新建建筑墙体湿传递特性研究

he moisture transfer characteristics of several typical wall of new building were analyzed through numerical calculation method. The influences of the initial moisture rate, indoor and outdoor relative humidity on moisture transfer of the wall were obtained. The results show that the initial moisture rate has little effect on the stable time of moisture content of wall. The stable time of moisture content of sintered clay bricks, aerated concrete and reinforced concrete wall is about 4 a, 2 a and 5 a, respectively. The moisture content of the three walls changes quickly during about the early 20 d, 40 d and 5 d after building completion, respectively. When the moisture content decay of the wall is stable, the average volume moisture content of reinforced concrete wall is the largest and sintered clay bricks wall is the least. The indoor and outdoor humidity have great effect on moisture content decay of wall. The moisture accumulation of the wall will be heavily and the periodic fluctuation range of the moisture content of the wall is large, when the indoor relative humidity reaches a certain value. As the moisture content decay is stable, the outdoor relative humidity is larger and the moisture content of wall is larger.