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以碳纤维为功能导电基元材料制备了碳纤维导电混凝土。探讨了碳纤维导电混凝土的电阻率和 2 8d抗压强度随着碳纤维含量的变化 ;研究了电阻率随交流电压而变化的情况 ,分析了不同电压下的电热效应 ,利用一种趋势计算法近似计算出碳纤维混凝土的热转化效率。试验结果表明 :碳纤维的最佳体积含量为 1.0 % ;随着电压的升高 ,混凝土电阻率减小 ;碳纤维混凝土通电后产生的热量能够满足冬季路面除冰化雪的需要 ;趋势计算法计算出的热转化效率最高可达 99.5 %。
Carbon fiber conductive concrete was prepared by using carbon fiber as conductive material. The electrical resistivity of carbon fiber conductive concrete and the compressive strength at 28 days were investigated with the change of carbon fiber content. The change of resistivity with AC voltage was investigated. The electrothermal effect at different voltages was analyzed. A trend calculation method was used to approximate the calculation Carbon fiber reinforced concrete thermal conversion efficiency. The experimental results show that the optimal volume content of carbon fiber is 1.0%, the resistivity of concrete decreases with the increase of voltage, and the heat generated after the carbon fiber concrete is energized can meet the need of deicing and snowing in winter. The thermal conversion efficiency of up to 99.5%.