水泥基材料水分传输及数值模拟方法研究进展  

Research progress on moisture transport and numerical simulation methods of cement-based materials

作　　者：何锐[1] 郭健 胡元元 李荣 房建宏 HE Rui;GUO Jian;HU Yuan-yuan;LI Rong;FANG Jian-hong(School of Materials Science and Engineering,Chang'an University,Xi'an 710064,Shaanxi,China;Yaobai Special Cement Technology R&D Co.Ltd,Xi'an 710100,Shaanxi,China;Qinghai Research Institute of Transportation,Xining 810016,Qinghai,China)

机构地区：[1]长安大学材料科学与工程学院,陕西西安710064 [2]尧柏特种水泥技术研发有限公司,陕西西安710100 [3]青海省交通科学研究院,青海西宁810016

出　　处：《长安大学学报（自然科学版）》2023年第6期1-12,共12页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(52278429);陕西省重点研发计划项目(2022GY-422);陕西省交通科技项目(20-16K,21-50K)。

摘　　要：为了准确分析水分对水泥基材料性能的影响,从水分传输机理、孔结构对水分传输的影响以及水分传输的表征方法等方面系统总结了水泥基材料水分传输的研究进展,并对水泥基材料水分传输的研究发展趋势进行了展望。结果表明:水泥基材料在水分传输的驱动力主要来自渗透作用、扩散作用和毛细作用;连通孔作为水泥基材料水分传输的通道,其临界孔隙率、孔隙分布以及孔径大小等均会影响水分传输的速率;水泥基材料中水分传输虽然可以利用传统试验方法与现代无损测试方法对其进行研究,但是这些手段需要人工多次测量,不仅耗费大量的时间且误差较大,利用不同的数值模拟方法分析水泥基材料水分传输能够获得较好的结果。此外,目前对于水分在水泥基材料内部的传输,大多数研究都忽略渗透作用以及扩散作用的影响,而只是把毛细作用力作为水分传输的驱动力;且利用数值模拟的方法分析水泥基材料的水分传输时大多是在分子尺度上进行研究,并将水分视为一维传输。未来水泥基材料水分传输的研究首先是要系统的考虑水分传输的3个驱动力;其次,研究水分传输时最好采用多维的数值模型;最后,应当寻求更为先进的数值模拟方法分析水泥基材料的水分传输。To accurately analyze the effect of moisture on the properties of cement-based materials,the research progress of moisture transport in cement-based materials from the aspects of the moisture transport mechanism of cement-based materials was systematically summarized,the effect of pore structure on moisture transport,and the method of characterization of moisture transport,and the development trend of the research on moisture transport in cement-based materials was given.The results show that the driving force of moisture transport in cement-based materials mainly comes from osmosis,diffusion,and capillarity.The connecting pores,as the channel of moisture transport in cement-based materials,it's critical porosity,pore distribution,and pore size,which will affect the rate of moisture transport.Although moisture transport in cement-based materials can be investigated using traditional experimentation methods and modern non-destructive testing methods,these require multiple manual measurements,which are time-consuming and subject to considerable inaccuracies.The numerical simulation methods are used to analyze the moisture transport in cement-based materials to obtain better results.In addition,most of the scholars ignore the influence of osmosis and diffusion and only take the capillary force as the driving force of moisture transport in cement-based materials,and most of the numerical simulation methods to analyze the moisture transport in cement-based materials are carried out at the molecular scale,the moisture is regarded as a one-dimensional transport.Therefore,the future development trend of moisture transport in cement-based materials is to systematically consider the three driving forces of moisture transport firstly.Secondly,it is preferable to adopt multi-dimensional numerical models for the study of moisture transport.And lastly,more advanced numerical simulation methods should be sought to analyze the moisture transport in cement-based materials.3 figs,77 refs.

关 键 词：道路工程 水泥基材料 水分运移 数值模拟 研究进展 综述 

分 类 号：U414[交通运输工程—道路与铁道工程]