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測定原理および測定空隙径が大きく異なる水銀圧入法と画像解析法によって評価されるセメントペーストの空隙構造の特徴の対応性を検討した。パーコレーションしきい値と有効空隙率を水銀圧入曲線から決定しKatz-Thompson式の各因子と画像解析法により求めた粗大毛細管空隙率の相関性を明らかにした。粗大毛細管空隙率は有効空隙率と正の相関を有し特に有効空隙率をしきい空隙径から定めると相関性はより明確となった。また粗大毛細管空隙率だけで系のパーコレーションしきい値を上回るようになると伝導経路となる空隙の連続性は大きく変化する。これらは粗大毛細管空隙が連続経路の主枝であり系の伝導性を代表することを示していると考えられる。  Capillary pore structures evaluated by mercury intrusion porosimetry for cement pastes were compared with ones characterized by SEM image analysis. Characteristic values defined in the Katz-Thompson equation were related to coarse capillary porosity of the image analysis. If a sample-spanning path of pores is formed using only the clusters of coarse pores, the formation factor increases with the coarse capillary porosity. Taking account of little changes in the formation factor below a certain coarse porosity, which is almost the same as a threshold value in the percolation theory, the coarse pores detected in the image analysis play the role of the backbone or pivotal paths to determine the entire conductance of cement paste.Ex post facto repor

Comparison of Capillary Pore Structures Evaluated by Mercury Intrusion Porosimetry and Image Analysis for Cement Pastes