Aggregate Hopper
Stores the aggregates used in the concrete mix separately before they enter the production process.
Volumetric Concrete Explained
What Is A
Volumetric Concrete Mixer?
A volumetric concrete mixer is a mobile concrete production system that stores the individual materials required to make concrete separately and combines them on site when concrete is needed.
Cement, aggregates, water and admixtures are carried separately rather than being fully mixed before arrival. During production, these materials are proportioned and introduced into the mixing system to produce fresh concrete directly at the point of use.
INSIDE A VOLUMETRIC MIXER
KEY SYSTEMS
Cement System
Cement is stored independently and delivered into the production process in controlled proportions.
Water System
Water is introduced at the required rate as the concrete materials move towards the mixing stage.
PROALL VOLUMETRIC CONCRETE MIXER
Conveyor System
Moves the measured aggregates towards the rear of the mixer ready to be combined with the remaining materials.
Admixture System
Where required, admixtures can be introduced during production to suit the specified concrete mix.
Mixing Auger
The measured materials are combined and mixed to produce fresh concrete before it is discharged on site.
01
02
03
04
05
06
PROALL VOLUMETRIC CONCRETE MIXER
Aggregate Hopper
Stores the aggregates used in the concrete mix separately before they enter the production process.
Cement System
Cement is stored independently and delivered into the production process in controlled proportions.
Water System
Water is introduced at the required rate as the concrete materials move towards the mixing stage.
Conveyor System
Moves the measured aggregates towards the rear of the mixer ready to be combined with the remaining materials.
Admixture System
Where required, admixtures can be introduced during production to suit the specified concrete mix.
Mixing Auger
The measured materials are combined and mixed to produce fresh concrete before it is discharged on site.
THE VOLUMETRIC PRINCIPLE
THE MATERIALS TRAVEL SEPARATELY.
THE MATERIALS TRAVEL SEPARATELY.
THE CONCRETE IS PRODUCED ON SITE.
ON-SITE CONCRETE PRODUCTION
How The System Comes Together.
The key principle behind a volumetric concrete mixer is that the raw materials remain separate until concrete production begins. This allows the mixer to measure and combine cement, aggregates, water and admixtures during operation rather than transporting a fully mixed load of concrete.
As production starts, the materials move through the mixer in controlled proportions before entering the mixing auger. Fresh concrete is then produced continuously and discharged directly where it is required.
This method of on-site concrete mixing gives the operator control over when production starts, the quantity of concrete produced and the requirements of the individual job.
Explore ProAll Volumetric Mixers
The Volumetric Mixing Process
How Does A Volumetric
Concrete Mixer Work?
A volumetric concrete mixer works by measuring and combining the individual ingredients of concrete during production, rather than transporting a fully mixed batch to site.
Aggregates, cement, water and admixtures remain separate until they are required. The materials are then proportioned, transferred into the mixing system and combined to produce fresh concrete directly on site.
01
Materials Are Stored Separately
The ingredients used to produce concrete are carried separately on the volumetric mixer. Aggregates, cement and water remain isolated until the operator begins concrete production.
Aggregates
Cement
Water
02
The Required Mix Is Selected
The required concrete mix determines the proportions of the individual materials used during production. On modern ProAll volumetric mixers, the control system helps manage production around the selected mix design.
Mix Design
Material Ratios
Control
03
Materials Are Measured During Production
As concrete production begins, the dry materials are proportioned and transferred through the mixer. Calibration and material controls allow the required quantities of cement and aggregates to be delivered consistently into the production process.
Measured Materials
Calibration
Proportioning
04
Water And Admixtures Are Introduced
Water is added at a controlled rate as the measured dry materials move towards the mixing system. Where required by the concrete specification, admixtures can also be introduced during production.
Controlled Water
Admixtures
Concrete Mix
05
The Concrete Is Mixed
The measured materials enter the mixing auger at the rear of the volumetric mixer. Cement, aggregates and water are combined as they move through the auger, producing fresh concrete continuously during operation.
Mixing Auger
Fresh Concrete
Continuous Mixing
06
Fresh Concrete Is Discharged On Site
Once mixed, the fresh concrete leaves the mixing auger and is discharged directly where it is required. Production can continue while material remains available, or it can be stopped and started to suit the requirements of the job.
On-Site Concrete
Fresh Production
Controlled Output
PROCESS PRINCIPLE
CONTINUOUS VOLUMETRIC PRODUCTION
Materials In.
Materials In.
Fresh Concrete Out.
Unlike a pre-mixed load, a volumetric concrete mixer produces concrete as the individual materials move through the machine. Mixing continues for as long as concrete is required and sufficient materials remain available.
