首页 | 本学科首页   官方微博 | 高级检索  
     

建筑材料吸水过程中毛细管系数与吸水率关系的理论分析
引用本文:王立成.建筑材料吸水过程中毛细管系数与吸水率关系的理论分析[J].水利学报,2009,40(9).
作者姓名:王立成
作者单位:大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116024
基金项目:教育部科学技术研究重点项目,教育部创新团队项目 
摘    要:非饱和建筑材料的毛细吸水过程是造成建筑材料性能劣化的重要因素,它还将引起钢筋锈蚀。本文基于Darcy非饱和流体理论建立了建筑材料的吸水扩散模型,并推导出了非线性扩散方程的近似解析解。根据水分扩散系数与含水量的关系,建立了毛细管系数与吸水率之间的理论关系表达式,据此可通过累计吸水量试验预测水分渗透深度。与文献中试验结果的比较说明,本文提出的理论方法是可行的。

关 键 词:建筑材料  毛细吸水  毛细管系数  吸水率  非饱和

Analytical relationship between capillarity coefficient and sorptivity of building material
WANG Li cheng.Analytical relationship between capillarity coefficient and sorptivity of building material[J].Journal of Hydraulic Engineering,2009,40(9).
Authors:WANG Li cheng
Affiliation:Dalian University of Technology, Dalian 11024, China
Abstract:The capillary absorption of water under unsaturated state is an important factor causing the degradation of building materials. It also induces the corrosion of reinforcement. Based on the Darcy's unsaturated flow theory the diffusion model for describing the movement of water in building material is established and an analytical solution of the nonlinear equation is deduced. On this basis, the expression of the relationship between capillary coefficient and sorptivity is established according to the relationship between moisture diffusion coefficient and water content. Thus, the penetration depth or height of water movement in building material can be calculated based on the cumulative volume of water obtained by means of gravimentric test. The validity of this method is verified by experimental results published by other author.
Keywords:building material  capillary sorption  capillarity coefficient  sorptivity  unsaturated
本文献已被 万方数据 等数据库收录!
点击此处可从《水利学报》浏览原始摘要信息
点击此处可从《水利学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号