The Influence of Additives on the Expansive Stress of Quick Lime

概要

論文の詳細を見る
In previous report, authors mentioned that blown out shot occured using only quick lime, and approximately 100kg f/cm2 of expansive stress was obtained when adding retarding agent to hard burned quick lime. In this report, the influence of additives such as cement minerals and super plasticizer on the expansive stress of quick lime was examined. The results are as follows. 1) When adding anhydrite to quick lime, the hydration is slightly delayed and 100kg f/cm2 of expansive stress is obtained. 2) When adding calcium aluminate to quick lime, the hydration is not delayed at all and it is impossible to charge it into the pipe. 3) Alite possesses large delaying effect on CaO hydration among additives, and expansive stress of quick lime added it reaches 160kg f/cm2. The reason of this is assumed that the expansion of CaO works effectively on side wall as expansive stress because of self-hardening property of alite. 4) When adding super plasticizer to CaO-Alite, expansive stress increases enormously to more than 300kg f/cm2.
無機マテリアル学会の論文