安定化剤により安定するダイカルシウムシリケートの相変態と水和反応
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概要
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β-dicalcium silicate was stabilized at room temperature and synthesized from reagent grade chemicals using B_2O_3, K_2O or SO_3 as stabilizers. B_2O_3 acts as the most effective stabilizer for dicalcium silicate. Phase transformation from β-to γ-dicalcium silicate depends on the start temperature of quenching. Hydration heat of β-C_2S shows that SO_3 delayed hydration at an early hydration time, but higher heat liberation rate at a later hydration time than the other stabilizers. ^<29>Si MAS NMR analysis shows that the hydrate of dicalcium silicate stabilized by B_2O_3 is polymerized more than those of dicalcium silicates stabilized by K_2O and SO_3. Dicalcium silicate presents different shapes of calcium silicate hydrate according to stabilizers: dicalcium silicate stabilized by B_2O_3 shows crumbled foil shape and K_2O needle shape of C-S-H.
- 社団法人日本セラミックス協会の論文
- 2001-05-01