Construction mixers, also known as concrete mixers, are specialized machines designed for mixing various construction materials, primarily concrete, cement, and sand-gravel mixtures. These devices play a crucial role in the construction industry and are used on construction sites, in renovation projects, and other construction endeavors. Here is a more detailed description of construction mixers:

1. Types of Mixers:

   • Drum Mixers: In drum mixers, materials are mixed inside a drum that rotates around a horizontal or vertical axis. These mixers can be self-loading or require manual loading of materials.

   • Planetary Mixers: Planetary mixers have multiple rotating blades that move both around their own axis and orbit around the central axis of the drum. This creates more intensive mixing and is suitable for more complex concrete compositions.

   • Auger Mixers: These mixers use an auger (a screw-like mechanism) to mix materials. They are typically used for mixing dry construction mixes and cement.

2. Volume and Productivity: Construction mixers are available in various sizes and capacities, ranging from portable mixers for small jobs to large stationary machines for significant construction projects. The productivity of a mixer depends on its size and power.

3. Engine and Drive: Mixers are typically equipped with electric or gasoline engines that provide the rotational force to the drum. This allows the machine to mix materials efficiently and uniformly.

4. Mobility: Some construction mixers are portable, equipped with wheels and a handle for easy movement around the construction site. Others may be stationary and installed at a specific location.

5. Application: Construction mixers are used for preparing concrete and construction mixes, which are then used for pouring foundations, screeds, concrete walls, road surfaces, and other construction elements.

Construction mixers are an integral part of construction work, allowing for the quick and efficient preparation of concrete mixes with the required strength and quality characteristics. Their choice depends on the specific project requirements and the volume of work.