矿渣在无化学激发条件下水化产物的特性
王 强，曹丰泽，米贵东矿渣在无化学激发条件下水化产物的特性
王 强，曹丰泽，米贵东
（清华大学土木工程系，北京100084）
摘要：将磨细矿渣在90℃的纯水环境中养护7d，使浆体硬化，通过水化产物的化学结合水量测定、X射线衍射分析（XRD），扫描电镜观察（SEM）和能谱分析（EDS）等，探究了矿渣在无化学激发的条件下的水化产物特性。结果表明：磨细矿渣在高温条件下水化7d的化学结合水量与水泥在常温下水化1d的化学结合水量接近；磨细矿渣水化生成絮凝状的凝胶产物，其凝胶含有较高的Al和Mg；水化产物的Ca/Si比较低，远低于水泥的水化产物的Ca/Si比。
关键词：矿渣；水化；凝胶；钙硅比
中图分类号：TU521.4；TG115.21+5.3 文献标识码：A doi:10.3969/j.issn.1000-6281.2015.06.002
Properties of the hydration products of GGBS without alkali activation
WANG Qiang, CAO Feng-ze, MI Gui-dong
(Department of Civil Engineering，Tsinghua University，Beijing 100084，China)
Abstract:Grand granulated blast furnace slag (GGBS) paste was prepared by mixing GGBS with water. The GGBS paste hardened after 7 days’ curing at 90℃.The properties of the hydration products of GGBSwithout alkali activation were investigated by X-Ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDS). The results show that the non-evaporable water content of GGBS cured for 7 days at 90℃is very close to that of cement cured at normal temperature. The hydration products have flocculated structure and they are similar to the C-S-H gel produced by cement. The gel produced by GGBS contains much Al and Mg. The Ca/Si ratio of the gel produced by GGBS is much lower than the C-S-H gel produced by cement.
Keywords：GGBS；hydration；gel；Ca/Si ratio
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