1995 年 6 巻 2 号 p. 39-46
The effective utilization of converter slag has not been found as yet. It is a serious environment problem for steel industry. The purpose of this study is to use dephosphorized converter slag as a construction cementation material, which is improved by a calcination and decreased in free CaO of dephosphorized slag, and it was clarified the properties of mortar of cement mixed with improved dephosphorized slag. Though strength of mortar replaced the cement by 10-30 wt% of improved dephosphorized slag was low at shorter ages, but it was expected to increases the strength at later ages. The adiabatic temperature rise was showed lower than OPC mortar. These properties was contributed by the existence β-C2S in dephosphorized slag, a product of C-S-H gel was confirmed in the hydrates. Change in length by dial gauge showed little expansion. The improved dephosphorized slag is a promising cementation material for concrete.