硅酸盐学报

利用ＸＲＤ，ＤＴＡ等分析方法研究了不同类型钢渣在水热条件下的蒸压胶凝性和水化产物．结果表明：钢渣的胶凝性在水热条件下可以得到激发；低碱度钢渣以Ｃ３ＭＳ２－Ｃ２Ｓ的水化为主，其产物为Ｃ２ＳＨ（Ｃ）、水石榴石，高碱度钢渣以Ｃ２Ｓ－Ｃ３Ｓ的水化为主，其产物为Ｃ２ＳＨ（Ａ）、Ｃａ（ＯＨ）２、Ｃ２ＳＨ（Ｃ）、水石榴石；在本实验条件下钢渣中橄榄石类是稳定的；钢渣中掺入石英砂可大幅度提高蒸压制品的强度；钢渣－砂体系的水热反应产物以硬硅钙石为主，并伴随有少量的ＣＳＨ（Ｂ）；石灰对钢渣制品强度的提高没有多大的贡献，钢渣－石灰体系的水热反应产物主要为Ｃ２ＳＨ（Ｃ）和Ｃ３ＳＨ

In this paper, cementitious behaviour and hydrothermal reaction of steel-slag under different conditions are studied. The research results reveal that under the hydrothermal conditions, cementitious behaviour of steel-slag can be activated. Hydration of low alkalinity steel-slag depends on C3MS2-C2S, the hydration products were C2SH(C), hibschite: high alkalinity steel-slag hydration depends on C2S-C3S, its hydration products are C2SH(A),C2SH(C),Ca(OH)2 and hibschite. Under the given experimental conditions, kirschsteinite is stablized. Siliceous materials added may be decrease the nC/nS of steel-slag and incerease the compressive strength of the autoclave product. Hydration product of steel-slag and sand is mainly xonotlite, accompanied with small amount of CSH(B). Lime mixed with steel-slag can not affect the compressive strength obviously. The hydration products of the mixture are C2SH(C),C3SH2.