The Latent Hydraulic Property of Granulated Blast Furnace Slag by Various Activators
Renichi KONDO, Chong Tak SONG, Seishi GOTO, Masaki DAIMON
The latent hydraulic property of granulated blast furnace slag was studied by measuring the rate of heat liberation and the amount of combined water. The experiments were performed using different kinds and amounts of activators. Three activators, lime, gypsum+lime, and sodium hydroxide, promoted remarkably the hydration of slag.
A small amount of lime or portland cement was used in super sulfated slag cement, as an activator together with calcium sulfate. It was found that the only small portion of slag hydrated when the amount of lime was too little, and that the reaction rate became very slow when too much lime existed.
On the basis of these results, it will be interesting to study the above reaction in detail for the purpose of clarifying the kinetics and the mechanisms of the hydration of super sulfated slag cement, which may lead to the wider utilization of granulated blast furnace slag.