Research on Performance and Microstructure of Sewage Pipe Mortar Strengthened with Different Anti-Corrosion Technologies

3rd Annual International Workshop on Materials Science and Engineering

Mu, Song^1,2 ; Zhou, Huaxin^1,2 ; Shi, Liang^1,2 ; Liu, Jianzhong^1,2 ; Cai, Jingshun^1,2 ; Wang, Feng^1

Jiangsu SOBUTE New Materials Co Ltd., Nanjing

211103, China^1

State Key Laboratory of High Performance Civil Engineering Materials, Nanjing

211103, China^2

关键词: Acidic corrosion;    Aluminate cement;    Anti-corrosion;    Comparative research;    Degradation mechanism;    Improvement mechanism;    Inorganic chemistry;    Performance deterioration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/250/1/012036/pdf
DOI  :  10.1088/1757-899X/250/1/012036

来源: IOP

【 摘 要 】

Mostly urban underground sewage is the acidic corrosion environment with a high concentration of aggressive ions and microbe, which resulted in performance deterioration and service-life decrease of sewage concrete pipe. In order to effectively protect durability of the concrete pipe, the present paper briefly analysed the main degradation mechanism of concrete pipe attacked by urban underground sewage, and proposed that using penetrating and strengthening surface sealer based on inorganic chemistry. In addition, using index of compressive strength, weight loss and appearance level to investigate the influence of the sealer on corrosion resistance of mortar samples after different dry-wet cycles. Besides, comparative research on effect of the sealer, aluminate cement and admixture of corrosion resistance was also addressed. At last, the SEM technology was used to reveal the improvement mechanism of different technologies of corrosion resistance. The results indicated that the sealer and aluminate cement can significantly improve corrosion resistance of mortar. Besides, the improvement effect can be described as the descending order: the penetrating and strengthening surface sealer > aluminate cement > admixture of corrosion resistance. The mortar sample treated with the sealer displayed the condensed and sound microstructure which proved that the sealer can improve the corrosion resistance to urban underground sewage.