摘要
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 %。
The carbon fiber conductive concrete is prepared in CF elementary material of function. The changes of the resistivity and 28 days compressive strength with carbon fiber contents and the resistivity variation with the voltage of AC power are analyzed. The electro-thermal efficiency is analyzed under the different voltages and accounted approximately by a trend numeration. The experimental results show that the critical content in volume of CF is 1.0%. The resistivity decreases with the increasing of voltage. The thermal energy produced in CFRC connected to AC power source is enough for deicing and snow melting purpose. Thermal transformation efficiency of CFRC is up to 99.5% by the trend numeration.
出处
《公路》
北大核心
2004年第12期178-182,共5页
Highway
基金
国家高技术研究发展计划 ( 863计划 )
课题编号 2 0 0 1AA3 2 2 0 70
