研究了粒化高炉矿渣(GGBFS)作为粉煤灰基地聚合物外加剂的可行性.GGBFS的掺量为4%,将其抗压强度结果和增进机理与氟硅酸钠作为外加剂的结果进行了对比.测试结果表明,外加剂GGBFS和Na2SiF6的掺入都可以提高粉煤灰基地聚合物的抗压强度,其中4%GGBFS掺入后粉煤灰基地聚合物在30℃下养护14天的抗压强度可以提高19MPa以上,而10%Na2SiF6掺入仅提高10MPa以上.采用X射线衍射分析(XRD)、傅立叶变换红外光谱(FTIR)和压汞测孔技术(MIP)研究了两种外加剂对粉煤灰基地聚合物抗压强度的增进机理.研究结果表明,GG-BFS的掺入可以产生更多的无定形产物,增加胶凝材料的数量,并且能细化其孔隙,减少孔隙率,从而提高粉煤灰基地聚合物的强度.
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