水利工程施工时,砼的用量比较大,但怎样能拌制成最优质的砼,许多年来一直是水利工程中的一个普遍问题。正常情况下,砼的强度、抗渗性、抗冻性、收缩性能等与搅拌时砼的用水量有关。从主观愿望上讲,希望少加点水,使砼的性能好一些。但是,施工当中,水加少了不易搅拌均匀。经验表明,满足水泥的水化性作用需要的水仅占水泥用量的20%～ Water conservancy construction, the amount of concrete is relatively large, but how to mix the best quality of concrete, for many years has been a common problem in water conservancy projects. Under normal circumstances, the strength of concrete, impermeability, frost resistance, shrinkage, etc. and concrete mixing water when the amount of water. From the subjective desire, I hope less water, so that the performance of concrete better. However, during construction, the water is less difficult to stir evenly. Experience has shown that the water required to meet the hydration effect of cement accounts for only 20% of the amount of cement used