Analysis of resistivity and conductive mechanism of graphite conductive concrete
The graphite conductive phase material is used to replace the fine aggregate to prepare the functional conductive concrete,and the concrete matrix can be heated by electricity heating to achieve the purpose of snow melting and ice melting.Resistivity is the main index to measure the electrical conductivity of concrete,which is easily affected by factors such as concrete moisture content and ambient temperature.In this paper,graphite,graphite ore and graphite tailings were used as conductive phases to prepare conductive concrete.The mechanical properties of three kinds of graphite conductive phase concrete,the resistivity evolution law and microscopic properties of graphite concrete under different temperatures and water contents were studied,and the conduc-tive mechanism of graphite concrete was analyzed.The results show that the increase of conductive phase con-tent,temperature and water content reduces the resistivity of concrete,and the incorporation of conductive phase reduces the resistivity most significantly.In addition,the results of SEM and EDS tests showed that the content of carbon in the concrete matrix increased significantly under different dosage conditions,which verified that the addition of graphite materials could promote the electrical conductivity of concrete,but it would cause holes and micro-cracks in the concrete matrix,which had an adverse effect on the strength of graphite concrete.
万方数据
维普
