青海察格高速公路项目工程桥涵构造物砼盐渍土地区防腐技术的分析借鉴

我国的西北部是盐碱地分布比较广泛的地区,其特点就是盐渍土的腐蚀尤其严重。高浓度晶间卤水或者盐渍土壤对由混凝土浇筑的高速公路的的迫害作用相当强。这样的盐渍土地区环境中的硫酸、盐和氯盐和水泥石极易发生化学作用,而且还有物理作用造成的破坏,因为盐类结晶在结构的干湿变化部位基因膨胀,造成公路混凝土开裂,很大程度的减少了公路的使用寿命。所以说,对于盐渍土地区的公路建设各有关规定和规范之外,还须对混凝土地防腐性能给予高度关注,在条件许可时采取特殊对应措施,减轻乃至根除腐蚀对公路构筑物的破坏作用。

Analysis of Anticorrosion Technology of Bridge and Culvert Structures Concrete of Qinghai Chage Expressway Project in Saline Soil Area

The northwest region of China is more extensive areas of saline land distribution,which is characterized by particularly severe of saline soil corrosion.The persecution role of the high concentrations intergranular brine or saline soil on pouring concrete highway is very strong.The sulfuric acid,salt and chloride in saline soil area has chemical action with cement,but also can bring damage caused by the physical role.Because the salt crystals is expanded in the wet and dry parts of structure and results in the crack in road concrete,it reduces the service life of the road to a large extent.So,except the relevant rules and norms of road construction in saline soil area,the corrosion resistance of concrete also should be paid great attention to and the special corresponding measures should be taken when conditions permit to mitigate and even eradicate the destructive effects of corrosion on highway structures.