Mix. Stabilize.
Build to Last.
Two tractor-mounted machines — one complete in-situ stabilization system. Precise binder application followed by uniform mixing to 350 mm depth. IRC:SP:89 compliant. Proven on Black Cotton Soil.
Two Machines. One Complete System.
The THOR ST and DCW 2.2 are engineered to work in tandem — the spreader applies binder at calibrated rate, the stabilizer mixes uniformly to the full design depth in one pass.
The RK4 rotor with carbide-tipped teeth mills soil to the set depth while blending binder uniformly — cement, lime, fly ash, GGBS, or foamed bitumen — in a single coordinated pass. Integrated water injection maintains OMC throughout.
- RK4 rotor — adjustable working depth up to 350 mm
- Rear PTO drive, Cat. 2 three-point hitch
- Works with all dry and liquid chemical binders
- Integrated water injection system — maintains OMC during mix
- Typical output: ≈ 480 m²/hour at 3 km/h working speed
Accurate binder application is as critical as mixing — under-dosing fails to reach target UCS; over-dosing causes shrinkage cracking. The DCW 2.2 applies cement, lime, and fly ash at ±2% accuracy, controlled by tractor forward speed.
- ±2% application accuracy — prevents under and over-dosing
- Speed-proportional control — rate adjusts automatically with travel speed
- Front-mount configuration — pairs with THOR ST on same tractor
- Compatible with OPC, PPC, PSC, quicklime, fly ash, GGBS
- 2.2 m spreading width — matched to THOR ST working width
Five Steps to a Compliant Stabilized Layer
In-situ surface mixing per IRC:SP:89 — from binder spreading to curing membrane, achievable in a single working shift for most road subgrade projects.
Grade and scarify the subgrade. Check moisture — target within 2% of OMC. For PI > 20, apply quicklime first and allow 24–72 hours for cation exchange before cement treatment.
DCW 2.2 applies cement or lime at the calibrated design rate. Speed-proportional control maintains ±2% accuracy — preventing the two most common failure modes: under and over-dosing.
RK4 rotor mills to design depth up to 350 mm, blending binder uniformly through the full treatment zone. Integrated water injection maintains OMC throughout the pass.
Complete compaction within 2 hours of cement mixing. Pneumatic + smooth drum roller achieves 97% Modified Proctor MDD. Verify by nuclear density gauge or sand replacement.
Apply bituminous curing membrane within 30 minutes of final rolling. Core at 7 days — soaked UCS ≥ 1.5 MPa per IRC:SP:89 required before surfacing proceeds.
CSH and CAH crystals formed during cement hydration are permanent. A correctly stabilized subgrade retains 70–90% of its bearing capacity when fully saturated — surviving every monsoon.
Which Material for Your Soil?
Material selection follows plasticity index. Specifying cement on PI > 35 clay without lime pre-treatment is the most common cause of stabilization failure in India.
Where the THOR ST Works
From national highway subgrade to rural PMGSY roads and agricultural hardpan breaking — one machine, multiple use cases across India's diverse soil and climate conditions.
Lime + cement two-stage treatment on Black Cotton Soil for NHAI and PMGSY projects. Achieves IRC:SP:89 structural stabilization that counts toward IRC:37 pavement thickness design.
Mills failed pavement and subgrade in-place, blends cement or foamed bitumen, recompacts as new stabilized base. Costs 30–50% less than conventional rebuild — no excavation, no aggregate import.
Lime stabilization reduces seepage, increases shear strength against mass movement, and provides an erosion-resistant surface — protecting adjacent farmland from monsoon waterlogging.
Deep rotor penetration fractures compaction layers blocking monsoon infiltration. Combined with lime for pH correction — reduces surface runoff by 40–70% and increases crop water availability.
High UCS (2.0–5.0 MPa) cement stabilization for container yards, warehouse slabs, and airport aprons. 7-day strength gain meets fast construction programmes without aggregate import.
Lime or calcium chloride surface stabilization for unpaved mine roads. Eliminates fine particle detachment, reduces PM10 dust emissions, and extends haul road service life without structural treatment.
Built Around
IRC:SP:89
Every THOR ST specification — working width, treatment depth, water injection rate, rotor geometry — is calibrated to the acceptance criteria of India's soil stabilization standard. When the machine completes its pass, the layer is ready to test.
Discuss Your Project →Full 仕様 Comparison
Both machines ship as the India Watanabe stabilization package. Front + rear configuration allows a single tractor and one operator to complete spreading and mixing in one pass.
Common Questions
Questions we receive most often from Indian road construction contractors and government project engineers before specifying the THOR ST system.
Ready to Stabilize Your Project?
Tell us your soil type, PI value, project state, and treatment depth — we will recommend the right binder specification within 24 hours.
