コンクリート廃材の炭酸化反応によるカルシウム源のリサイクルと二酸化炭素の固定

概要

論文の詳細を見る
Waste concrete powders were reacted with CO_2 gas in water for the purpose of recovering calcium and the fixation of CO_2 gas in the form of CaCO_3. The 30-h bubbling of CO_2 gas at the flow rate of 5 ml・min^<-1> led to about 40% recovery of calcium, but the recovery or fixation rate of CO_2 gas was only less than 1%. The fourtime repeating of the 4-h bubbling of CO_2 gas nearly doubled both the recovery of calcium and CO_2 gas. Furthermore, the CO_2 recovery rate of 15% was achieved, if the calcium recovery was somewhat reduced. Runs carried out under such various conditions indicated the applicability of the carbonation reaction of waste concrete both to the recovery of calcium and fixation of CO_2 gas.
社団法人日本セラミックス協会の論文
1998-07-01