Now many occupations and many projects require the use of cement pipes , and its quality is more large-scale projects. Generally speaking, the factors that affect the quality and function of cement pipes include cement pipe manufacturing equipment, processing processes, and the selection of raw materials for cement pipes. Regarding the selection of raw materials, we must pay attention to the following key points.
1. Cement pipe making machine cement selection: General portland cement should be used. Because dry hard concrete is used, the mixed water ash is relatively small, and the shrinkage volume of the cement changes little. The amount of cement alone is not high, so it is generally not presented. Shorten cracks. The initial setting time of the cement pipe making machine is relatively short and the initial strength is high. As for the stability and compactness of the concrete, avoiding the collapse of the inner wall, and improving the steam curing, it is advisable to choose general portland cement.
2. Selection of sand for cement pipe making machine: Don't choose too thin or too rough, generally use medium sand, concrete workability is good, impermeability is good, and the concrete strength is low, the pipe is easy to collapse; sand is partial Coarse, poor concrete workability, good impermeability, and high mixed strength, not easy to slump in the pipe making, the selection of sand rate is also important, high sand rate, good workability of concrete, good formability, impermeability Good, and the concrete in the pipe is easy to fall; the sand rate is low, the concrete is poor in workability, the formability is poor, and the impermeability is poor, but the concrete in the pipe is not easy to fall.
3. Selection of stones for cement pipe making machine: Small-diameter suspension rollers are made of pebble or broken pebbles to reduce the resistance of the appearance of the stones and make the concrete simple and compact. Large-diameter suspension rollers should be made of machined crushed stones. It is relatively rough, and the produced concrete is easy to stick together, and it can effectively prevent the concrete from falling. Another choice of pebbles may be through broken stones, which can reduce conflicts with each other.