The cement concrete mixer is to mix cement concrete. It has kinds of types. Here are classifications and characteristics:
Classification according to operation, there are cycle operation mixer and continuous operation mixer (such as 100a automatic vacuum mixer).
Cycle operation mixer has certain intervals on formula feed, mixing, and discharging. Because the mixing materials have been accurate weighed, the mixing quality is better. This kind of mixer is used mostly now.
Continuous operation mixer finish the above three steps continuously in a long tube body. Although the cycle operations formula productivity is higher, because of the blending ratio of each material, the mixing time is difficult to control. Therefore the mixing quality is poor.
The most common Industrial Mixing Equipment used today fall into 3 categories: Twin-shaft mixers are known for their high intensity mixing and short mixing times. These mixers are typically used for high strength concrete, RCC and SCC, typically in batches of 2–6 m3 (2.6–7.8 cu yd).
Vertical axis mixers are most commonly used for precast and prestressed concrete. This style of mixer cleans well between batches, and is favoured for coloured concrete, smaller batches (typically 0.75–3 m3 or 0.98–3.9 cu yd), and multiple discharge points. Within this category, the Pan mixers are losing popularity to the more efficient Planetary (or counter-current) mixers as the additional mixing action helps in production of more critical concrete mixes (colour consistency, SCC, etc.).
Drum mixers (reversing drum mixer and tilting drum mixers) are used where large volumes (batch sizes of 3–9 m3 or 3.9–12 cu yd) are being produced. This type of mixer dominates the ready-mixed market as it is capable of high production speeds, ideal for slump concrete, and where overall cost of production is important. Drum mixers have the lowest maintenance and operating cost of the three styles of mixers. All the mixer styles have their own inherent strengths and weaknesses, and all three styles of mixers are used throughout the world to varying degrees of popularity.
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