Ca [Zn (OH) <SUB>3</SUB>H<SUB>2</SUB>O] <SUB>2</SUB> Synthesis and its Effect on Portland Cement Setting
スポンサーリンク
概要
- 論文の詳細を見る
This paper deals with the Ca [Zn (OH) <SUB>3</SUB> H<SUB>2</SUB>O] <SUB>2</SUB> synthesis from the system CaO-ZnO-H<SUB>2</SUB>0 or the system Ca (NO<SUB>3</SUB>) <SUB>2</SUB>-CaCl<SUB>2</SUB>-NaOH-H<SUB>2</SUB>O, indicating that Ca [Zn (OH) <SUB>3</SUB>H<SUB>2</SUB>O] <SUB>2</SUB> is suited for portland cement setting time retarder.<BR>The results obtained are as follows.<BR>(1) If Ca [Zn (OH) <SUB>3</SUB>H<SUB>2</SUB>O] <SUB>2</SUB> synthesis from the system CaO-ZnO-H<SUB>2</SUB>O is tried, the Ca [Zn (OH) <SUB>3</SUB>H<SUB>2</SUB>O] <SUB>2</SUB> formation velocity is more accelerated, when the reaction temperature is lower and, at above 60°C, it is not formed.<BR>(2) The Ca [Zn (OH) <SUB>3</SUB>H<SUB>2</SUB>O] <SUB>2</SUB> formation time is accelerated by adding NH<SUB>4</SUB>OH into the system CaO-ZnO-H<SUB>2</SUB>O.<BR>(3) Ca [Zn (OH) <SUB>3</SUB>H<SUB>2</SUB>O] <SUB>2</SUB> is an aqo coordination compound, Zn coordination number is 4, while that for Ca is 6.<BR>(4) ca [zn (OH)<SUB>3</SUB> H<SUB>2</SUB>O] <SUB>2</SUB> dehydration is accomplished in the following three steps (125°C, 157°C and 380°C).<BR>(5) Ca [Zn (OH)S<SUB>3</SUB> H<SUB>2</SUB>O] <SUB>2</SUB> addition to portland cement retards the setting time for 1-2 hours, but increases the compressive strength over a long period.
- 無機マテリアル学会の論文
無機マテリアル学会 | 論文
- 建築の凹凸仕上げ模様の計測方法
- 半水セッコウの凝結時間および硬化体の強さに及ぼす二水セッコウ添加の影響
- セッコウ硬化体の強さに及ぼす半水セッコウスラリーへの超音波照射の影響
- アルミニウム置換型トバモライトの層間を利用した赤色発光する蛍光体の合成と蛍光特性
- 超音波照射を用いて合成した炭酸カルシウムの特徴