The common concrete mix proportion is as follows:

1、C20：水：175kg，水泥：343kg，砂：621kg，石子：1261kg。配合比：0.51:1:1.81:3.68。

1. C20: water: 175KG, cement: 343kg, sand: 621kg, gravel: 1261kg. Mix proportion: 0.51:1:1.81:3.68.

2、C25：水：175kg，水泥：398kg，砂：566kg，石子：1261kg。配合比：0.44:1:1.42:3.17。

2. C25: water: 175KG, cement: 398kg, sand: 566kg, gravel: 1261kg. Mix proportion: 0.44:1:1.42:3.17.

3、C30：水：175kg，水泥：461kg，砂：512kg，石子：1252kg。配合比：0.38:1:1.11:2.72。

3. C30: water: 175KG, cement: 461kg, sand: 512kg, gravel: 1252kg. Mix proportion: 0.38:1:1.11:2.72.

从以上混凝土的配比来看，混凝土标号越高，1立方混凝土中水泥的用量就越大。

From the above concrete ratio, the higher the concrete grade, the greater the amount of cement in 1 cubic meter concrete.

小型水泥自动搅拌车常用于农村修路，水渠，房屋修建，隧道地下室施工等受力不大的工程，所以对于一些没有搅拌站的一些小型工程场地，可以采用可以自拌干料的小型搅拌车，下边详细的讲解一下小型水泥自动搅拌车在自拌干料时的上料顺序及方法。

Small concrete mixer is often used in rural road construction, water channel, housing construction, tunnel basement construction and other projects with little force. Therefore, for some small engineering sites without mixing station, small mixing truck can be used to mix dry materials. The following details the loading sequence and method of small concrete mixer when mixing dry materials.

众所周知，1立方常用混凝土重2.4吨，按照配比顺序，

As we all know, one cubic meter of commonly used concrete weighs 2.4 tons,

① 先加水 方法如下，找一个有体积表示的油桶或者水桶，按照水泵正常流速泵水，用手机秒表记录打满水的用时并计算水泵流速，就可以算出泵175kg水所需要的时间，卡时间向罐体里注水。

① The method of adding water first is as follows: find an oil or water bucket with volume representation, pump water according to the normal flow rate of the water pump, record the time of filling water with mobile phone stopwatch and calculate the flow rate of water pump, then the time required to pump 175KG of water can be calculated, and the card time can be used to inject water into the tank.

②加水泥 我国常见的水泥为50kg/袋，用铲车直接加7袋共350kg。

② The most common cement in China is 50kg / bag, which is 350kg by forklift truck.

③加砂  用袋子为计量，倒入铲车铲斗上料，直接加620kg。

③ The sand is measured by bags, and then it is poured into the bucket of forklift truck for loading, and 620kg is added directly.

④加石子  用③的方法加入约1255kg。

④ Add about 1255kg stone by the method of ③.

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