Anomalous diffusion during water absorption in porous building materials - Experimental evidence

被引：9
|
作者：
Ramos, N. M. M. [1 ]
Delgado, J. M. P. Q. [1 ]
de Freitas, V. P. [1 ]
机构：
[1] Univ Porto, LFC, Dept Civil Engn, Fac Engn, P-4200465 Oporto, Portugal
来源：
DIFFUSION IN SOLIDS AND LIQUIDS III | 2008年 / 273-276卷
关键词：
moisture diffusivity; anomalous diffusion; water sorption coefficient; building materials;
D O I：
10.4028/www.scientific.net/DDF.273-276.156
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The sorption and transport of water in two porous building materials, clay brick and autoclaved aerated concrete, was studied in detail. The evolution of the distribution of liquid in the porous medium was analysed in terms of the Boltzmann transform method and anomalous diffusion equation proposed by Kuntz and Lavallee [1]. The apparent moisture diffusion coefficients of water were determined from the total water profiles using a modified Boltzmann-Matano analysis, and a good agreement with literature values was found. The application of anomalous diffusion model to building materials indicates that the previous t(1/2) relation is not entirely accurate to estimate the volume of absorbed water. This result has particular relevance for evaluating the durability of building structures.
引用
收藏
页码：156 / 161
页数：6
相关论文
共 50 条
  • [1] Experimental evidence and theoretical analysis of anomalous diffusion during water infiltration in porous building materials
    Küntz, M
    Lavallée, P
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2001, 34 (16) : 2547 - 2554
  • [2] Neutron radiography study of water absorption in porous building materials: anomalous diffusion analysis
    El Abd, AEG
    Milczarek, JJ
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2004, 37 (16) : 2305 - 2313
  • [3] Anomalous water absorption in porous materials
    Lockington, DA
    Parlange, JY
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2003, 36 (06) : 760 - 767
  • [4] A TOOL TO PREDICT WATER ABSORPTION IN POROUS BUILDING MATERIALS
    Guimaraes, A. S.
    Ribeiro, I. M.
    de Freitas, V. P.
    JOURNAL OF POROUS MEDIA, 2017, 20 (02) : 127 - 141
  • [5] Confirmation of anomalous diffusion in non-saturated porous building materials by a new capillary rise absorption test
    Küntz, M
    Lavallée, P
    Chevalier, J
    Riopelle, P
    Goyer, M
    MASONRY: OPPORTUNITIES FOR THE 21ST CENTURY, 2002, 1432 : 259 - 272
  • [6] Experimental determination on the capillary water absorption coefficient of porous building materials: A comparison between the intermittent and continuous absorption tests
    Lu, Jiang
    Wang, Ke
    Qu, Ming-Liang
    JOURNAL OF BUILDING ENGINEERING, 2020, 28
  • [7] Nonisothermal moisture diffusion in porous building materials
    Galbraith, GH
    McLean, RC
    Gillespie, I
    Guo, J
    Kelly, D
    BUILDING RESEARCH AND INFORMATION, 1998, 26 (06): : 330 - 339
  • [8] Fluid Absorption and Diffusion in and between Porous Materials
    Shi, Xin
    Xiao, Shuangjiu
    14TH ACM SIGGRAPH INTERNATIONAL CONFERENCE ON VIRTUAL REALITY CONTINUUM AND ITS APPLICATIONS IN INDUSTRY, VRCAI 2015, 2015, : 23 - 26
  • [9] Fluid absorption and diffusion in and between porous materials
    20161502221259
    (1) Shanghai Jiao Tong University, China, 1600, ACM SIGGRAPH (Association for Computing Machinery, 2 Penn Plaza, Suite 701, New York, NY 10121-0701, United States):
  • [10] Some properties of porous building materials - Part III A theory of the absorption and transmission of water by porous bodies
    Madwick, E
    PHILOSOPHICAL MAGAZINE, 1932, 13 (85): : 632 - 641
12345