将超细羰基铁粉按一定比例与经粉磨处理的粘土粉等原材料混合,压制成型后经煅烧、破碎制备得到了导电功能集料;采用XRD、SEM等测试手段研究了导电功能集料的矿物相及微观结构,同时对其导电性能、气孔率和吸水率,以及其对碳纤维混凝土导电性能所起的作用等进行了研究.结果表明,超细羰基铁粉可作为导电相存在于陶质基体之中,电子通过隧道跃迁效应而在铁粉微粒间形成电流,6.5%的体积掺量是形成导电通路的逾渗阈值;超细羰基铁粉在煅烧过程中通过影响液相的形成而影响集料的气孔率和吸水率等;在同样碳纤维掺量下,导电功能集料与普通不导电集料相比可显著降低混凝土的体积电阻率.
参考文献
[1] | Z.Q.Shi;D.D.L.Chung .Carbon fiber-reinforced concrete for traffic monitoring and weighing in motion[J].Cement and Concrete Research,1999(3):435-439. |
[2] | Sun M;Li Z;Mao Q et al.Study on the hole conduction phenomenon in carbon fiber-reinforced concrete[J].Cement and Concrete Research,1998,28(04):549-554. |
[3] | Sun M;Li Z;Mao Q et al.Thermoelectric percolation phenomena in carbon fiber-reinforced concrete[J].Cement and Concrete Research,1998,28(12):1707-1712. |
[4] | Mingqing Sun;Qingping Liu .A study of piezoelectric properties of carbon fiber reinforced concrete and plain cement paste during dynamic loading[J].Cement and Concrete Research,2000(10):1593-1595. |
[5] | Sihai Wen;D. D. L. Chung .Electromagnetic interference shielding reaching 70 dB in steel fiber cement[J].Cement and Concrete Research,2004(2):329-332. |
[6] | Sherif Yehia;Christopher;Y. Tuan .Conductive Concrete Overlay for Bridge Deck Deicing: Mixture Proportioning, Optimization, and Properties[J].ACI materials journal,2000(2):172-181. |
[7] | Tarun R. Naik;Rudolph N. Kraus;Bruce W. Ramme;Yoon-Moon Chun;Rakesh Kumar .High-Carbon Fly Ash in Manufacturing Conductive CLSM and Concrete[J].Journal of Materials in Civil Engineering,2006(6):743-746. |
[8] | Lu Linnu;Ao Zhaoxin;He Yongjia.Experimental study on conductive asphalt concrete using steel slag as aggregate[A].江苏南京,2008:1043-1050. |
[9] | 何永佳,吕林女,金舜,胡曙光.导电功能集料碳纤维水泥基复合材料及其压敏性能[J].功能材料,2011(11):1958-1961. |
[10] | 侯宁普,杜梅芳,李洁,吴高贺,乌晓江.用量子化学理论研究煤灰中矿物质铁橄榄石的物理和化学性质[J].材料导报,2010(18):76-79. |
[11] | 舒启清.电子隧穿原理[M].北京:科学出版社,1998 |
[12] | Voet A .Temperature effect of electrical resistivity of carbon black filled polymers[J].Rubber Chemistry and Technology,1981,54(01):42-50. |
[13] | Simmons J G .Generalized formula for the electric tunnel effect between similar electrodes separated by a thin insulating film[J].Applied Physics,1963,34(06):1793-1803. |
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