| 摘要 |
The invention offers an improved forming method for high strength concrete conduits applying internal vibration providing excellent material properties, uniform thickness, and a smooth surface without splashing of the water and concrete, sludging of concrete, and environmental pollution. The method comprises simultaneous processes of centrifugal rotation and vibrational molding. The body and socket(S) of the form mold(11) are centrifugally revolved and an exterior vibration applied while water and concrete is poured in. The invention makes it possible to do the process sequentially by automatic production line to get concrete tubes with uniform thickness, and a smooth surface without splashing of the water and concrete, sludging of concrete, and environmental pollution.
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