Cold Mix and Stabilization Plant

VCX Cold Mix and Stabilization Plant

A cold mix plant (also called a pugmill plant, a soil stabilization plant or a wet mix plant) mixes aggregate, water and binder continuously without heating. It makes granular base, cement-treated base (CTB),soil-cement and cold mix for roads, ports, railways, dams and airports.

The Vimpo VCX range has five models from 200 to 600 t/h. VCX-200-M and VCX-400-M are mobile plants with two towable units. VCX-200-S and VCX-400-S are the same plants for a fixed site on a foundation. These four models work with cement, bitumen emulsion or foamed bitumen. VCX-600-S is a stationary plant for high-output mechanical stabilization. All models have a belt scale on the collecting conveyor, a flowmeter for the water and a twin-shaft pugmill with HARDOX wear plates.

How Does a Cold Mix Plant Work?

Dosing and Weighing

Each aggregate bin has its own dosing belt. The collecting conveyor carries the blend over a belt scale, so the plant knows the aggregate flow in t/h. The bin ratios come from the recipe on the control screen.

Mixing

Water and binder go into the twin-shaft pugmill at the recipe rate. A magnetic flowmeter measures the water. The two counter-rotating shafts mix the material in one continuous pass to a uniform product at the target moisture.

Loading

The discharge conveyor carries the mix to the truck loading bin. The operator opens the pneumatic gate from the control desk and loads the trucks.

Mobile VCX-M Plants

VCX-200-M and VCX-400-M come as two towable units: the bin group and the mixer group with the discharge conveyor, the truck loading bin and the control cabin. The structure is modular and foldable, and the plant needs only a minimum foundation. The VCX-400-M has 4 × 12 m³ aggregate bins, a 900 mm collecting conveyor with belt scale, a twin-shaft pugmill with 2 × 37 kW synchronized drives and a 10 m³ truck loading bin.

• VCX-200-M: 200 t/h, 3 bins, pugmill 1 × 37 kW
• VCX-400-M: 400 t/h, 4 × 12 m³ bins, pugmill 2 × 37 kW
• 2 towable units, minimum foundation
• Cement, bitumen emulsion or foamed bitumen

Stationary VCX-S Plants

VCX-200-S and VCX-400-S are the stationary versions of the mobile plants for quarries and long projects. They have the same process and the same binder options. VCX-600-S is the high-output model for mechanical stabilization with cement and water: 600 t/h, 5 aggregate bins of 15 m³, a pugmill with 2 × 37 kW drives, and a cement silo with dosing system.

• VCX-200-S: 200 t/h, 3 bins, pugmill 1 × 37 kW
• VCX-400-S: 400 t/h, 4 × 12 m³ bins, pugmill 2 × 37 kW
• VCX-600-S: 600 t/h, 5 × 15 m³ bins, pugmill 2 × 37 kW
• Stationary, on foundation

VCX Cold Mix Plant Features

Mass Measurement

A belt scale on the collecting conveyor measures the aggregate flow. The water and the binder follow the recipe, so the mix stays the same when the plant output changes.

Twin-Shaft Pugmill

Two shafts with paddles turn in opposite directions. Synchronized geared motors drive them. HARDOX wear plates protect the mixer body against abrasive aggregate.

Aggregate Bins

Each bin has its own dosing belt, an empty-bin sensor and a bin screen. On the VCX-400 the bins are 12 m³ each with 2.2 kW dosing drives.

Recipe Control

The operator works from an air-conditioned cabin with a piano-type desk and a screen. The plant runs in manual or automatic mode, stores recipes and loads the trucks from the desk.

VCX Models Compared

Options

The Vimpo VCX is also available with:

• Cement / additive silo: 50 – 100 m³ with screw conveyor dosing
• Bitumen emulsion dosing: 200 and 400 t/h models, for cold mix and cold recycling
• Foamed bitumen injection: 200 and 400 t/h models, for bitumen-stabilized material (BSM)
• Additional aggregate bin: To the mix design

Where Is a Cold Mix Plant Used?

On road and motorway projects for the base and sub-base layers, and for cement-treated base and soil-cement. Ports, dams, railways and airports use the same plant mix for fill, sub-ballast and pavement base. With bitumen emulsion or foamed bitumen, the mobile and the 200 / 400 t/h stationary models also make cold mix and cold recycled material from RAP.

Vimpo Bitumen Plants

Make the bitumen emulsion for the VCX with a Vimpo bitumen emulsion plant, and store the binder in Vimpo bitumen tanks.

Cold Mix Plant: Frequently Asked Questions

What is the difference between a cold mix plant and a stabilization plant?

Both use the same twin-shaft pugmill. A stabilization plant mixes aggregate with water and cement for base and sub-base layers. A cold mix plant also doses bitumen emulsion or foamed bitumen. The VCX 200 and 400 t/h models do both; the VCX-600-S is for mechanical stabilization.

Which binders can the VCX use?

Cement, bitumen emulsion and foamed bitumen. The cement silo with screw dosing, the emulsion dosing system and the foamed bitumen injection are options. The VCX-600-S works with cement and water.

How is the mix kept accurate?

Each bin has its own dosing belt, a belt scale measures the aggregate flow and a magnetic flowmeter measures the water. The recipe sets all rates from the control screen.

What is the difference between the mobile and the stationary models?

Mobile VCX-M plants come as two towable units with a minimum foundation and move between job sites. Stationary VCX-S plants stand on a foundation at a quarry or a long project. The 200 and 400 t/h models have the same process in both versions.

Get a Quote for a Cold Mix Plant

Tell us your capacity, mobile or stationary, your material and your binder; our team will prepare the quotation and the technical data sheet.