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0引言水泥是混凝土中最主要的组成材料之一,它在很大程度上直接影响到混凝土的质量和工程的经济效益。在混凝土配合比设计中,水泥强度等级值富余系数的选择十分重要。如果取值过高,必然造成水泥用量减少,容易导致混凝土强度达不到设计强度的要求,影响工程的混凝土质量;如果取值过低,也将造成材料浪费,成本增加,而且会出现混凝土28d强度超高的现象,这样的混凝土极易开裂,影响混凝土的长期性能和耐久性能。笔者通过对水泥强度等级值富余
0 Introduction Cement is one of the most important constituent materials in concrete, which directly affects the quality of concrete and the economic benefits of the project. In the mix design of concrete, the choice of coefficient of surplus of cement strength grade value is very important. If the value is too high, will inevitably reduce the amount of cement, easily lead to the concrete strength of less than design strength requirements, affecting the quality of the concrete project; if the value is too low, it will also result in waste of materials, costs increase, and there will be concrete 28d High intensity of the phenomenon, such concrete is very easy to crack, affecting the long-term performance of concrete and durability. The author passed the cement grade value surplus