もみがら灰と水酸化カルシウムの水和反応メカニズムと水和物を研究した.その結果, もみがら灰は水酸化カルシウム溶液と速く反応することが確認された.飽和水酸化カルシウム溶液のpH値と電気伝導率は, 時間の経過とともに下降し, ADRサンプルでは下降速度がとくに速かった.水和反応初期においてもみがら灰は水酸化カルシウムとの反応速度が速くなった, 水和反応メカニズムは, 拡散制御に属し, Jander拡散方程式とGenstleng拡散方程式で表される.Jander反応速度定数とGenstleng反応速度定数は, ADRサンプルではそれぞれ18.41×10^-4と14.46×10^-4となり, RHAサンプルでは10.99×10^-4と9.180×10^-4となる.DTAとXRDの結果から, C-S-H (Ca_1.5SiO_3.5・xH₂O) が唯一の水和反応物である.

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Activated carbons with high specific surface area were prepared from phenolic resin by alkali activation with sodium hydroxide. This paper discussed the influence of the preparation conditions, such as activation temperature, alkali ratio and precursor particle size. Furthermore, adsorption ability of iodine was examined on the prepared activated carbon.
The specific surface area increased with an increase in activation temperature up to 1073 K (2780 m²·g^-1) and decreased at 1173 K because of excess activation. The activated carbon, which was prepared at the activation temperature of 1073 K and the alkali ratio of over than 5.0, had very high specific surface area of more than 2000 m²·g^-1. It was confirmed that sodium hydroxide worked effectively as the activating reagent in two temperature ranges, below 773 K and above 873 K. The amount of iodine on the prepared activated carbon was much larger than that on the commercial activated carbon.

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