利用pH值梯度研究建筑砂浆的酸蚀程度

Scrutiny of Acid Rain Corrosion Effect on Building Mortar on the Basis of pH Value Gradient

在两种不同ｐＨ值模拟酸雨和３种浸泡时间条件下，据ｐＨ值梯度测定了各类保护剂处理建筑砂浆试件的酸化层厚度，从而判定保护剂的保护效果，了解酸蚀程度。并分析了影响酸化层厚度的因素。

Every building mortar brick was respertively coated by acid-resistant materials and was immerged in simulated acid rains whose pH values were separately 2. 0 and 4.0. After scheduled time,the thickness of the acid-etched cross section of building mortar bricks was tested on the basis of pH value gradient and the influences on it were described in detail. The experiment and test verified that good acid-resistant materials were No.1#、7# and 4#.