导电混凝土的导电性能及影响因素研究进展

导电混凝土是具有导电、电热、电磁屏蔽等诸多特性或功能的复合材料,在道路融雪化冰、电气设备接地、结构健康监测以及电磁屏蔽等领域具有广阔的应用前景。导电混凝土应具有适宜的导电性能和电阻率稳定性,但是导电材料类型、形态和掺量以及导电混凝土含水率和环境温湿度等诸多因素都可能导致导电性能和电阻率稳定性降低,从而制约导电混凝土的工程应用。分类对比了常见导电材料的性能差异以及用不同导电材料制备的导电混凝土的导电性能差异,在此基础上,探讨了导电混凝土的导电性能和制备方法的研究现状,较为系统地分析了导电材料类型和掺量等因素对导电性能的影响,并提出了改善导电性能和电阻率稳定性的建议。

Conductive Properties and Influencing Factors of Electrically Conductive Concrete:a Review

Conductive concrete is a composite which has many characteristics or functions, including conductivity, electric heating, electromagnetic shielding, etc. It has a broad application prospect in melting snow on road, connecting electrical equipment, monitoring structure health and shielding electromagnetic. Conductive concrete should have proper electrical conductivity and resisti-vity stability, however the electrical conductivity and resistivity stability would decrease when the concrete are influenced by the type, form and content of the conductive materials, the moisture content of conductive concrete as well as the temperature and humidity of the environment. Thereby, the engineering application of conductive concrete is restricted. On the basis of comparing the differences of common conductive materials and conductive properties of conductive concretes, research status of conductive properties and pre-paration methods of conductive concrete are discussed. Furthermore, this paper proposes a systematic analysis of the effect of conductive material type and content on the electrical conductivity, and suggestions for improving the electrical conductivity and resistivity stability.