一种测定建筑物外墙表面黏附粉尘的方法

提出了一种测定建筑物外墙表面黏附粉尘的方法.该方法具体步骤包括1)选择建筑物外墙面污染有代表性的部位,确定建筑外墙的粉尘采样面积,通常取0 1～0 5 m2; 2)用玻璃烧杯量取适量蒸馏水,作为从外墙面采得粉尘的载体,通常一次测定使用的蒸馏水为0 1～0 5 L; 3)用干净小刷子或布片将圈定面积的外墙表面打湿,将粉尘搽洗到蒸馏水中; 4)将含有悬浮粉尘的蒸馏水用超声波振动分散,适宜时间和温度分别为2～5 min和20～35 ℃;5)测定单位面积墙面黏附粉尘质量,通过激光粒度分析仪测定溶液的粉尘浓度和分散度(如果粉尘浓度较大,可制作粉尘涂片,在显微分析系统上测定粉尘的粒径分散度).含尘溶液产生泡沫时会影响测定效果,因此测定粉尘浓度前需先加消泡剂消泡.该测定与评价方法对评价建筑物表面粉尘的污染程度和清洁剂效果等具有重要意义.

A renovated method for measuring dust adhesion onto the wall of buildings

In this paper the author wants to introduce a method he has developed to measure the dust adhesion on the building walls. The procedures of using the said method can be stated as follows:(1) Selecting a typical plot of area on the wall of a building as the dust sampling area,which is usually of 0.1-0.5 m2; (2) Using a beaker with a certain amount of distilled water of about 0.1-0.5 L,by which the dust collected from the wall can be dissolved; (3) Using a small cleaning brush or a piece of wetting cloth for ...