摘　要：不同来源矿渣因其微观结构的差异导致活性差别很大，利用红外光谱分析方法从矿渣网络聚合度角度进行矿渣水化活性机理的研究与探讨。结果表明：矿渣玻璃体由于表面存在Si-O和Al-O键,不同来源矿渣Si-O和Al-O键明显不同，硅酸根离子的溶出相对来说比较难，因此早期只有少量单硅酸根离子聚合形成水化硅酸钙凝胶。随着水化的不断进行，会有更多的硅和铝暴露在表面，矿渣水化加速，单硅酸根离子聚合的速度也加速，表现在后期矿渣石灰的强度有较大的增长。

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FT-IR analysis of polymerization degree of different origin slag
Huang Xinliang1,Zhou Shenbo2,Liang Xiaoying3,Ren Tingting1,He Fan1(1.Shanxi Building Research Institute, Shanxi,Xian,710082)
Abstract: Different origin of slag has quite different hydration activity due to the discrepancy in micro-sturcture, and by infrared spectroscopic analysis method,the hydration activity mechanism of slag was studied from the angle of polymerization degree. the results show that different origin of slag has quite different Si-O and Al-O chemical bond, therefore only a bit of silicate root polymerize to form gel at early hydration ages. Along with the hydration, there will be more silicon and aluminum exposure to the surface, slag hydration was accelerated, single silicate root ion polymerizing to form silicate speed up. As a result, the strength of the slag lime system increase larger at later hydration ages.
Key words: blast furnace slag; polymerization degree; Si-O bond; Al-O bond; infrared spectroscopic analysis