为了获得最佳的水泥和混凝土流变性能,进行了不同SO3含量对水泥和混凝土流变性能影响的工业试验。结果表明,水泥和混凝土的流变性能与水泥中SO3含量具有显著的相关性。对于水泥的净浆初始流动度、胶砂初始坍落度和混凝土初始坍落度存在一个水泥最佳SO3含量。水泥和混凝土的流动性保持能力也与水泥中SO3含量具有显著的相关性,由水泥的胶砂经时坍落度和混凝土经时坍落度得到了与初始流变参数一致的水泥最佳SO3含量。由水泥和混凝土流变性能确定的掺加助磨剂后水泥中适宜的SO3含量为2.7%～2.9%。 In order to obtain the best rheological properties of cement and concrete, the industrial tests of the effect of different SO3 content on the rheological properties of cement and concrete were carried out. The results show that the rheological properties of cement and concrete have a significant correlation with SO3 content in cement. For the initial cement paste flow, the initial slump of the mortar and the initial slump of concrete there is a cement the best SO3 content. Cement and concrete fluidity retention capacity also has a significant correlation with the content of SO3 in cement. The optimum cement content is obtained from the cement sludging slump and the concrete slump over time. content. The appropriate content of SO3 in the cement after adding the grinding aids determined by the rheological properties of cement and concrete is 2.7% -2.9%.