EXPERIMENTAL RESEARCH ON EFFECTS OF CRACK WIDTH ON THE CONDUCTIVE PROPERTY OF CFCC FOR AIRPORT PAVEMENT DEICING

The carbon fiber conductive concrete ( CFCC) is a new material with extensive application prospect in the airport pavement deicing． Whereas，cracks in CFCC have a serious influence on the properties of its conductivity． The concrete proportioning design of CFCC in this paper is based on the requirement of airport pavement． Through experimental study，the appropriate dosage of carbon fiber was determined and the relationship between the crack width and the conductive property of CFCC was made． The research showed that the CFCC resistance change rate with the increase of crack width was a linear relation at first，and then rose significantly after a critical crack width，which was defined as the effective conducting critical width of CFCC． According to the test，whose value was about 0. 65 mm especially for airport deicing CFCC．