严苛侵蚀作用对优化导电混凝土性能的影响

摘要/Abstract

摘要： 干湿交替和硫酸盐腐蚀引起的损伤严重影响导电混凝土服役时的长期稳定性。本研究以碳纤维、石墨作为导电相材料,掺入粉煤灰和硅灰制备导电混凝土,在干湿交替和硫酸盐腐蚀耦合作用下,讨论粉煤灰、硅灰掺量对导电混凝土力学性能与电学性能的影响。综合导电混凝土的力学性能与电学性能衰变定义了服役性能劣化指标。结果表明:掺入粉煤灰和硅灰后提升了导电混凝土在干湿交替和硫酸盐腐蚀下的耐久性和导电稳定性;当粉煤灰和硅灰的总掺量一定时,提高粉煤灰占比能够有效降低干湿交替和硫酸盐腐蚀造成的强度损失,并提高导电混凝土的导电稳定性。

关键词: 导电混凝土, 干湿交替, 硫酸盐腐蚀, 电阻率, 配合比, 优化设计

Abstract: The damage caused byalternating wetting and drying and sulfate corrosion seriously affects the long-term stability of conductive concrete in service. In this study, carbon fiber and graphite were used as conductive phase materials, and fly ash and silica fume were mixed to prepare conductive concrete. The effects of fly ash and silica fume content on mechanical and electrical properties of conductive concrete underalternating wetting and drying andsulfate corrosion were discussed. The degradation index of service performance was defined by integrating the decay of mechanical and electrical properties of conductive concrete. The results show that the addition of fly ash and silica fume can effectively improve the durability and conductivity stability of conductive concrete under alternating wetting and drying and sulfate corrosion. When the total content of fly ash and silica fume is fixed, the high content of fly ash can effectively reduce the strength loss caused byalternating wetting and drying and sulfate corrosion, and improve the conductive stability of conductive concrete.

Key words: conductive concrete, alternating wetting and drying, sulfate corrosion, electrical resistivity, mix ratio, optimal design

中图分类号:

TU528

王嘉豪, 孔祥东, 陈建康. 严苛侵蚀作用对优化导电混凝土性能的影响[J]. 硅酸盐通报, 2023, 42(2): 463-470.

WANG Jiahao, KONG Xiangdong, CHEN Jiankang. Effect of Severe Erosion on Performance of Optimized Conductive Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(2): 463-470.

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