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I want to find a suitable AC or DC gear motor for concrete paste mixing. The application details are given below

Material type - concrete paste RPM - 30-200rpm Qty of material - 30Liters Mixing style - Planetary To understand the type of mixer, you may consider bakery mixer.

Can somebody help me how to calculate the capacity of gear motor that I have to select for this application?

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closed as too broad by Fred, Wasabi, Solar Mike, hazzey, Andrew Mar 18 '18 at 12:20

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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Concrete mixers usually have 3-4 blades attached to the walls of the mixer and rotating with the mixer tilted 60-70 degrees. Let's assume the diameter of the mixer 0.5 meters

Assuming the blades lifting up carry half of the weight of the mix, $$w=30/2 (2.5)\space with 2.5 = density\space of\space mix. $$ w = 37.5 kg. And the work mixer has to do at 100rpm is

$$W = (37.5)9.8.100( 0.5)/60seconds/mins= 306.25 watts$$ This is a very rough approximation. One would need to consider the clumping of the concrete, potentially clutching of the mixer, etc. So for a 200rpm mixer, you'd need a 612-watt motor, say one horsepower.

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  • $\begingroup$ Thank you. the concrete mixer I referred here is not tilted one. it is a platform mount mixer. any way tilt angle is not used in your formula. I have to consider a height of the material. in this case, will it be a some other formula considering shear stress and viscosity of the material? $\endgroup$ – Aayvu.com Mar 17 '18 at 9:21
  • $\begingroup$ Why not take what has been offered and adapt it now to match your own assumptions or that which was not clearly stated in your question... $\endgroup$ – Solar Mike Mar 17 '18 at 16:35

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