室内湿净化砂浆缓冲性能试验研究

针对南方建筑物室内过高、过低的湿环境对人体健康产生的不利影响,采用自制的室内湿净化砂浆进行湿度调节,并将其与普通水泥砂浆作对比,利用扫描电镜SEM、双气路氮吸附法BET、双气路氮吸附法BJH对砂浆内部结构进行测试,静态吸附法测试砂浆的等温吸附/解吸曲线以及吸附速率曲线,并采用NORDTEST项目方案,对砂浆的湿缓冲值进行测试.试验结果表明:木纤维、海泡石和膨胀珍珠岩按一定的比例成型后的WSE基复合多孔砂浆可以作为室内湿净化材料基,加入掺合料达到相关性能的同时并不影响材料的湿缓冲功能;复合多孔砂浆吸附能力优于普通水泥砂浆,最大吸附量达到了普通水泥砂浆的2倍;WSE基复合多孔砂浆湿缓冲值介于0.5~1.0,是普通砂浆的3.5倍,可作为一类调湿材料应用于室内湿环境的净化.

Experimental study on buffering performance of moisture purification mortar

Regarding of impact on human health due to the excessively low and wet environment in buildings in southern China, indoor moisture purification mortar was adopted to adjusthumidity by using custom indoormoisture purification mortar. Moreover, the performance of the custom mortar was compared with ordinary cement mortarin this paper.Scanning Electron Microscopy(SEM), BET surface area analyzer and BJH method were used to study the interior structure of mortar, and measure the isothermaladsorption/desorption curve and adsorption rate curve by using static adsorption method. Meanwhile, moisture buffering values proposed by NORDTEST project scheme for mortars were tested. Results showed that the WSE(wood fibre, sepiolite, expanded perlite)based composite porous mortar could be used as indoor moisture purification material base; the added admixture could achieve relevant properties without affecting the moisture buffering function of mortar.WSE based mortar has an excellent internal pore structure distribution and is sensitive to moisture. The adsorption ability of composite porous mortar is better than the ordinary cement mortar, and the maximum adsorption capacity of the former is as high as 2 times the latter.The moisture buffering value of composite porous mortar is between 0.5 and 1, and about 3.5 times the ordinary cementy mortar. Therefore, the composite porous mortar can be used as a sort of humidity control material in the purification of indoor wet environment. 