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Pro084-1

A METHOD TO DETERMINE WATER VAPOUR DESORPTION AND ADSORPTION ISOTHERMS FOR CEMENTITIOUS MATERIALS: USING THE FEWEST EXPERIMENTAL DATA



Author(s): Z. Zhang, M. Thiéry, V. Baroghel-Bouny
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 275-285
Total Pages: 961
Language : English


Abstract: Water vapour sorption isotherms (WVSIs) are one of main material properties that are important for modelling of moisture transport in porous medium, such as cementitious materials. However, measurements of WVSIs are time-consuming. In this paper, we have proposed a method that uses the fewest measured data to predict both desorption and adsorption isotherms. Experimental data have been collected from the literature to verify the proposed simplified method. We concluded that for OPC materials three points on the desorption isotherm and two point on the adsorption isotherm are enough to calculate both curves. For high performance materials, one or more points are needed to predict the desorption curve. One statistical criterion developed based on and MME were used to quantify the proposed method. Results show that this new method has the same prediction accuracy with using the original experimental data. The proposed method not only can save experimental time but also can reduce the measurement cost.


Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00


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