| 作者: 韩宝国,关新春，欧进萍 |
| 单位: 哈尔滨工业大学 土木工程学院, 黑龙江 哈尔滨 150090 |
| 摘要: 结合掺和料的形态分析，研究了碳纤维、石墨、钢纤维以及两种纳米氧化钛复合水泥基材料的力电耦合效应。研究结果表明：钢纤维长径比小，密度大，和粒子状的碳黑一样，在很高掺量仍处于未渗流区，两种水泥石的力电耦合效应都不明显。碳纤维长径比大、密度小，在较小掺量即可进入渗流区，一次加载至破坏，其电阻率变化率可达20%～30%，力电耦合作用最明显。纳米氧化钛在较小掺量即可进入渗流区；金红石相纳米氧化钛水泥石不具备力电耦合效应；而复合具有半导体特性的锐钛相纳米氧化钛的水泥石具有力电耦合效应，一次加载至破坏，其电阻率变化率在7%～10%。 |
| 关键词: 水泥石；力电耦合效应；掺和料 |
| 作者简介: 韩宝国(1976－)，男，黑龙江人，博士生，1997~1999年于哈尔滨工业大学材料学院攻读硕士，并获材料学硕士学位。1999到现在，在哈尔滨工业大学土木工程学院攻读博士学位，师承欧进萍院士，从事智能材料与结构体系研究。 |
| Abstract: Based on analysis of admixtures’ shape, mechano-electric effect of cement pastes admixing with carbon fiber, black lead, steel fiber and two kinds of nano-TiO2 is studied. The results show that, as black carbon with particle shape, steel fiber with high aspect ratio and density does not reach to the vadose zone in higher content, their mechano-electric effect is not obvious. Carbon fiber having the character of high aspect ratio and low density reaches to the vadose zone in lower content. For once-and-for-all compress damage, specific resistance changing is 20%～30%, mechano-electric effect is the most obvious. Nano-TiO2 reaches also to the vadose zone when content is lower. Cement paste admixing with semiconductor nano-TiO2 has mechano-electric effect, specific resistance changing is 7%～10%, however, that with non-semiconductor nano-TiO2 has not mechano-electric effect. |
| Key words: cement paste；mechano-electric effect；admixtures |
| 论文来源: 《第五届中国功能材料及其应用学术会议论文集》 |
几种水泥基复合材料力电耦合效应的比较.pdf
