论文部分内容阅读
最近一段时间来,许多读者来信询问有关“如何用软练标号的水泥配制混凝土”的问题,现应编辑部要求,对软练标号的水泥在混凝土配合设计中的影响及应注意的事项作一简单介绍。首先要指出的是,在混凝土配合比设计中,当水泥标号的标准由硬练改为软练后,这种标号标准的改变,对混凝土配合比设计的具体步骤,包括用水量和砂率的选用等等都没有影响,而关键性的变化是在混凝土强度与灰水比关系式的经验系数方面。众所周知,混凝土强度主要取决于水泥标号
Recently, many readers wrote a letter asking about how to use “soft-labeled cement to prepare concrete.” Now, at the request of the editorial department, the effect of the soft-labeled cement on the design of concrete cohesion and the matters needing attention should be a brief introdction. The first thing to be pointed out is that in concrete mix ratio design, when the standard of cement labeling is changed from hard to soft practice, the change of the labeling standard and the specific steps for concrete mix design include the water consumption and the sand rate. Choices and so on have no effect, and the key change is in the empirical coefficient of the relationship between concrete strength and gray water ratio. As we all know, concrete strength mainly depends on the cement label