强化污水对水泥砂浆腐蚀的交流阻抗研究

发布时间：2018-05-04 01:39

本文选题：交流阻抗 + 水泥砂浆　；参考：《混凝土》2017年02期

【摘要】：采用交流阻抗技术对比研究了清水与污水环境下水泥砂浆的微结构变化,及杀菌剂的掺入对混凝土抗污水腐蚀性的影响,此外还进行了质量及孔结构的对比测试。结果表明,Nyquist图的半圆直径(即通过Zview软件拟合得到的阻抗参数R1)可非常敏感地反映材料内部微观结构的变化,该值越大表明水泥石结构越致密。研究中清水浸泡的试件其R1值始终大于污水中试件,且随浸泡时间的增加,两者之间差距显著增大。对于污水中的试件其浸泡90 d内的R1值仍保持增长,说明污水环境下水泥是可以继续水化的,但腐蚀150 d后其值减小。掺入杀菌剂可在一定程度上提高砂浆的抗污水腐蚀性。这与试件的质量损失及孔结构测试结果均一致。
[Abstract]:The microstructural changes of cement mortar under water and sewage environment were compared with the AC impedance technology, and the effect of the addition of Bactericides on the corrosion resistance of the concrete was studied. In addition, the contrast test of the quality and pore structure was also carried out. The results showed that the semicircle diameter of the Nyquist map (the impedance parameter R1 obtained by the Zview software) could be obtained. It is very sensitive to reflect the changes in the microstructure of the material, the greater the value of this value indicates the denser the structure of the cement stone. The R1 value of the samples soaked in the study is always greater than that in the sewage, and the gap between them increases with the increase of soaking time. The R1 value in the 90 d soaked in the sewage is still growing, indicating the sewage. Under the environment, the cement can be hydrated, but the value of the cement is reduced after 150 D corrosion. It can improve the corrosion resistance of the mortar to a certain extent. This is in accordance with the quality loss of the specimen and the test results of the pore structure.

【作者单位】：石家庄铁道大学材料学院;石家庄铁道大学科技处;
【基金】：国家自然科学基金(51478278) 河北省自然科学基金(E2015210083) 河北省高等学校科学技术研究青年拔尖人才项目(BJ2016049)
【分类号】：TQ177.62

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