The working principle of a self loading concrete mixer is based on five main steps: automatic loading, accurate weighing, efficient mixing, mobile transportation, and controlled discharging. By combining these functions, the machine helps construction teams produce fresh concrete directly where it is needed. Unlike traditional concrete production methods that require separate loaders, batching machines, and mixer trucks, a self loading concrete mixer can complete the entire concrete production process independently on the construction site. This working method is especially suitable for small and medium construction projects, remote areas, road construction, rural infrastructure projects, and locations where ready-mixed concrete supply is limited.
Before diving into operation steps, it is necessary to clarify the core assemblies that jointly drive the whole machine. A qualified self‑loading concrete mixer mainly consists of 4 major subsystems:
The hydraulic system is the power source for the loading operation.
It controls:
A reliable hydraulic system allows smooth operation and improves working efficiency.
The weighing system determines concrete quality.
Its main functions include:
Accurate measurement is especially important when producing concrete with specific strength requirements.
The mixing drum is responsible for producing uniform concrete.
A high-quality drum design should provide:
The blade structure inside the drum determines how effectively materials are blended.
Unlike ordinary mixer trucks, many self loading mixers use hydraulic drive technology.
This provides:
This lays the groundwork for the equipment to operate on rugged mountainous terrain.
Many buyers only focus on mixing drum volume, while ignoring the matching performance of supporting subsystems. Poor coordination between loading arm, weighing sensor and hydraulic power will directly cause inaccurate proportioning, uneven mixing or frequent equipment failure.
The first stage of operation is automatic loading. The whole loading cycle is driven by the hydraulic system controlled by cabin electronic units, without assistance from external loading machinery. Operators finish all operations inside the driving cabin, which reduces labour demand by more than 70 % compared with traditional manual feeding workflows.
After one‑button startup, the central control system sends instructions to the hydraulic valve group. The front‑mounted hydraulic loading arm equipped with high‑capacity bucket carries out flexible pitching and lifting movements driven by hydraulic cylinders. The operator aligns the bucket to sand‑gravel aggregate stockpiles. The bucket scoops aggregates including sand, gravel and stone chips.
Once the bucket reaches full load, the loading arm lifts smoothly to the top position of the mixing drum feed inlet. The hydraulic gate of the bucket opens, and raw aggregates slide down along the feeding channel into the mixing drum hopper. The whole scooping‑lifting‑dumping sequence runs coherently. High‑quality self‑loading mixers adopt reinforced loading arm structures to adapt frequent heavy‑load operations on rough construction ground.
Practical tip: Loading performance is restricted by site ground condition and aggregate particle size. Excessively large stone blocks may cause jamming at the feed channel. Operators need to avoid over‑loading beyond rated capacity, otherwise it will bring extra burden to subsequent weighing accuracy and hydraulic service life.
Concrete strength, anti‑permeability and working performance are largely determined by material proportioning. Bad batching accuracy is one of the most frequent causes of unqualified concrete on small job sites. Many low‑end self‑loading mixers on the market rely on rough volume estimation, bringing proportioning errors up to 20‑30 %, which makes concrete quality unstable batch by batch.
AIMIX self‑loading concrete mixers adopt cylinder measurement & control weighing technology together with dynamic algorithm. Multiple high‑precision pressure sensors are installed on independent weighing hoppers for aggregate, powder cement, mixing water and chemical admixtures. Under standard calibration conditions, the proportion error can be controlled within ±1 %.
The touch‑screen control cabin stores hundreds of preset concrete mix formulas, covering common grades ranging from C10 to C50 concrete, anti‑permeability concrete, early‑strength concrete and other special‑purpose mixtures. Each formula stores fixed key parameters including water‑cement ratio, sand percentage, cement dosage and admixture addition rate.
On‑site operators only need to select target concrete specification such as “C35” on the touch‑screen panel. The system automatically calls out corresponding formula parameters. Users can also modify and save custom formulas according to local raw‑material characteristics.
