Investigations on Water Vapor Adsorption-Desorption of Cementitious Materials and Its Induced Permeability under Isothermal Steady-State Flow

被引：10
作者：
Qian, Rusheng [1 ,2 ]
Fu, Chuanqing [1 ,2 ]
Zhang, Yu [3 ]
Sun, Guowen [4 ]
Jin, Rui [5 ]
Zhang, Yunsheng [3 ,6 ]
Kong, Deyu [1 ,2 ]
机构：
[1] Zhejiang Univ Technol, Coll Civil Engn & Architecture, Hangzhou 310023, Peoples R China
[2] Key Lab Civil Engn Struct & Disaster Prevent & Mit, Hangzhou 310023, Peoples R China
[3] Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Peoples R China
[4] Shijiazhuang Tiedao Univ, Sch Mat Sci & Engn, Shijiazhuang 050043, Peoples R China
[5] Zhejiang Construction Investment Grp Co, Ltd, Wensan Rd 20, Hangzhou 310013, Peoples R China
[6] Southeast Univ, Jiangsu Key Lab Construction Mat, Nanjing, Peoples R China
来源：
JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2024年 / 36卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Adsorption-desorption; Water vapor permeability; Isothermal steady-state flow; Nitrogen gas permeability; Porousmaterials; GAS-PERMEABILITY; MOLECULAR-DYNAMICS; COARSE AGGREGATE; PORE STRUCTURE; DIFFUSION; POROSITY; MICROSTRUCTURE; MULTISCALE; CONCRETE; SIZE;
D O I：
10.1061/JMCEE7.MTENG-16442
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
H2O(g) adsorption-desorption of cementitious materials and their permeability is a vital indicator for their durability designs, which significantly affects the occurrences of corrosion, carbonization and freeze-thawing, but its quantitative characterization has yet to be investigated in depth. In this study, H(2)O((g) )adsorption-desorption of cementitious materials with various w = cratios (0.35-0.55)and its induced permeability were investigated using a self-created cup apparatus under isothermal steady-state flow and compared with N-2 gas permeability by the modified Cembureau method. The results showed that the cementitious materials with a low w = c ratio have stronger water-holding characteristics, and there is an obvious inflection point in the adsorption curve [i.e., relative humidity (RH) = 70%]center dot H(2)O((g) )permeability measurement of cementitious materials was successfully carried out using a self-created cupapparatus, which is fundamentally an exponential function relationship to its N-2 gas permeability. The conversion relation is helpful to enhance the multimedium evaluations of durability for cementitious materials.DOI:10.1061/JMCEE7.MTENG-16442.(c) 2023American Society of Civil Engineers.
引用
收藏
页数：12
相关论文
共 42 条
  • [41] Multiscale lattice Boltzmann-finite element modelling of chloride diffusivity in cementitious materials. Part II: Simulation results and validation
    Zhang, Mingzhong
    Ye, Guang
    van Breugel, Klaas
    [J]. MECHANICS RESEARCH COMMUNICATIONS, 2014, 58 : 64 - 72
  • [42] Multi-scale study water and ions transport in the cement-based materials: from molecular dynamics to random walk
    Zhang, Wei
    Hou, Dongshuai
    Ma, Hongyan
    [J]. MICROPOROUS AND MESOPOROUS MATERIALS, 2021, 325
12345