Sorptivity of Porous Construction Gypsum Plasters

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Abstract:

To understand the water transport properties and generally the mass and heat transfer performance, the sorptivity of different building gypsum plasters are investigated by experiments. The sorptivity of five kinds of gypsum materials are measured and compared with that of fired clay brick. The effects of water/plaster ratio, wet/dry cycles and lightweight additives on the absorbing properties are investigated. The “square root of t” law and the validity of sharp water front (SWF) model are also analysed. It is concluded that the absorption properties of gypsum plasters are sensitive to premixed lightweight aggregates, water/plaster ration and wet-dry cycles

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440-443

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August 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] D K Doran, Construction Materials Reference Book, Butterworth-Heinemann Ltd. (1990)

Google Scholar

[2] DA Lockington, J Y Parlange (2003), Anomalous water absorption in porous materials, Journal of Physics D-Applied Physics, Vol. 36, pp.760-767.

DOI: 10.1088/0022-3727/36/6/320

Google Scholar

[3] Q. Wang, Modeling and Experimental Research on the Moisture Transports Within Porous Construction Materials, PhD Thesis, University of Luton. 2005.

Google Scholar

[4] Q Wang, K Ahmet, Y Yue and L Y Li, Determination of the unsaturated hydraulic diffusivity of porous construction materials from transient moisture profiles utilizing pin-type resistance sensor array, Journal of Materials Science. Vol.40, No. 4,(2005)

DOI: 10.1007/s10853-005-6522-3

Google Scholar

[5] BS 1191-2: 1973, British Standard, Specification for Gypsum building plasters —Part 1, premixed lightweight plasters.

DOI: 10.3403/00053076u

Google Scholar

[6] M A Wilson, A study of water flow in porous construction materials, PhD Thesis, The University of Manchester Institute of Science and Technology, 1992.

Google Scholar

[7] C Hall and K M Tse, Water movement in porous building materials -Ⅶ. The sorptivity of mortars, Building and Environment, Vol.21, pp.113-118, (1986)

DOI: 10.1016/0360-1323(86)90017-x

Google Scholar

[8] BS 5492:1990, British Standard: Code of practice for Internal plastering, 1990.

Google Scholar

[9] C Hall, W D Hoff and M A Wilson (1993), Effects of non-sorptive inclusions on capillary absorption by a porous materials, Journal of Physics D: Applied Physics, Vol. 26, pp.31-34.

DOI: 10.1088/0022-3727/26/1/006

Google Scholar