Aggregate, cement powder, water and admixtures are weighed in separate hoppers for initial metering. While raw materials are fed into the mixing drum, sensors continuously capture real‑time weight change data and transmit signals to the central electronic control unit. Once the feeding weight reaches the preset formula value, the system triggers an immediate stop of feeding to guarantee actual material dosage matches design requirements.
Water supply also follows this logic: the on‑board water tank cooperates with metering unit, injecting accurate water volume according to water‑cement ratio, instead of manually estimating water adding amount. This is critical to stabilize concrete slump and compressive strength.
Practical tip: Weighing sensors need regular calibration. Vibration, heavy impact and long‑time dust accumulation will drift weighing reading, so periodic site calibration is required.
Even with accurate material proportioning, poor stirring structure will still cause concrete segregation: aggregate sinks to drum bottom while cement mortar floats on upper layer, resulting in inconsistent concrete quality.
AIMIX self‑loading mixers are equipped with composite mixing assembly of 6 spiral blades plus 8 groups of mixing paddles, forming dual mixing mode of spiral material pushing and paddle shearing force. Under normal working condition, one full batch of concrete can finish mixing within about 15 minutes. The most valuable highlight is “mixing while travelling” function, solving concrete segregation risk during site transfer.
high-speed rotation drives the material to migrate along the axial direction, forming a strong circulation, mixing the aggregate, cement and water quickly.
rotating synchronously with the spiral shaft, generating radial shear force, breaking the cement slurry film on the surface of aggregate and promoting the uniform distribution of fine particles.
equipped with hydraulic drive system, when moving (such as transferring or pouring on site), the mixing machine still keeps low speed, avoiding the concrete sinking and mortar floating due to the static concrete.
After mixing completes, the discharging system is responsible for delivering finished concrete to designated pouring position with zero dead angle, low residual material and fast discharging speed.
270° Hydraulic TurningThe whole mixing tank is mounted on the chassis by the sturdy rotating shaft and large rotating support. The tank is hydraulically driven to achieve 270° horizontal rotation, and can be tilted to a 30° angle to the ground to accelerate concrete flow by gravity.
120° outlet designThe mixing tank discharge opening is designed at 120°, which is conducive to the smooth discharge of materials and is not easy to cause material clogging. This reduces the splashing phenomenon when dropping the material and avoids the waste of material.
Precise positioning of dischargingBy controlling the rotating angle of the tank, the discharging port can be directly and precisely aligned with the pouring place, or directly discharged into the mould or pumping truck hopper.
High‑quality rotary bearing and hydraulic sealing components are essential here: poor‑quality rotating assembly easily suffers oil leakage and jamming under continuous heavy‑load operation.
For construction machinery exported to international markets, operability for local workers directly decides project efficiency and equipment utilization rate. AIMIX self‑loading mixers adopt control panel supporting one‑switch language selection of 7 languages: Chinese, English, Russian, Spanish, French, Portuguese and Indonesian.
Projects in Spain and Latin America can be carried out without any communication barriers.
Designed for users in Russia and CIS countries, with no language barriers when operating the device.
Tailored to the usage habits of local users in Indonesia, making the device easier to operate.
Whether working in cold high‑latitude construction sites in Tajikistan, tropical rainforest areas in Indonesia, or infrastructure projects in Paraguay and Malaysia, local operators can operate touch‑screen and joysticks without language barrier. All core actions: loading, formula selection, weighing parameter adjustment, mixing speed setting, drum rotation and discharging are completed in the cabin. One‑man full‑process operation becomes realisable.
