材料科学与工程学报2025，Vol.43Issue(4)：589-596,8.DOI:10.14136/j.cnki.issn1673-2812.2025.04.010
炭黑与碳纤维协同作用对水泥砂浆裂缝自监测性能的影响
Synergistic Interaction Between Carbon Black and Carbon Fiber on the Self-monitoring Performance of Cement Mortar Cracks
摘要
Abstract
To explore the synergistic effects of different dosages of carbon black(CB)and carbon fiber(CF)on the electrical conductivity and self-monitoring performance of crack damage in cement mortar,the resistivity changes of conductive cement mortar specimens were analyzed using the four-probe method.The relationship between the electrical resistivity change rate(FCR)and the crack length ratio(μ)during crack formation was monitored.The results showed that the incorporation of CB and CF significantly reduced the resistivity and improved the conductivity of the cement mortar.However,with the extension of curing age,the conductivity gradually reduced.As the crack length ratio(μ)increased,the electrical resistivity change rate(FCR)increased,but the rate of increase slowed down,indicating that the impact of crack propagation on resistivity change diminished.Further analysis of the μ-FCR curve and sensitivity(K)value revealed that the self-monitoring performance of cement mortar weakened as cracks propagated.关键词
炭黑/碳纤维/电阻变化率/损伤裂缝自监测/灵敏度/电流密度Key words
Carbon black/Carbon fiber/Fracture change rate/Damage crack self-monitoring/Sensitivity/Current density分类
建筑与水利引用本文复制引用
栾利强,罗嘉俊,肖海鑫..炭黑与碳纤维协同作用对水泥砂浆裂缝自监测性能的影响[J].材料科学与工程学报,2025,43(4):589-596,8.基金项目
国家自然科学基金项目(51369010) （51369010）
广西科技计划资助项目(AD19110085) （AD19110085）
