作者：WANG Hanyu1LI Haixu1ZHAN Huasheng1LIU Xiaoguang2ZHENG Hua1,3WANG Fengyu1,3SUN Huochang1ZHAO Yan1YANG Hao1FENG Zikuo1ZHAO Shaowei4
作者單位：1.Beijing Jinyu Tongda Refractory Technology Co., Ltd.2.School of Materials Science and Engineering, University of Science and Technology Beijing3.Wuhan University of Science and Technology4.Beijing Building Materials Academy of Sciences Research
刊名：China's Refractories
ISSN：1004-4493
出版年：2024-12-15
卷：33
期：4
起頁：34-37
止頁：
分類號：TQ175.732
語種：中文
關鍵詞：
內容簡介Two kinds of pure calcium aluminate cement（CAC） prepared by the sintering method and the electric melting method, respectively were analyzed in terms of the particle size, XRD patterns and hydration characteristics; and their effects on the hydration heat and construction performance of the cement-based castables were discussed. It is found that（1） the electric fused CAC contains 50.67% CA and 44.89% CA2, while the sintered CAC contains 74.57% CA and 22.97% CA2; in addition, compared to the sintered CAC, the electric fused CAC contains more C3A, C12A7, and a small amount of amorphous phase;（2） the electric fused CAC(d50 of 7.93 μm) has much smaller particle size than the sintered CAC(d50 of 12.51 μm);（3） in the early stage of hydration, the exothermic peak of the electric fused CAC appears earlier and the heat flow rate is higher than that of the sintered CAC; the dormant period of the sintered CAC is relatively short and the main exothermic peak appears earlier than that of the electric fused CAC;（4） for cement-based castables, there is no obvious exothermic peak in the early hydration stage, but the temperature of the castables slightly increases; among them, the initial hydration temperature of the electric fused CAC-based castable is higher; and the main exothermic peak of the sintered CAC-based castable appears later than that of the electric fused CAC-based castable;（5） the exothermic heating on-site occurrs earlier, which is related to the higher environmental temperature（about 30 °C）; the on-site electric fused CAC-based castable begins to show more cracks during the exothermic peak stage.
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