文章信息/Info

Title:

Research Progress on Sulfate Resistance of Concrete with Mineral Admixture in Different Environments

作者:

劉芳1; 尤占平 1; 汪海年1; 盛燕萍2

1.長安大學公路學院，西安 710061；2.長安大學材料科學與工程學院，西安 710061

Author(s):

 Liu Fang1 ; You Zhan-ping 1;  Wang Hai-nian1; Sheng Yan-ping2

1.School of Highway, Chang，an University, Xi，an 710061, China
2.School of Materials Science and Engineering, Chang，an University, Xi，an 710061, China

關鍵詞:

礦物摻合料; 硫酸鹽侵蝕; 干濕循環; 連續浸泡; 耐久性

DOI:

10.7502/j.issn.1674-3962.2014.11.06

文獻標志碼:

A

摘要:

硫酸鹽侵蝕是混凝土耐久性研究的熱點之一。礦物摻合料的摻入改變混凝土內部的組成，細化了混凝土的孔結構，對混凝土抗硫酸鹽侵蝕起著舉足輕重的作用。摻合料的化學組成、細度、摻量等對混凝土抗硫酸鹽侵蝕均有很大的影響。外界腐蝕環境的不同，礦物摻合料混凝土抗硫酸鹽侵蝕的效果也有顯著的差別。大量的研究表明，在連續浸泡的硫酸鹽溶液中礦物摻合料只要摻量適當能夠提高混凝土抗硫酸鹽侵蝕的能力。在干濕循環與硫酸鹽溶液共同作用下，礦物摻合料混凝土抗硫酸鹽侵蝕的能力有所爭議。有些研究表明礦物摻合料能夠提高干濕循環條件下混凝土抗硫酸鹽侵蝕的能力；然而有些研究卻持相反的結論，這需要進一步探索。

Abstract:

Sulfate attack is one of the hot topics in the study of concrete durability. The incorporation of mineral admixtures change inside composition of concrete and refine pore structure of concrete, which plays an important role on the concrete resistance to sulfate attack. Admixture of chemical composition, fineness, dosage, etc have great influence on concrete resistance to sulfate attack. When external corrosion environment is different, the effect of resistance to sulfate attack also has significant difference for mineral admixture concrete. Abundant studies manifest that mineral admixtures can significantly improve the ability of resistance to sulfate attack of concrete as long as the content is appropriate in continuous immersion of sulfate solution. In dry-wet circulation and sulfate solution, it is controversial that mineral admixtures of concrete resists to sulfate attack. Some studies have shown that mineral admixtures can improve the ability of resistance to sulfate attack of concrete. some studies, however, hold the opposite conclusion, which need further study.