摘要
对淡化海砂混凝土在5%Na2SO4(质量分数,下同)、5%MgSO4+3.5%NaCl两种腐蚀溶液中干湿循环的损伤过程进行研究。结果表明:Na2SO4溶液浸烘循环中,混凝土的损伤表现为动弹性模量先下降后上升最后加速下降;腐蚀溶液中Mg2+与SO24-共同作用下,混凝土的损伤表现为动弹性模量随腐蚀时间先降低,后稳定发展,即将破坏时迅速下降。
The damage process and microstructure of washed sea sand concrete, attacked by solutions of 5% Na2SO4 (by mass, same below) ,5% MgSO4 + 3.5% NaC1 with method of drying-wetting cycle are studied. The resuhs show that the elastic modulus of concrete attacked by Na2 SO4 behaviors in a decreasing stage followed by improved stage finally fell rapidly. For the concrete exposed to solution composed of Mg2+ and SO ,its relative dynamic elastic modulus decreased firstly, then kept stable, finally decreased rapidly to failure.
出处
《四川建筑科学研究》
2013年第4期239-242,共4页
Sichuan Building Science
基金
贵州省交通运输厅科技项目(2010-122-018)
关键词
硫酸盐腐蚀
淡化海砂
干湿交替
动弹模
sulfate corrosion
washed sea sand
drying-wetting cycle
dynamic elastic modulus