Conductive　parameters　(electrical　resistivity　and　electrochemical　impedance　spectroscopy)　and　profound　mechanism　of　fresh　cement　slurry　with　water　to　cement　(w/c)　ratios　of　0.35,　0.4,　and　0.45　and　samples　whose　w/c　ratio　is　0.4　containing　90%　cement　and　10%　silica　fume　(or　10%　blast　furnace　slag)　are　studied　in　this　paper.　Furthermore,　fresh　cement　slurry　with　various　dosages　of　superplasticizer　is　prepared　to　explore　different　rheological　properties　of　the　fresh　paste.　Results　indicate　that　the　evaluation　function　for　electrical　resistance　and　slump　flow　or　apparent　viscosity　fits　well　with　one　dimensional　Gauss　function　equation.　Silica　fume　can　improve　the　conductivity　of　fresh　cement　slurry,　while　blast　furnace　slag　shows　a　contrary　effect.　The　conductivity　of　fresh　cement　slurry　can　be　simplified　as　an　equivalent　circuit　which　consists　of　the　contact　resistance　between　embedded　electrodes　and　fresh　cement　slurry　and　three　following　series-connected　electrical　components　(three　resistor　elements　and　three　capacitance　elements).　Both　the　rheological　and　electrical　properties　of　fresh　cement　slurry　are　closely　related　to　the　content　of　free　water　which　highlights　the　possibility　of　monitoring　the　rheological　parameters　of　fresh　cement　slurry　through　electrical　testing　ways.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.