[1054] シリカ粉末添加が低温ポルトランドセメントペーストの早期水和に及ぼす影響
キーワード：Low heat Portland cement、 hydration degree、 pore structure、 C-S-H
In this study, X-ray diffraction analysis and proton nuclear magnetic resonance relaxometry are employed to investigate the hydration process of low heat Portland (L5) cement incorporating silica powder (SP) at an early age. The L5-SP paste had a water-to-binder ratio(w/b) of 0.42. The replacement of SP for L5 cement was 0, 18.75, 26, and 41% (by weight of the binder). From the experimental results, SP accelerated the hydration of the cement paste. SP also changed the pore structure of the paste and the composition of the hydration products.