Home > SMP800G Stabilized Soil Mixing Plant — 800 t/h Continuous Mixing
The SMP800G is a stabilized soil mixing plant — a different machine from a concrete batching plant, built to produce stabilized base course material for roads, highways, airports and rail subgrades at 800 t/h. It runs a continuous mixing process rather than batch-by-batch cycles: aggregate flows from five 15 m³ bins through VFD-controlled discharge gates, joins metered streams of cement (or lime) and water, and passes through a continuous mixing unit driven by a 110 kW motor into a 12 m³ finished-product hopper that feeds dump trucks running below. There is no batch cycle to wait for — material moves through the plant continuously while the mix proportions are held by component-level metering.
That continuous, high-throughput design is what makes the SMP800G the natural plant for cement-treated base (CTB), lime-stabilized soil and other road-base mixes used to build pavement subbase and base layers under highways, expressways and airfields. Because stabilized soil uses a low binder content (a few per cent cement or lime by weight) and is laid on a paver rather than poured, the plant is engineered very differently from a concrete batching plant — wider aggregate bins, no twin-shaft mixer, VFD-driven continuous gradation control, and a finished-product hopper sized to load trucks one after another without interruption. The plant is built and tested at the TRUEMAX factory in Haining to ISO 9001:2015 and CE standards, supplied with the same complete after-sales programme — three-minute response, 24-hour solutions, remote intelligent service — as the rest of the line.
1. 800 t/h continuous mixing — Output is measured in tonnes per hour, not cubic metres — and at 800 t/h the SMP800G feeds a road-base laying operation continuously, with no batch cycle to interrupt supply.
2. VFD-controlled aggregate discharge — Variable-frequency drives regulate the discharge speed at each aggregate bin, so the gradation entering the mixer is held by adjusting motor speed in real time — the heart of continuous-mix control.
3. Five-bin, five-aggregate batcher (15 m³ × 5) — Five 15 m³ aggregate bins handle five aggregate types, enough for the multi-fraction gradations used in modern stabilized base mixes (different stone sizes, sand fractions and recycled material).
4. Continuous mixing unit, 110 kW — A continuous mixing chamber with a 110 kW drive replaces the twin-shaft compulsory mixer used on concrete plants — designed for the lower binder content and the through-flow operation of stabilized soil rather than for batch concrete.
5. Component-level weighing accuracy — Cement and water are metered to ±1% (per each component unit), aggregate to ±2% — the binder content of a stabilized base depends on holding these tight, since the mix often contains only 3–6% cement by weight.
6. 12 m³ finished-product hopper — A 12 m³ surge hopper above the truck-loading area buffers the continuous output, so dump trucks can swap in and out without stopping the plant — important for keeping the laying paver fed.
7. Handles cement, lime and water — Works with cement-treated, lime-treated and combination stabilized-soil mixes; binder type is selected at silo and metering rather than changing the mixer.
8. 177 kW total plant power and full TRUEMAX service — 177 kW for the main plant (excluding silos and screws), plus pre-sale tailored configuration, on-site commissioning and operator training, three-minute service response and 24-hour solutions, with a remote intelligent service and self-diagnosis system supporting the plant in service.
| Item | Unit | SMP800G |
| Output | ||
| Theoretical Productivity | m³/h | 800 |
| Mixing Method | / | Continuous |
| Mixing System | ||
| Mixer Model | / | Continuous mixing unit |
| Motor Power | kW | 110 |
| Aggregate System | ||
| Aggregate Discharge Speed Control | / | VFD (variable frequency) |
| Aggregate Bin Capacity | m³ | 15 × 5 |
| Number of Aggregate Types | / | 5 |
| Weighing Accuracy (per ECU) | ||
| Aggregate | % | ± 2 (ECU) |
| Cement | % | ± 1 (ECU) |
| Water | % | ± 1 (ECU) |
| Output Buffer | ||
| Finished Product Hopper | m³ | 12 |
| Power | ||
| Total Power (excl. silo & screw conveyor) | kW | 177 |
The SMP800G is laid out along the material flow rather than around a central mixer: five aggregate bins in a row feed a collecting belt that runs under them, the cement (or lime) silo and screw conveyor join the stream at the metering point, the continuous mixing unit sits where the streams come together, and the 12 m³ finished-product hopper is positioned over the truck-loading lane at the discharge end. Read the general arrangement against the foundation drawing, silo layout and dump-truck access plan to confirm the plant footprint on site.
