β-ダイカルシウムシリケートの水和反応と水和物に及ぼすアルカリの影響

概要

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β-dicalcium silicate was synthesized and hydrated with/without alkalies at different temperatures. Alkalies accelerated the hydration of β-C_2S and influenced the polymerization of calcium silicate hydrate. KOH and NaHCO_3 caused excessive and early liberation heat of the β-C_2S. The effect of NaHCO_3 was more significant than that of KOH on the acceleration of hydration. The curing temperature was also an important factor in the acceleration of the hydration of β-C_2S ; the hydration was occurred much more actively at 40°C than at 20°C. The controlled β-C_2S showed a much greater degree of polymerization of calcium silicate hydrate than did the alkali-added β-C_2S. The hydrates of β-C_2S were influenced by alkalies and temperature. The controlled β-C_2S showed needle-like and wide needle-like shapes of calium silicate hydrates, while the alkalie-added β-C_2S presented long and wide needle-like shapes and crumbled foil-like shapes of calcium silicate hydrates. The calcium silicate hydrates formed at high temperature exhibited also crumbled foil-like shapes.
社団法人日本セラミックス協会の論文
2000-02-01