Central Mix Concrete Plants, Twin Shaft or Drum Mixer?

Twin shaft mixers are growing in popularity among owners of central mix concrete plants. Most industry professionals know exactly how a drum type plant mixer works. Modern advances in drum mixers include the addition of pre mixers (sometime called shrink mixers), advanced blade configurations, and even reversing technologies. Twin shaft mixers are a newer technology where the materials in the mixer are thrown into each other by two shafts with paddles that rotate into each other. What technology makes the most sense for a company considering the substantial investment of a central mix concrete plant? Learn more specifications about concrete mixers at http://www.Aimixconcretebatchingplant.com.


There are many considerations when evaluating a drum and a twin shaft concrete mixer. One consideration is availability. Drum mixers are manufactured by several major US based concrete plant manufacturers and are frequently available in the secondary market and may have short or even immediate availability with some new equipment manufacturers. As of the date of this article, most, not all, twin shaft mixers are manufactured oversees and are shipped to the USA. This typically adds 3-5 weeks to the delivery time to allow for shipping time. More US companies are taking an interest in manufacturing twin shaft mixers and one popular foreign manufacturer has recently opened a facility in the US to meet the growing North American demand for the mixing technologies. Shipping and import fees are typically do not significantly impact the costs of twin shaft mixers. Many foreign manufacturers are used to exporting and design equipment to be containerized, where many US manufacturers build for oversized shipments. Typically the costs are negligible between the two mixer types in terms of shipping and import costs.


The most apparent benefits of twin shaft mixers are the ability to add moisture sensors and washout systems. These two benefits alone are worth serious consideration. When you really need to control your mix design, the addition of moisture sensors inside of the mixer that connect back to your control system to accurately dose water during the batch is a huge advantage. The addition of a mixer washout system saves man hours, prolongs equipment life and reduces downtime. High pressure jets do the majority of the washout, and a single man with a hand wand can get any shadow areas minimizing cleanup time and costs. Neither of these options are currently available standard on drum style mixers.

Twin shaft mixers also provide a more vigorous mixing action in comparison to drum style mixers. The industry rumors that the more vigorous mixing action enables less cement content when measuring mix design by strength, however producers with this experience are highly reluctant to discuss mix designs and profits publicly making this claim difficult to prove.

In summary, both mixers have their place in North American construction. Twin shaft mixing is growing in popularity and as the availability of mixers, parts and service become more typical so will the mixers. In the immediate, drum mixers are adequate for most projects and have been the standard in construction for a long time.

Aimix Machinery Company is a professional manufacturer of concrete batching plants, concrete mixers, trucks. More information is available at http://aimixconcretebatchingplant.com/.

Article Source: http://EzineArticles.com/7755546


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