脱硫石膏灌芯墙干燥时间影响因素分析

关键字：脱硫石膏,干燥时间,相对湿度

（1.东华理工大学 建筑工程学院，江西 南昌  330013；2.华东交通大学 土木建筑学院，江西 南昌  330013；3.同济大学 先进土木工程材料教育部重点实验室，上海  201804）

    摘要：通过采用不同厚度的脱硫石膏浆样品，改变珍珠岩掺量和环境相对湿度，覆盖纸面石膏板对石膏浆体干燥蒸发过程进行实验比较分析。结果表明，脱硫石膏浆体的干燥时间与其厚度呈现非线性增长关系；珍珠岩掺量却对脱硫石膏浆体干燥行为影响较小；环境相对湿度的增加显著延长了石膏浆体的干燥时间，环境相对湿度从55%增加到75%时，脱硫石膏浆体完全干燥时间延长了近1倍；纸面石膏板的覆盖在高环境相对湿度（75%）下对脱硫石膏的干燥时间影响较小，但在低环境相对湿度（55%）下干燥时间急剧延长，可达2倍。
    关键词：脱硫石膏；干燥时间；相对湿度
    中图分类号：TU52；TQ177.3       文献标识码：A       文章编号：1001-702X（2017）06-0070-03

Analysis of influencing factors on drying time of desulfurization gypsum core grouted wall
DING Yang1，2，3，WEI Yongqi1，3，ZHOU Shuangxi2
（1.School of Civil Engineering，East China University of Technology，Nanchang 330013，China；2.School of Civil Engineering and Architecture，East China Jiaotong University，Nanchang 330013，China；3.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education，Tongji University，Shanghai 201804，China）

    Abstract：This paper using gypsum paste samples with different thickness，by changing the content of perlite and the relative humidity of the environment，to compare and analyze the drying evaporation process of paper-covered plasterboard on gypsum paste. The experimental results show that the drying time of gypsum paste and its thickness presented nonlinear growth，the content of perlite has little effect on drying behavior of gypsum paste；the increase of the environmental relative humidity significantly prolongs the drying time of gypsum paste，when environmental relative humidity increases from 55% to 75%，the desulfurization gypsum paste of complete drying time prolongs nearly 1 time；plasterboard covered in high relative humidity environment（75%） has little effect on the drying time of FGD gypsum，while the drying time prolongs at low relative humidity（55%） environment，up to 2 times.
    Key words：FGD gypsum，drying time，relative humidity