How Does Horizontal Concrete Pipe Machine Work?
The horizontal concrete pipe machine, also called roller suspension concrete pipe machine. The steel roller is driven by the motor, rotating at high speed along with the mold. Filling the concrete into the steel mold, the concrete spinning at high frequency, spread on the inner surface of the mold. With filling concrete, the thickness of concrete become thicker and thicker and starting compacted by the steel roller. Compacted with roller press and centrifugal force, the concrete forms the pipe shape and gains smooth surface.
The specification of horizontal concrete pipe machine is significant to the finished concrete pipes, the machine should be designed according to the pipe standard, accessories machinery, steel mold. One horizontal concrete pipe machine makes 3 or 4 specifications of pipes, according to the production experience, specifications of horizontal concrete pipe machines see below:
How do we work out this? Its according to the roller and diameter. Roller: diameter=1:4~1:5, the smaller the roller diameter ratio, the smaller contact surface between roller and concrete, the bigger of the pressure; the bigger the roller diameter ratio, the smaller pressure between roller and concrete. However, if the roller & diameter ratio is too small, the concrete would difficult to form the pipe shape, and the defect may happen.
|Rotation During Filling|
|Concrete Filling Period|
Concrete specification for horizontal concrete pipe machine
- Cement. High-early-strength portland cement is the priority to concrete pipes, the initial setting time should less than 100 min. In order to improve the production efficiency, rapid hardening sulphate cement is better than others in the winter season.
- Sand. River sand which fineness modulus between 2.2-2.3 is good for concrete pipes, the silt content should within 2%.
- Stone. Stone for horizontal concrete pipe machine should not too big, if the diameter of stone is too big, the cement and sand is not easy to full fill the space between stones, and the concrete pipe is hard to be compacted to high density and strength. The diameter of pipes should not too small too. Its good to the surface and the permeability resistance using small stone, but this will reduce the strength of the pipes. The best way is to choose the appropriate aggregate proportion, to improve the density and strength and gain the smooth surface at the same time. For large diameter pipes, the diameter of stone among 5-25mm; medium diameter of pipes use stone among 5-20mm, for small diameter of pipes, the diameter of stone should among 5-15mm.
- Mineral admixture. Mineral admixture like coal ash, slag power matters a lot to improve the workability of concrete, and improve the durability and permeability resistance.
- The concrete ratio for horizontal concrete pipe machine see specifications below.
|Stone (Max Diameter)|
Curing of horizontal concrete pipe machine
The concrete pipes made by horizontal concrete pipe machine cure with the mold together. The inner mold is circular and less water in the half-dry concrete, so the period of warm-up and cooling down will be shorter.
|portland slag cement||40||40-95||95±5||to normal|