How to mix concrete manually?

The method of artificial mixing concrete:

1, river sand, materials must be prepared before construction, and generally river sand that meets the requirements must be prepared.

2, cement, different brands and different grades of cement performance is not the same, so according to the requirements of the drawings to buy.

3, water, for the project, it is difficult for us to pour water, so we usually put two big buckets on the construction site, which can not only store water, but also store some rainwater even if it rains.

4. Manual mixing. Sometimes if the amount of concrete we use is not very large, we can choose to use manual mixing, which is also fast and convenient. When applying for a certificate, it must be mixed and stirred according to the design requirements and the corresponding mixture ratio, and the mixing should be uniform.