【摘要】 探讨了以石灰石、矾土和少量助熔剂为原料，用烧结法制造速凝剂的可能性。结果表明，这种速凝剂在水泥中添加８％，即可使初凝时间缩短至１ｍｉｎ以内，终凝５ｍｉｎ以内。且水泥砂浆的２８ｄ强度保留率显著提高，由现用的高碱速凝剂红星Ｉ型的６０．１％提高至８０．１％以上。ＸＲＤ分析表明，本速凝剂主要由Ｃ１２Ａ７和Ｃ１１Ａ７ＣａＦ２等矿物组成。更多还原

【Abstract】 The synthesis of setting accelerator from limestone, bauxite and small amount of mineralizer by low temperature sintering was investigated in laboratory. The results show that, by adding 8% such accelerator , the initial and final setting time of the cement is shotenned within 1 and 5 minutes, respectively. The results of mortar test show that the retention rates of compressive strength of the cement mortar at 28 d increase to above 80.1% from 60.1% for the commonly used type Hongxing-I high alkali accelerator. XRD analysis shows that the synthesized accelerators are mainly composed of C 12 A 7 and C 11 A 7·CaF 2 etc.更多还原