Quantitative model of moisture redistribution in dual layer concrete slabs with regards to hysteresis

Magnus Åhs & Magnus Åhs
Moisture in a drying concrete slab redistributes subsequent to installing semi-permeable flooring, hence increasing the surface humidity beneath it. Such a humidity increase may be substantial in terms of relative humidity, RH, even though the redistributed moisture content appears insignificant. This comparably large increase originates from the hysteresis, moisture history dependence, exhibited by sorption isotherms for cement based materials. In contrast to retracing the desorption isotherm pursued when drying, the material moisture content traces a...
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