Production can also be stopped and restarted, giving the operator greater control over the quantity of concrete produced for different stages of a job.
LEARN MORE
Understanding Volumetric Concrete Production.
Measurement + Mix Control
How Are Materials Measured In A Volumetric Concrete Mixer?
In a volumetric concrete mixer, cement, aggregates and water are measured and proportioned during production according to the required concrete mix design.
Rather than carrying a pre-mixed load, the materials remain separate until concrete production begins. The mixer then controls how each material is delivered before the ingredients are combined in the mixing system.
Material Proportioning
FROM STORED MATERIALS TO CONTROLLED CONCRETE PRODUCTION
01
Cement
Cement is delivered through the mixer at calibrated settings so the required quantity can be introduced during concrete production.
02
Aggregates
Aggregates are transferred from their storage compartments and proportioned as they move through the mixer towards the mixing system.
03
Water
Water is introduced separately at a controlled rate according to the requirements of the selected concrete mix.
CONTROL POINT
Mix Design
Mix Design
+ Calibration
The required mix design defines the target proportions. Calibration establishes how the mixer delivers the individual materials needed to reproduce those proportions during production.
CONTROLLED OUTPUT
Materials Measured.
Concrete Produced.
Once the individual materials are proportioned, they are brought together and introduced into the mixing system where fresh concrete is produced continuously on site.
PRODUCTION SEQUENCE
Measure → Combine → Mix
THE CONTROL PROCESS
01
Mix Design
Target material proportions defined
02
Calibration
Material delivery settings established
03
Measurement
Materials proportioned during production
04
Mixing
Fresh concrete produced on site
Why Calibration Matters
Measurement Starts With A Calibrated Mixer.
Volumetric mixer calibration establishes how the machine delivers its individual concrete materials during operation. This creates a known relationship between the mixer settings and the quantities of cement, aggregates and water being introduced.
The concrete mix design provides the required proportions. Calibration then allows the production system to be set and checked so those proportions can be delivered consistently as concrete is produced.
Because the materials remain separate until production, each part of the system can be controlled before the ingredients enter the mixing auger and become fresh concrete.
Volumetric Mixer Service + Calibration
01
CEMENT METERING
Cement Delivery
The cement system is calibrated so its delivery can be related to the operation of the metering system during concrete production.
02
AGGREGATE CONTROL
Aggregate Proportioning
Aggregates are transferred through the mixer at controlled settings so the required material proportions can be maintained during production.
03
WATER CONTROL
Controlled Water
Water is introduced independently as the dry materials move through the system, allowing delivery to be controlled around the selected mix.
MATERIAL CONTROL
The Mix Design Sets The Requirement. Calibration Turns It Into Production.
Volumetric concrete production relies on the individual materials being controlled before they are combined and mixed.
Modern Volumetric Mixer Controls
How Are Modern Volumetric Concrete Mixers Controlled?
Modern volumetric concrete mixers use digital control systems to manage concrete mix designs, calibration settings and production from a central operator interface.
On ProAll volumetric mixers, Commander 2.0 brings these functions together through a touchscreen system designed to give operators direct access to mixer settings, jobs, diagnostics and concrete production information.
PROALL TECHNOLOGY
COMMANDER 2.0
The digital control centre behind modern ProAll volumetric concrete production.
Commander 2.0 provides touchscreen access to mixer settings, calibrations, concrete mix designs, active jobs, job history and machine information — bringing key volumetric mixer controls into one operator interface.
01
Mix Designs
02
Calibration
03
Job Control
04
Diagnostics
PROALL / COMMANDER 2.0
TOUCHSCREEN CONTROL
MIXER CONTROL INTERFACE
MIX DESIGN / CALIBRATION / JOB MANAGEMENT
COMMANDER 2.0
Digital control of key volumetric mixer, production and job functions from one operator interface.
MIX DESIGN CAPACITY
50
STORED MIX DESIGNS
BUILT FOR DIFFERENT JOBS
Store Up To 50 Concrete Mix Designs.
Commander 2.0 can hold up to 50 concrete mix designs within the control system, giving operators fast access to the mix requirements needed for different jobs and applications.
Instead of rebuilding the same production setup each time, stored mix designs can be selected directly through the Commander interface, helping make changes between concrete specifications quicker and more straightforward.
01
Store
Concrete mix designs
→
02
Select
The required mix
→
03
Produce
Concrete on site
CENTRAL CONTROL
What Does Commander 2.0 Do?
Commander 2.0 provides a central digital interface for managing important volumetric mixer settings, concrete mix designs, production functions and machine information.
