盐渍土地区输电线路基础混凝土抗硫酸盐腐蚀试验研究

为研究输电线路基础混凝土在硫酸盐腐蚀作用下的劣化规律,以盐渍土地区输电线路不同强度等级混凝土为研究对象,采用硫酸盐干湿循环的试验方法,测试了不同混凝土在标准养护条件和硫酸盐腐蚀条件下混凝土强度变化规律。研究结果表明:标准养护条件下,混凝土强度随龄期增长而提高;硫酸盐腐蚀条件下,混凝土强度随着干湿循环次数增加,表现为先提高后降低的规律,且混凝土强度等级越低,强度出现降低的转折点越早。

Experimental study on sulfate corrosion resistance of concrete of transmission line foundation in salt soil region

In order to study on the deterioration of concrete of transmission line foundation in salt soil region, the method of sulfate wetting and drying cycle was used to test the influence of different concrete between standard curing conditions and sulfate corrosion. The results show that the strength of concrete increases with age under standard curing. Under the condition of sulfate corrosion, the strength of concrete increases and then decreases with the increase of the number of wet and dry cycles. The turning point in intensity of the lower strength concrete reduction occurs earlier.