Highways, expressways and arterial roads use cement-treated base courses to provide a stiff, durable layer under the surface. The SMP800G mixes aggregate, cement and water at the rate a paving train can lay it, with VFD-controlled gradation holding the mix to specification.
On clay or moisture-sensitive subgrades, lime is mixed with the soil to reduce plasticity and improve bearing capacity. The SMP800G handles lime-stabilized mixes with the same plant by configuring silo and metering for lime rather than cement.
Airport pavement base and subbase layers — under runways, taxiways and aprons — are typically built with cement-stabilized aggregate. An 800 t/h plant matches the very large material volumes airport works demand.
Heavy-load railway subgrades and freight-yard pavements use stabilized soil layers under the ballast or slab. The SMP800G supplies these continuously to the laying operation, with gradation control held by the VFD-driven batcher.
No. A concrete batching plant produces ready-mix concrete in batches, with a twin-shaft compulsory mixer and high binder content (typically 12–15% cement). A stabilized soil mixing plant like the SMP800G produces stabilized base material — aggregate with a low binder content (often 3–6% cement or lime by weight) — through a continuous mixing process for road-base laying. Different output, different mix design, different mixer, different control.
Road and pavement base courses: cement-treated base (CTB) for highways, lime-stabilized subgrade, airport runway and apron base, railway subgrade and similar layers under asphalt or concrete pavements. The output is not concrete; it is stabilized soil or stabilized aggregate, laid by a paver and then compacted.
Continuous mixing means material flows through the plant constantly rather than being mixed in discrete batches. There is no cycle period because the plant does not start and stop between batches — aggregate, binder and water are metered into the mixing unit and stabilized material flows out of it without interruption. This suits the steady, high-rate output a paving operation needs.
Stabilized soil is specified by mass — the binder content (typically 3–6% by weight) is a mass ratio of cement or lime to dry aggregate, and the laying paver is fed by truckload weight. The SMP800G is rated at 800 t/h, the standard industry unit for stabilized-soil plants, where concrete plants are rated in m³/h because concrete is delivered and specified by volume.
By VFD (variable-frequency drive) control on the aggregate discharge motors. Each of the five aggregate bins has its discharge speed regulated in real time, so the proportion of each aggregate entering the belt is held to the mix design as production runs. Cement and water are metered into the stream at the mixing point, both to ±1% per component.
It is a 12 m³ surge buffer above the truck-loading area. Because the mixer runs continuously, the hopper lets one truck pull out and the next pull in without stopping the plant — the steady output is held in the hopper for a few seconds while the trucks change. That continuity is what keeps the laying paver fed downstream.
Yes. The binder is selected at the silo and metering, not at the mixer. The plant runs cement-treated, lime-treated or combination stabilized-soil mixes — only the silo, screw and metering configuration changes. Tell us your binder programme and we will configure the supply.
Standard supply is the main plant: the 5-bin aggregate batcher with belt, the continuous mixing unit, the finished-product hopper, the weighing and control system. Cement (or lime) silos, screw conveyors, foundation design, installation, commissioning and operator training are configured and quoted to your project. After-sales support runs to a three-minute service response, 24-hour solutions and a remote intelligent service with self-diagnosis.
The SMP800G is one of two stabilized soil mixing plants TRUEMAX builds — paired with the larger SMP1000G at 1,000 t/h with six aggregate bins. Both are continuous-mixing plants for road-base material, separate from the TRUEMAX concrete batching plant family (CBP60S–CBP240S stationary, CBP60M–CBP100M mobile, CBP180C–CBP240C modular). If your project produces ready-mix concrete, a batching plant is the right family; if it produces stabilized base for roads or airfields, the SMP series is the family — pick by output (800 or 1,000 t/h) and by the aggregate bins you need.
On a road project the SMP800G sits behind the laying operation: aggregate is supplied from stockpiles into the bins, the plant mixes it with cement (or lime) and water continuously, dump trucks shuttle the stabilized material to the paving site, and a paver lays it. The continuous output keeps the paver moving — interruptions at the plant become interruptions in the laying, which costs site time and risks cold joints. That is why continuous-mix plants and finished-product hoppers are the standard for road-base work, where batch concrete plants are not.
Three things drive the choice. Output, in tonnes per hour, must match the paver's laying rate and the haul-cycle of the trucks. Aggregate bin count must match the number of aggregate types in the mix design — five for most projects, six where the mix uses an additional fraction. And binder programme — cement-only, lime-only, or both — drives the silo and metering configuration. The SMP800G is the 800 t/h, 5-bin model, sized to the majority of highway, airport and rail base-course operations.
