水泥混凝土吸收相变材料的影响因素研究  

Research on Affecting Factors of Absorption of PCM in Concrete

作　　者：周靓[1] 石伟[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064

出　　处：《武汉理工大学学报（交通科学与工程版）》2014年第3期641-644,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：为了研究水泥混凝土吸收相变材料(PCM)的影响因素,通过借鉴混凝土吸收常数K的测定方法和自行设计的室内吸收试验,以混凝土对PCM的吸收常数K和吸收深度作为评价指标,研究分析了混凝土水化龄期、试验温度、浸入时间、水泥混凝土内部结构、PCM的粘度、PCM的极性,以及氢键对吸收过程的影响.结果表明:混凝土吸收PCM是一个复杂的过程;混凝土对PCM的吸收量随时间的增加最终将趋于一个稳定状态;混凝土中的凝胶孔、毛细孔或者其他开口孔隙、裂缝等的都会影响其对PCM的吸收;PCM的粘度越小越利于被混凝土吸收;氢键的存在阻碍混凝土对PCM的吸收;试验温度和水泥混凝土试块龄期间接影响了混凝土对PCM的吸收.In order to study the factors affecting the absorption and retention of PCM in concrete,using the experience of technique for the determination of constants for the absorption of PCM in concrete and self-design indoor absorption test,taking absorption constant K and depth of PCM penetration as evaluation index,this paper studied the influence of age of the concrete,test temperature,duration of immersion in the liquid PCM,concrete structure itself,viscosity of the PCM,polarity of the PCM and hydrogen bonding.The result shows that：Absorption of phase change materials in concrete is a complicated process;the amount of PCM being absorbed in concrete tends to be stable with the time increase;the size and form of the gel and capillary pores as well as other openings such as voids and fissures in the matrix will affect the volume of the space necessary for the storage and flow of PCM;the lower viscosity for PCM,the easier to be absorbed;hydrogen bonding retarded the speed of penetration;test temperature and the age of concrete will also affect absorption.

关 键 词：水泥混凝土 相变材料 直接浸泡法 影响因素 吸收常数K 吸收深度 

分 类 号：U414[交通运输工程—道路与铁道工程]