Numerical simulation of the influence of pores sizes on moisture migration dynamic in masonry wall

  • Authors

    • N. M. Nde University of Douala Cameroon
    • D. Fokwa University of Douala Cameroon
    • M. Mbessa
    • T. T. Tamo
    • C. Pettang
    2021-09-28
    https://doi.org/10.14419/ijet.v10i2.31190
  • Mathematical Modeling, Migration, Moisture, Numerical Simulation, Pore Size
  • The sometimes extreme hydro-climatic stresses that buildings undergo can lead to significant deterioration which can lead to their collapse. The concern to realize durable works and ensuring a comfortable framework for the life of occupants leads to seek effective solutions, as well for the new construction as for the renovation of old construction, answering the sempiternal problem of harmful action of water on buildings materials. This paper proposes a numerical simulation of moisture migration in concrete building walls, the aim being to highlight the influence of pore size on the kinetics of moisture migration, and its gradient in the wall. A mathematical model taking into account the mechanisms of moisture migration due to liquid moisture gradient and by vapor diffusion is proposed; the discrete formulation of the equa-tion by the numerical scheme of Crank Nicolson is then carried out, and results from computer modeling using Matlab software version 7.10.0.499 (R2010a), show that pore size is a key parameter that influences the dynamics of moisture migration in the wall. Indeed, this parameter qualitatively and quantitatively influences the kinetics of moisture migration, as well as it gradient in the concrete wall. It appears a greater migration dynamic when the pores sizes decrease, means a greater kinetics of moisture migration and lower moisture gradient in the walls at the hygrometric equilibrium, for a decreasing pore size.

     

  • References

    1. [1] Lukic, I. (2015) Influence of mineral admixtures on water absorption of lightweight aggregate concrete. Scientific Conference, Planing, Design, Construction and Building Renewal, NOVI SAD, 25-27.

      [2] Nilforoushan, Reza, M. (2005) The effect of micro silica on permeability and chemical durability of concrete used in the corrosive environment. Iran. J. Chem. And Chem. Eng.

      [3] Bajja, Z. (2017) Influence de la microstructure sur le transport diffusif des pâtes, mortiers et béton à base de CEM I avec ajout de fumée de silice. Thèse de Doctorat, Université Paris -Saclay, Ecole normale Supérieure CACHAN, p. 245

      [4] Moussa, A. L., Mutuku, R., and Thuo, Joseph. (2018) effect of iron powder ( ) on strength workability, and porosity of the binary blended concrete. Open Journal of Civil Engineering, Scientific Research and Publishing, 8, 411-425.

      [5] Oltulu, M. and Sahin, R. (2013) Effect of nano- , nano- and nano- powder on compressive strength and capillary water absorption of cement mortar containing fly ash: comparative study. Energy and Building, 58, 292-301. https://doi.org/10.1016/j.enbuild.2012.12.014.

      [6] Mohseni, E. et al. (2015) Single and combined effects of nano- , nano- and nano- on the mechanical, rheological and durability properties of self-compacting mortar containing fly ash.

      [7] Djima, M. O. A., Mang’uriu, N. G and Mwero, J. N. (2018) Experimental investigation of lime treated palm kernel shell and sugarcane bagasse ash as partial replacement of coarse aggregate and cement respectively in concrete. Open Journal of Civil Engineering, Scientific Research and Publishing, 8, 358-372. https://doi.org/10.4236/ojce.2018.84027.

      [8] Malab, S., Benaissa, A., Boudraa, S. E and Aggoum, S. (2009) Drying kinetics of self-compacting concrete. Turkish Journal of Engineering and Environmental Science, 33, 135-145.

      [9] Goual, M. S., Bali, A and Quéneudec, M. (2003) Influence de la structure poreuse sur le transfert d’humidité dans les matériaux poreux de génie civil ‘‘application au béton argileux cellulaire’’. Seminaire International de Géomatériaux GEOMAT’02, Université Mohamed Boudiaf de M’sila.

      [10] Suchorab, Z. et al. (2014) Volatil organic compound protection against moisture in building materials. Ecological Chemistry and Engineering, p 12.

      [11] Ghashghali, H. T. and Hassani, A. (2016) Investigating the relationship between porosity and permeability coefficient for pervious concrete pavement by statistical modelling. Material Sciences and Applications, Scientific Research and Publishing, 7, 101-107. https://doi.org/10.4236/msa.2016.72010.

      [12] Suchorab, Z., Widomski, M., Lagod, G and Sobczuk, H. (2010) Capillary rise phenomenon in aerated concrete. Monotoring and simulation. Lublin University of Technology.

      [13] Philip, J.R. and De Vries, D.A. (1957) Moisture movement in porous materials under temperature gradients. s.l. : Transaction of American Geophysical Union, Vol. 38, pp. 222-232. https://doi.org/10.1029/TR038i002p00222.

      [14] Thomson, W. (1871) On the equilibrium of vapour at a curved surface of liquid, Philosophical Magazine, series 4, 42(282), 448-452. https://doi.org/10.1080/14786447108640606.

      [15] Bordachev, A. (2010) Moisture Calculation analysis and injection methods in brick masonry walls. Saimaa University of Applied Sciences, Lappeenranta, 71p.

      [16] Lamis, K. (2012) Fiabilité Des Performances Energétiques Des Bâtiments. Mémoire de Master STEU, Université Libanaise, Faculté De Génie III –Hadath.

      [17] Abahri, K., Belarbi, R and Trabelsi, A. (2011) Contribution to analytical and numerical study of combined heat and moisture transfers in porous building materials. Building and Environment, 46, 1354 – 1360. https://doi.org/10.1016/j.buildenv.2010.12.020.

      [18] Fitsum, T., Kumar, K and Fazio, P. (2010) Transient model for coupled heat, air and moisture transfer through multilayered porous media. International Journal of Heat and Mass Transfer, 53, 3035–3044. https://doi.org/10.1016/j.ijheatmasstransfer.2010.03.024.

      [19] Ketelaars, A. A. J., Pel, L., Coumans, W. J and Kerkhof, P. J. (1995) Drying kinetics: a comparison of diffusion coefficients from moisture concentration profiles and drying curves. Chemical Engineering Science, 50, 1187-1191. https://doi.org/10.1016/0009-2509(94)00494-C.

      [20] Nytsch-Geusenet et al. (2005) A hygrothermal building model based on the object-oriented modeling language modelica. Ninth International IBPSA Conférence, Montréal, Canada, 15-18.

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  • How to Cite

    M. Nde, N., Fokwa, D., Mbessa, M., T. Tamo, T., & Pettang, C. (2021). Numerical simulation of the influence of pores sizes on moisture migration dynamic in masonry wall. International Journal of Engineering & Technology, 10(2), 164-169. https://doi.org/10.14419/ijet.v10i2.31190