摘要
在宁夏地区大温差和大湿差的自然环境下,研究了早期受5%和10%两种浓度硫酸钠溶液半浸泡的混凝土试样的腐蚀产物。结果表明,半浸泡混凝土试样暴露于空气中的部分发生了严重的无水硫酸钠物理结晶侵蚀;随着硫酸钠溶液浓度的增大,结晶产物并未发生变化,但结晶速度逐渐加快,结晶数量逐渐增多,其主要原因之一是结晶膨胀力所产生的内裂缝加快了硫酸钠溶液毛细上升的速度。
The corrosion products of concrete half immersed in 5% and 10% sodium sulfate solution at early stage under severe natural environment with big temperature and wet difference in Ningxia prefecture were studied. The results show that the concrete exposed to air suffers serious physical crystallization erosion of anhydrous sodium sulfate. With the increase of concentration of sodium sulfate solution, the crystallization product do not change, but the crystallization rate is accelerated and crystallization quantity increase gradually. One of main reason is that the internal cracks generated by crystallization expansion force improve the pace of capillary rise for sodium sulfate solution.
出处
《宁夏工程技术》
CAS
2017年第3期243-247,共5页
Ningxia Engineering Technology
基金
宁夏大学科研启动基金项目(BQD2014017)
区级创新实验项目(201610749078)
关键词
宁夏
大温差
大湿差
硫酸钠
半浸泡
混凝土
腐蚀产物
Ningxia
big temperature difference
big wet difference
sodium sulfate
half immersed
concrete
corrosion products
