摘要
中国西部察尔汗盐湖是个氯盐为主 ,同时含硫酸盐的干涸盐湖 ,对水泥混凝土有严重的侵蚀作用。通过混凝土长期浸泡试验、浸烘循环快速试验等证实 ,其侵蚀性质分不同部位而异 :在卤水中发生石膏型强硫酸盐化学结晶侵蚀 ;在地面以上 30cm以内混凝土内部由于卤水通过毛细管作用上升发生复合侵蚀 ,混凝土表面氯盐结晶产生物理膨胀侵蚀 ,混凝土内部发生石膏型强硫酸盐化学结晶侵蚀。通过浸烘循环快速试验发现 :含 10 %微硅粉外加剂、水泥用量大于 4 0 0kg/m3 的高强度、高致密度混凝土 ,具有很高抗强硫酸盐化学侵蚀和氯盐结晶物理侵蚀的能力。
The Caerhan salt lake located in western of China is a dried-up choride lake.Cement concrete was corroded and destroyed in the salt lake areas.According to the result of long-term soaking tests and soaking stove alternation fast test,there were different corrosion mechanisms in the different area of concrete:in the bittern the concrete 30cm above ground,the chemical etching of sulphate crystal took place;on the concrete surface 30cm above ground mechanical damage caused by crystallization of chloride salt took place.It is found that the concrete containing 10% silica fume additive and with cement content more than 400kg/m 3 has high strength and dense texture,and high resistance to chemical etching of sulphate and mechanical damage of chloride salt crystal.
出处
《硅酸盐通报》
CAS
CSCD
2003年第4期25-28,共4页
Bulletin of the Chinese Ceramic Society
