【摘要】 本文以氟硅酸盐、铝硅酸盐和过渡元素为主要成分 ,开发出新型超缓凝剂 ,缓凝时间超过 42h。 2 8d强度与基准混凝土基本相同。采用绝热温升法测定了这种超缓凝剂对大体积混凝土水化热过程影响 ,并通过SEM等研究其硬化体显微结构 ,进而探讨了超缓凝机理。工程实际应用表明该超缓凝剂有广阔应用前景 ,如避免冷接缝、减少大体积混凝土温度裂缝、控制坍落损失和开发混凝土施工新工艺以及避免夜间施工等。更多还原

【Abstract】 ? The paper studies the new kinds of super setting retarder that composites with fluosilicate,aluminosilicate、transition element compeund.The setting time over 42 hours and it’s proposed that the compressive strength is greatly improved and strengthened.The mircrostructure of the hardening cement admixed with supper setting retarder is described by SEM,and the super setting principles in also discussed.The paper also show the vast vistas of super setting retardes’s application on the practical concrete project. 〔更多还原