硅灰是在制造硅金属和硅铁合金的电弧炉中,用木炭还原高纯度石英时所得的副产品。它是一种崭新的火山灰材料,近年来已在世界各国受到人们的极大关注。在斯堪的纳维亚国家,特别是在冰岛、挪威和瑞典,对硅灰在混凝土中的性能进行了研究。在北美洲,关于使用硅灰的某些资料也已有所报道。硅灰中含有大量的二氧化硅,是由很细的球状颗粒所组成。硅灰是从 Silica fume is a by-product of the reduction of high-purity quartz with charcoal in electric arc furnaces that manufacture silicon metal and ferrosilicon alloys. It is a new kind of volcanic ash material, which has received great attention from people around the world in recent years. In Scandinavian countries, especially in Iceland, Norway and Sweden, the performance of silica fume in concrete has been studied. In North America, some information on the use of silica fume has also been reported. Silica fume contains a large amount of silica, which is composed of very fine spherical particles. Silica fume is from