01
MIX CONTROL
Mix Designs
Up to 50 concrete mix designs can be stored within Commander 2.0, allowing operators to select the required production setup directly through the touchscreen interface.
02
MACHINE SETUP
Calibration
Calibration functions are accessible through Commander, helping operators manage the settings used to control material delivery and concrete production.
03
PRODUCTION
Job Management
Operators can manage active and queued jobs and review previous production information, helping keep job records connected with volumetric mixer operation.
04
MACHINE INFORMATION
Diagnostics
Machine information and system data provide greater visibility into mixer operation and help support troubleshooting and diagnostic work.
02 / PRODUCTION CONTROL
From Mix Design To Concrete Production.
Once the required concrete mix design has been selected, the control system links that mix with the mixer settings used during production, helping the operator manage material delivery as fresh concrete is produced on site.
01
Automated Water Control
ProAll's automated water system can control the quantity of water required for the selected mix design while retaining manual adjustment where required.
02
Cement Metering Control
Variable-speed cement metering allows cement delivery to be adjusted around the requirements of the selected concrete mix during production.
03
Production Information
Mixer information, job history and production-related data can be accessed through the Commander interface, keeping key operational information available to the operator.
PROALL / COMMANDER 2.0
One Mixer. Up To 50 Stored Mix Designs.
Explore ProAll volumetric concrete mixers supplied and supported by Armcon across the UK.
Explore ProAll Mixers
Volumetric Mixer FAQs
Frequently Asked Questions About Volumetric Concrete Mixers
Find clear answers to common questions about how volumetric concrete mixers work, how materials are measured and how modern mixer control systems manage concrete production.
These answers cover the operating principles behind volumetric mixing, calibration, on-site production and ProAll control technology.
01
How Does A Volumetric Concrete Mixer Work?
How Does A Volumetric Concrete Mixer Work?
A volumetric concrete mixer carries the main concrete materials separately and combines them during production. Aggregates, cement and water are proportioned as required before being brought together in the mixing auger, where fresh concrete is produced and discharged on site.
This means the concrete is mixed when it is needed rather than being transported to site as a pre-mixed load.
02
Are Materials Stored Separately In A Volumetric Mixer?
Are Materials Stored Separately In A Volumetric Mixer?
Yes. The materials used to produce concrete are carried in separate compartments until production begins.
Cement, aggregates and water remain separate on the mixer before being measured and introduced into the production process. Keeping the materials separate allows the mixer to produce concrete directly on site when required.
03
Does A Volumetric Mixer Mix Concrete On Site?
Does A Volumetric Mixer Mix Concrete On Site?
Yes. A volumetric mixer produces fresh concrete on site. The individual materials are proportioned during production and then combined in the mixing auger at the rear of the mixer.
Concrete is therefore produced as it is required rather than being fully mixed before arriving at the job.
04
Can A Volumetric Mixer Stop And Start Production?
Can A Volumetric Mixer Stop And Start Production?
Yes. Volumetric concrete production can be stopped and restarted by the operator as required.
Because the raw materials remain separate until production, the mixer can stop producing concrete and begin again when more material is needed for the job.
05
How Are Materials Measured In A Volumetric Concrete Mixer?
How Are Materials Measured In A Volumetric Concrete Mixer?
Materials are proportioned during concrete production according to the selected mix design and the calibrated settings of the mixer.
Calibration establishes how the mixer delivers materials such as cement, aggregates and water. Those settings are then used during production so the required material proportions can be reproduced.
06
Do Volumetric Concrete Mixers Need Calibrating?
Do Volumetric Concrete Mixers Need Calibrating?
Yes. Calibration is an important part of volumetric mixer operation because it establishes how the mixer delivers each material used in the concrete mix.
Proper calibration allows the required mix design to be translated into practical mixer settings for concrete production. Armcon provides volumetric mixer calibration and servicing across the UK.
07
What Is Commander 2.0 On A ProAll Volumetric Mixer?
What Is Commander 2.0 On A ProAll Volumetric Mixer?
Commander 2.0 is ProAll's digital mixer control system. It provides touchscreen access to key mixer functions including mix designs, calibration settings, job management, job history and machine information.
The system is designed to bring important production and mixer controls together through one operator interface.
08
Can A Volumetric Mixer Produce Different Concrete Mix Designs?
Can A Volumetric Mixer Produce Different Concrete Mix Designs?
Yes. Volumetric mixers can be configured around different concrete mix designs because the individual materials are stored separately and proportioned during production.
On ProAll mixers using Commander control systems, mix designs can be entered and selected through the operator interface, allowing the mixer setup to reflect the requirements of different jobs.