Understanding the working principle is the first step. The key to maximizing your ROI lies in choosing the right drum capacity for your daily output requirements. Even if you fully grasp how self‑loading mixers complete automatic loading, weighing, mixing and discharging, improper model selection will still lead to low construction efficiency, idle equipment or insufficient production capacity. The nominal drum volume directly determines the hourly concrete output, labour‑saving benefits and overall project cost.
| Daily Output | Ideal Applications | Recommended Model |
|---|---|---|
| 10 - 20 m³/h | Country roads, small detached houses, concrete foundations | AS-1.8 / AS-2.6 |
| 20 - 35 m³/h | Medium-sized bridges, factory construction, ready-mix concrete contract manufacturing | AS-3.5 (Hot Seller) |
| 35 - 50 m³/h | Infrastructure, dams, major municipal projects | AS-4.5 / AS-5.5 |
| Model | AS-1.2 | AS-1.8 | AS-2.6 | AS-3.5 | AS-4.5 | AS-5.5 | AS-6.5 |
|---|---|---|---|---|---|---|---|
| Mixing tank capacity(m³) | 1.2 | 1.8 | 2.6 | 3.5 | 4.5 | 5.5 | 6.5 |
| Concrete output(m³/h) | 4.8 | 7.2 | 10.4 | 14 | 18 | 22 | 26 |
| Engine power (kw) | 55 | 78 | 78 | 91 | 91 | 110 | 132 |
| Mixer drum capacity (L) | 1700 | 2680 | 3580 | 4740 | 6800 | 7800 | 9000 |
| Water tank (L) | 400 | 500 | 500 | 620 | 920 | 860 | 1465 |
| Weighing method | Automatic hydraulic weighing system | Automatic hydraulic weighing system | Automatic hydraulic weighing system | Automatic hydraulic weighing system | Automatic hydraulic weighing system | Automatic hydraulic weighing system | Automatic hydraulic weighing system |
| Total weight (Kg) | 5000 | 6100 | 7100 | 7900 | 9200 | 11500 | 12520 |
| Overall size (LxWxH) | 6400x2550x3300 | 7700×2750×3350 | 7860×2750×4100 | 7830×2680×4170 | 7640×2870×4750 | 8450×3100×3640 | 8450×3050×3860 |
| Max. Speed (km/h) | 30 | 35 | 30 | 30 | 35 | 42 | 40 |
| Min. turning radius (mm) | 4700 | 3250 | 5300 | 5300 | 4800 | 6200 | 4800 |
| Drum speed (r/min) | 13 | 13 | 13 | 13-20 | 17 | 20 | 20 |
| Fuel tank (L) | 63 | 75 | 75 | 120 | 120 | 180 | 342 |
| Wheel base(mm) | 2300 | 2750 | 2800 | 2900 | 2480 | 3350 | 2850 |
| Hydraulic tank (L) | 63 | 75 | 75 | 120 | 120 | 180 | 274 |
| Comparison | Traditional Concrete Production | Self Loading Mixer |
|---|---|---|
| Equipment Required | Multiple machines | One integrated machine |
| Loading | Separate loader | Built-in loader |
| Batching | Batching plant | Onboard weighing |
| Mixing | Separate mixer | Built-in mixer |
| Transportation | Mixer truck required | Self-transporting |
| Operators | 5-10 operators | 1 operators |
| Site Setup | More space needed | Less space needed |
| Concrete Supply | External supply | On-site production |
| Transport Distance | Limited by supply | Flexible location |
| Production Control | Centralized | On demand |
| Mobility | Limited | High mobility |
| Remote Projects | Difficult to transport concrete | Suitable for various terrains |
| Material Handling | Multiple steps | Integrated process |
Here we share a video with you, through which you can have a more intuitive understanding of the working principle of the self loading concrete mixer.
The operator controls the main functions through the machine’s control system. Depending on the model, controls can manage loading, drum rotation, water supply, driving, and concrete discharge. This allows one operator to coordinate several operations from the driver’s position.
The loading bucket and steering system give the machine flexibility when approaching material piles. The operator can reposition the machine and adjust the bucket during loading. This allows materials to be collected from different positions around the working area.
The working principle of a self loading concrete mixer is based on equipment integration. Through automatic loading, precise weighing, efficient mixing, mobile transportation, and controlled discharge, the machine simplifies concrete production. For construction projects that require flexibility, fast concrete supply, and reduced equipment coordination, a self loading mixer can provide an efficient solution.
Understanding how self loading concrete mixer works is the first step in selecting the right concrete production method for your project. If you have any further questions, please do not hesitate to contact us.
