After the studies, it was found that the concrete properties used in the machine consist of the volume of cement, the ratio of water and cement, the percentage of sand, the volume of sand and stone. First, let's briefly learn about the volume of cement. The volume of cement creates the adhesive force of the filler. Volume improved machinability, within certain limits, increases the strength of concrete, used for concrete pipes machine due to liquefaction and facilitate the flow. Excessive use of cement leads to an increase in cost. The decrease in volume is observed due to other chemicals used in concrete. The standard amount of cement C30 320-370 kg /m, the standard amount of cement C40340-380 кгм3, the standard amount of cement C50 360 – 400 kg / m3.
The ratio of water to cement indicates the composition of the concrete used by the machine. The ratio of water and cement is very important. This condition is very important for the preparation of concrete. Concrete pipe machine is a great machine with vibration technology. High density due to vibration. Concrete also should not be lumpy and should be semi-dry. If there are lumps, they should be compressed manually. The ratio of water and cement is 0.36-0.39 Dec.
Finally, consider the volume of sand and stone in relation to the percentage of sand. Just want to note that the percentage of sand is the main factor that increases the adhesion and machinability of concrete. The coefficient of this factor is from 0.40 to 0.48 Dec. The volume of sand and stone is the main factor that ensures the machinability of semi-dry concrete. The General classification should be kept under control at the production stage. This is an important point. General classification also reduces cement consumption. For quality production, it is necessary to adjust the overall quality, seasonal and climatic changes, the size and proportions of concrete pipes and the degree of aggregate.
