摘要
通过将混凝土试件长期浸泡于10%的硫酸盐溶液中,同时施加竖向压力,并将压应力水平长期保持为0,0.2,0.3,0.4,0.6。结果表明压应力的存在对硫酸盐腐蚀起抑制作用,且随着压应力比的不同,抑制水平也不同。压应力比为0.3时抑制作用最强;当压应力比小于0.3时,随着压应力比的增大抑制效果逐渐增强;大于0.3时,抑制效果逐渐减弱。通过机理分析,在压应力作用下混凝土内部孔隙和微裂缝受到压缩或消除,使得混凝土密实度提高,从而抑制混凝土硫酸盐腐蚀的速率。
The concrete blocks immerse in 10% of the the sulfate solution, meanwhile apply vertical pressure and keep the stress levels of 0,0.2,0.3,0.4,0.6 long time. The results showed that： the presence of compressive stress can inhibit the sulfate corrosion,while the different of compressive stress raito has different inhibitory effect.When the compressive stress is 0.323, its inhibitory effect is the best. When the stress ratio is less than 0.323, the greater compressive stress raito is, the batter its inhibitory effect.While when the compressive stress raito is more than 0.323, the inhibitory effect gradually weaken. By Mechanism, under compressive stress the pores and microcracks in the concrete will be impressed or eliminated, that will lead increase the density of concrete, thereby inhibit the rate of sulfate corrosion of concrete.
出处
《建筑技术》
北大核心
2017年第1期85-88,共4页
Architecture Technology
关键词
混凝土
硫酸盐腐蚀
压应力水平
腐蚀层厚度
concrete
sulfate corrosion
compressive stress ratio
corrosion thickness
