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          1. Annual mold growth risk assessment of typical dwelling internal surfaces in high humidity areas

            Li Bicheng, Li Baizhan, Du Chenqiu, Cai Jiao, Yao Yinghui, Wang Yujue and Yao Runming

            2021.09.26

            The mold growth, depending on regional climates and building features, will do harm to not only building structure and surfaces but also human health. To discover the annual mold growth situation and its influence factors in Chongqing typical dwellings, reports the present status of indoor dampness/mold in Chongqing and analyses the elements related to mold growth by means of the large-sample cross-sectional questionnaire survey combining with the WUFI Plus and WUFI-Bio simulation method. The questionnaires and simulation results show that due to the improvement of building energy conservation design standards, there are significant differences among indoor moisture conditions of buildings built before 2001, from 2001 to 2010 and after 2010 in Chongqing, and the mildew degree of buildings before 2001 is significantly higher than that of buildings after 2001. Taking the buildings from 2001 to 2010 as examples, simulates the mold growth risk under four kinds of typical internal surfaces (cement mortar, wall paint, emulsion paint and wallpaper) and different air change rates. The results show that the water vapor diffusion resistance coefficient of different surfaces is remarkably correlative with mildew degree. The smaller the former, the lower the latter. The smallest mildew degree happens under 2 times of air change rate.

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