Concrete mixer truck
A concrete mixer truck (ABS, concrete mixer, mixer) is a truck equipped with a rotating container for transporting concrete.
Truck Mixer Classification
ABS are a subspecies of concrete mixers, which also come in:
- stationary,
- mobile (in the form of trailers).
In addition, the following classifications of ABS are distinguished:
- According to the type of location of the mixing plant and the direction of unloading, ABS are divided into:
- ABS with unloading «back». The most popular type in Russian concreting practice,
- ABS with forward unloading. Allows the mixer driver to manage and control the unloading process without leaving the cab;
- according to the type of mixing equipment drive :
- mechanical — an outdated version (a chain drive or a power take-off shaft from the engine is used to rotate the drum),
- hydraulic — a modern standard (a hydraulic motor is used to rotate the drum),
- by type of mixing equipment engines :
- autonomous engines — noisier, but more reliable — in the event of a car engine breakdown, mixing of the concrete mixture does not stop,
- engines on the chassis are more environmentally friendly, less noisy, help to reduce the weight of the ABS.
Device. Mixing technologies
The use of specialized transport for the transport of concrete mix is subject to clause 7.2. GOST 7473-94 “Concrete mixes. Specifications”: “The methods used for transporting concrete mixtures must exclude the possibility of precipitation, violation of uniformity, loss of cement mortar, and also ensure the protection of the mixture along the way from exposure to wind and sunlight.”
The safety and homogeneity of the concrete mix during transportation is ensured by the rotation of the drum. Inside the drum are spiral blades. When rotated in one direction (during loading and transport), the blades drive the mixture deeper into the drum. When rotating in the other direction (during unloading), the Archimedes Screw mechanism is used, with which the mixture is unloaded.
Preparation of the concrete mixture is possible directly in the truck mixer during transportation, when cement, water and aggregates are loaded into the drum. In the Russian practice of concreting, the scheme for transporting ready-mixed concrete mixed at the plant is more common.
- Place of docking when supplying concrete from a concrete mixer truck to a concrete pump truck
- Unloading concrete from truck mixer
- Working condition of truck mounted concrete pump, mid-boom
- Working Condition of Concrete Pump Truck, Upper Boom
