DCW 2.2 Alat Penyebar Bahan Pengikat – Kapur & Semen untuk Pekerjaan Jalan
Front-mounted tractor lime/cement binder spreader for soil stabilization. Distributes binder at 2,140 mm working width with electronic cab control — switchable to 1m or 2m via two internal rollers. Works simultaneously with the THOR ST soil stabilizer for single-pass road rehabilitation.
L1,780 mm · H1,740 mm · Mandatory tractor ballast: 1,300 Kg .
DCW 2.2 — Precision Lime/Cement Spreader for Single-Pass Soil Stabilization
The Watanabe DCW 2.2 is a front-mounted tractor lime and cement binder spreader designed to work in direct combination with the rear-mounted THOR ST soil stabilizer for single-pass soil stabilization of rural roads and agricultural infrastructure. Mounted at the front of the CVT tractor, the DCW 2.2 distributes lime or cement binder uniformly across the road surface at a precisely controlled application rate — immediately ahead of the THOR ST's rotor, which mills the binder-covered material to depth and mixes it with water in the same forward pass.
The key operational advantage of the DCW 2.2 over conventional "bag-spread" or broadcast truck spreading methods is precision and uniformity. The binder application rate is controlled electronically from a display installed in the tractor cab — the operator adjusts the delivery rate based on forward speed to maintain the target kg/m² binder dosage regardless of speed variation. Two internal rollers provide selectable distribution width: 2-meter width for the standard road treatment pass, or two independent 1-meter sections for partial-width treatment on roads where one lane can remain open during construction.
The combined DCW 2.2 (front) + THOR ST (rear) single-tractor system eliminates the need for a separate binder spreading pass before the stabilization machine — reducing the total number of equipment mobilizations, the total project duration, and the total construction cost of rural road rehabilitation projects.
Technical Specifications — DCW 2.2
All data from the Watanabe official product brochure (December 2025).
| DCW 2.2 — TECHNICAL DATA | |
|---|---|
| DIMENSIONS | |
| Length (machine body) | 1,780 mm |
| Length (with connections) | 2,680 mm |
| Height | 1,740 mm |
| TRACTOR REQUIREMENTS | |
| Working Width | 2,140 mm |
| Mandatory Tractor Ballast Weight | 1,300 Kg |
| KEY FEATURES | |
| Internal Rollers | 2 (independent) |
| Spreading Width Options | 1 m or 2 m |
| Binder Types | Lime (quicklime/hydrated), Cement |
| Control System | Electronic (cab display) |
| Mounting Position | Front of tractor |
ⓘ 1,300 Kg mandatory weight is the minimum tractor front ballast required to safely carry the DCW 2.2 at the front hitch with loaded binder hopper. Confirm your tractor's front hitch weight capacity and available ballasting before operating. Data from Watanabe official brochure December 2025.
How the DCW 2.2 Works — Two Internal Rollers and Electronic Rate Control
The DCW 2.2's binder hopper holds the powdered lime or cement that will be applied to the road surface. Two internal rotating rollers drive the binder from the hopper through the distribution mechanism and onto the road surface at the controlled application rate. The key advantage of the roller-drive distribution system over gravity-fed or auger-feed alternatives is its ability to deliver a consistent volumetric flow rate — providing uniform ground coverage regardless of small variations in binder particle size or bulk density.
Dual Roller — 1m or 2m Width Selection
The two internal rollers are independently controlled. When both rollers are active, binder is distributed across the full 2,140 mm working width — matching the THOR ST's milling width for a fully uniform binder coverage before the stabilizer pass. When only one roller is active, binder is distributed across a 1-meter section only — allowing the operator to treat one lane while leaving the adjacent lane undisturbed. This is particularly useful on road sections where one-lane traffic must be maintained during construction, or where a partial-width re-treatment of a specific lane or shoulder section is needed without treating the full road width.
Electronic Control System — Cab Display
The DCW 2.2 includes its own electronic control system with a display installed in the tractor cab. The operator monitors and adjusts the binder delivery rate from the cab display without stopping the machine — compensating for forward speed variation to maintain the target binder dosage per square meter. The electronic system logs actual application data, providing a project record of binder quantity and coverage for quality assurance documentation. This is a significant advantage over manual spreading methods for government-funded road projects that require documented quality control records.
Front Mounting — Combined Single-Pass Operation
The DCW 2.2 mounts at the tractor's front three-point hitch — the only configuration that allows the binder to be distributed immediately ahead of the rear-mounted THOR ST stabilizer's rotor in the same forward pass. The separation distance between the DCW 2.2 application point and the THOR ST rotor is the tractor wheelbase — typically 3–4 meters. This ensures the binder is spread uniformly before the rotor mixes it, but is not exposed to wind or rain disturbance for an extended period before incorporation. The single-tractor, front-plus-rear configuration is the most efficient soil stabilization setup available — one operator, one tractor pass, complete binder distribution and soil milling in one coordinated operation.
