1] 

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013

出　　处：《华东交通大学学报》2013年第4期30-34,共5页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(51168015)

摘　　要：针对大体积混凝土易出现的温度裂缝问题,利用相变储能材料(PCM)在特定温度范围内的热效应来控制大体积混凝土内部温度场,降低了混凝土内部温度应力,有效防止大体积混凝土温度裂缝的出现。利用自行设计的温度测试系统,测试了标准尺寸试件的内部温度场。对比分析了单一相变材料、复合相变材料及微胶囊相变材料的控温性能和材料性能。研究结果表明:相变控温材料能使大体积混凝土内部温度变化速率趋于平缓,有效阻止因水化热所引起的早期热裂缝,且对混凝土强度影响不大;相变材料的复合工艺对控温性能也有一定影响。研究结果能较好的解决大体积混凝土的温度裂缝问题,具有较好的推广应用前景。This paper aims to solve the problem of temperature crack in mass concrete.The internal temperature stress of mass concrete can be reduced owing to thermal effects of phase change stored energy material（PCM） in particular range to control internal temperature field,and then temperature crack can be prevented effectively.This study measures the internal temperature fields of standard size specimens by using self-designed temperature testing system,and compares temperature control performance and material properties of single,composite and microcapsule phase change stored energy material.The research results show that PCM can not only prevent thermal crack at early stage by retard temperature variation rate in mass concrete effectively,but also has little influence on concrete strength.The composite process of phase change stored energy material（PCM） has some effects on temperature control performance.

关 键 词：复合相变材料 大体积混凝土 温度裂缝 

分 类 号：TU528[建筑科学—建筑技术科学]