Abstract
As shown in preceding part of this paper, linealized governing heat and moisture transfer equations do not apply to high humidities in foam concrete plate. This report presents a novel analysis considering the hysteresis effect in moisture content. In first part of this report hysteresis scanning curves of ALC are analyzed based on Everett's independent domain theory. Predicted volues of this model show good agreement with measured valures of the hysteresis scanning curves. The governing heat and moisture equations with allowance of moisture capacity variation on the hysteresis effect are solved with numerical solution and compared with the experimental results in the high humidity range. It is shown that there are large Hysteresis effect. The predicted values of moisture uptake and temperature variation show excelent agreement with the experimental results at high humidity condition. It is concluded that the deviations at the linear model from the experimental results can be explained by considering the sorption hysteresis of material and the hysteresis effect must be considered at high humidity condition for the precise analysis of heat and moisture flow through foam concrete bodies.
