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Concrete Mixers
Concrete mixers (cement mixers) are machines that homogeneously combine cement, aggregates (sand/gravel), and water to form concrete
They typically use a rotating drum or blades to mix materials. Small portable mixers are used on-site for minor construction, while large stationary or mobile mixers handle high volumes.
Type
Drum Mixers: Common in construction. These use a revolving drum with internal blades. Subtypes include tilting drum (the drum tilts to discharge mixed concrete) and reversing drum (drum rotates in reverse to discharge)
Pan/Planetary Mixers: Stationary mixers with a horizontal pan and rotating paddles or planetary arms, used for high-quality or small batches (e.g. precast concrete)
Twin-Shaft Mixers: Heavy-duty mixers for large volume and high-strength concrete (e.g. ready-mix plants); they mix intensively and quickly
Continuous Mixers: Constantly feed and discharge material (used for asphalt, mortar, or continuous production)
Transit Mixers (Concrete Trucks): Mixen route to construction sites, with rotating drums mounted on trucks
Application
Concrete mixers are used across all construction sectors: building construction (foundations, walls, slabs), roads, bridges, dams, and any project requiring concrete. Ready-mix plants rely on large stationary mixers for mass concrete supply, while precast factories use pan or planetary mixers for precise mixes. India’s booming infrastructure and housing sectors use mixers everywhere from small construction sites to large RMC (ready-mix concrete) plants.
Material Considerations
Mixers are built of high-strength steel to withstand abrasive aggregates and high torque. Drums and blades often use alloy steels (or manganese steel liners) for wear resistance
Corrosion resistance is less critical since concrete is not highly corrosive, but components exposed to weather may use galvanized or painted steel to prevent rust. Portability (for small mixers) demands lighter frames (thin steel or aluminum), whereas high-capacity plant mixers use massive steel structures and concrete foundations. Durability (against wear and fatigue) is paramount.
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