The mix ratio of C25 concrete is 1:1.76:3.33:0.55. per cubic meter of concrete cement dosage is 411Kg, sand is 0.45 cubic meter, stone is 0.8 cubic meter and water is 0.18 cubic meter.

Note: The above is the theoretical ratio of the laboratory, the construction ratio should also be adjusted according to the site of the sand, stone moisture content. And the concrete mix ratio of each place due to the difference of local raw materials, the amount of material is not the same.

C25 concrete construction precautions

1, in the construction of concrete, according to the relevant proportion of mixing and stirring evenly.

2, after the concrete is mixed well, it must be used within five hours, if I exceeded five hours, and then use the concrete, the concrete will undergo a series of chemical reactions, the phenomenon of cracks is likely to occur later, in addition to the concrete in the pouring time between the two times can not be more than an hour and a half difference in the construction of the construction of the time must be a continuous angle.

3, the process of concrete construction, must continue to use the positive guide stick for stirring, until the concrete surface without bubbles can stop.