混凝土是由水泥、细骨料、粗骨料及水经适当配合搅拌而成,根据施工需要有着各种不同的配比。用普通混凝土进行泵送,它的质量在泵送前后几乎没有变化,但在混凝土中使用了轻质骨料或减水剂,就会使混凝土质量发生变化,对此进行正确的分析,改善混凝土的质量是十分必要的。一、普通混凝土的配比及质量 Concrete is made of cement, fine aggregate, coarse aggregate and water with appropriate mixing and mixing, according to the needs of the construction has a variety of different ratio. Pumped with normal concrete, its quality almost unchanged before and after pumping, but the use of lightweight aggregate or water-reducing agent in concrete will make the concrete quality change, to do the correct analysis to improve the concrete The quality is very necessary. First, the ratio of ordinary concrete and quality