我国部分沿海地区,分布着盐碱性土壤,俗称盐碱地,这些地区四季呈海洋性气候;夏季潮湿而多雨,其它三季多为风沙天气,土壤及空气中含有一定量的盐碱成份,常年地下水位较高,在这种盐碱及潮湿的海洋性气候环境的循环作用下,建筑物的外墙面尤其是受雨水冲刷及地下水位冲击的部位受到严重侵蚀,在投入使用几年后,普遍不同程度地出现下列问题。 1.清水墙,随建成时间不同有不同程度的破坏现象,尤其是建筑物根部或勒脚以下部位,轻者上碱,墙面出现呈地图状的白色盐碱结晶,风化严重 In some coastal areas of China, there are saline and alkaline soils, commonly known as saline-alkali soils. These regions have marine climate in all seasons. In summer, they are humid and rainy. The other three seasons are mostly wind-sand. The soil and air contain a certain amount of saline-alkali components, and perennial groundwater levels. High, under the cyclical effect of this saline-alkaline and humid marine climate, the external walls of the building are severely eroded especially by rainwater erosion and groundwater level impacts. After a few years of use, they are generally different. The following problems occur to a certain extent. 1. Clear water wall, with different degrees of destruction of the built-up time, especially in the roots of the building or under the foot, light on the alkali, the wall appeared on the map of the white salt and alkali crystals, severe weathering