How much 425 cement does a cubic concrete need? (with steel bars)

its mixture ratio is not static, but also a dynamic adjustment process. For example, the silt content of the sand you use can affect your cement consumption, and whether the sand gradation is reasonable; Whether the stone you use is river stone or crushed stone, what is the silt content, and whether the gradation is connected gradation or single grain grade; What brand of cement do you use, and the model is 32.5 or 42.5; Whether to stir mechanically or manually; Whether the water used is ordinary drinking water or river water, and what is the water cement ratio ............................................................................................................................................................ Besides, there are many other factors. Therefore, the national requirements for concrete mixture ratio used for engineering must be tested in the laboratory according to the actual materials to be used in the construction site. Various brands of cement have different indexes, such as volume stability and early strength. If there is no test and trial in construction, it will cause great waste of cement or serious quality accidents with unqualified concrete strength. If it is a farmer's self-built house or a repair project with a small amount of work, the method of increasing cement consumption can be adopted. C3 concrete is mixed according to C35-C4, but the consumption is not large anyway. It is also possible to save the concrete matching fee and add it to the concrete, but an experienced master should also be found to guide it. The following is the concrete mix ratio I used: C15 cement 33 sand 619 river stone 1315 water 16 (27.5 cement) C2 cement 33 sand 618 river stone 1315 water 167 (32.5 cement) C25 cement 39 sand 561 river stone 139 water 17 (32.5 cement) C3 cement 43 mice 53 river stone 139. The above data of water 17 (32.5 cement) is only the mixture ratio determined by the construction materials at that time. If the project is used, it is necessary to test the mixture ratio, and adjust the actual mixture ratio according to the water content of sand and gravel in the construction site.