DCW 2.2 in the Complete Soil Stabilization Workflow
The DCW 2.2 is the binder distribution component in the four-machine soil stabilization system. Its role is to accurately deliver the chemical agent that gives the stabilized road base its structural properties — the THOR ST then physically mixes that chemical agent into the road material to the required depth.
DCW 2.2 Binder Spreader (this machine) — Distributes lime or cement uniformly at the electronically controlled kg/m² rate. 2m width covers the full road surface in one pass; 1m mode for partial-width treatment.
THOR ST Soil Stabilizer — Immediately behind DCW 2.2, mills road material to 0–200 mm depth and mixes with water from the connected water truck. Binder already distributed by DCW 2.2 is incorporated into the mix.
Water Truck (connected to THOR ST) — Supplies controlled water for the stabilization reaction moisture requirement. Follows the THOR ST during operation.
Grading + Compaction — Road profile is graded and the stabilized mix is compacted by a roller. Stabilization strength develops over 7–28 days.
DCW 2.2 Key Differentials — Why Electronic Control Spreader Outperforms Manual Methods
■ Application Versatility — 1m or 2m
Two independent internal rollers allow instant switching between 2-meter (full working width) and 1-meter (single lane) binder distribution. For Korean rural road sections where traffic must be maintained in one direction during construction, 1m-mode allows treating one lane at a time without full road closure — reducing community disruption and contractor liability for access interruption.
■ Integrated Electronic Control
The cab-display control system allows the operator to monitor and adjust binder delivery rate in real time from the tractor cab. Application rate can be set to maintain the target kg/m² dosage regardless of forward speed variation — no interruptions, no manual adjustment stops. The system provides a record of actual application for project quality documentation, which is required for formal road engineering projects.
■ Optimized Single-Pass Operation
Front-mounted distribution followed immediately by rear-mounted THOR ST milling in the same forward pass eliminates the separate binder-spreading pass that conventional stabilization methods require. Removing one full-coverage pass from the project sequence reduces total equipment hours, total fuel consumption, and total project cost — particularly significant on longer road sections where mobilization and pass coverage are the dominant cost drivers.
■ Efficiency and Economy vs. Manual Methods
The conventional "bag-spread" method — manually placing bags of lime or cement and spreading with a brush rake — is both labour-intensive and inherently non-uniform. Uneven binder distribution produces uneven stabilization strength, which creates weak zones in the completed road base that fail at accelerated rates under traffic. The DCW 2.2's mechanized uniform distribution eliminates this variability and reduces labour requirements to zero for the binder distribution step.
Applications — Korean Rural Road and Soil Improvement Projects
농어촌도로 (Rural Road) Rehabilitation with Lime or Cement Stabilization
The most common application of the DCW 2.2 in the Korean context is lime or cement distribution for the in-place stabilization of deteriorated 농어촌도로. The dosage rate is determined by the soil classification of the existing road material (laboratory testing before construction) and the target unconfined compressive strength (UCS) for the completed stabilized base. Cement dosages for typical Korean rural road granular materials range from approximately 4–8% by dry weight; lime dosages for clay soils range from 3–6%. The DCW 2.2 delivers these dosages uniformly at working speed — a capability that hand-spreading cannot reliably replicate across the full road length.
Mountain Farm Access Road Improvement
On mountain farm access roads in Gangwon-do and the Gyeongsang highlands, lime or cement stabilization converts compacted earth tracks into all-weather structural surfaces capable of supporting farm trucks and agricultural machinery year-round. The DCW 2.2's 1m/2m width flexibility is particularly valuable on narrow mountain access roads where the full 2,140 mm working width of the 2m setting may exceed the usable road surface width on the narrowest sections.
Industrial and Plantation Internal Roads
For plantation company internal roads, industrial zone service roads, and logistics center yard surfaces where the existing base material is suitable for stabilization, the DCW 2.2 + THOR ST combination provides the most cost-effective and fastest path from deteriorated surface to stabilized structural road base. These projects typically do not require formal engineering approval for the construction method, simplifying the procurement and mobilization process.
Temporary Road Construction and Site Preparation
Large construction sites, quarry haul roads, and temporary infrastructure projects where a stabilized working surface is needed rapidly and at low cost benefit from lime or cement in-place stabilization with the DCW 2.2 + THOR ST system. The stabilized surface can be trafficked within 24–48 hours of treatment (depending on binder type and curing conditions), providing a practical all-weather working surface without the cost and time of aggregate import and compacted base course construction.
Watanabe — Road Stabilization Equipment Since 1970
Why Brazil's Rural Road Experience Applies to Korea
Brazil operates one of the world's largest networks of unsurfaced rural roads — several million kilometers of agricultural access, farm-to-market, and village connector roads across conditions ranging from tropical clay through granite highlands and coastal sandy soils. The DCW 2.2 was designed and refined in this environment — precisely the conditions that Korean 농어촌도로 rehabilitation projects present. The operational parameters (binder types, application rates, working widths), equipment robustness requirements, and logistics conditions that shaped the DCW 2.2's design directly parallel Korean rural road project conditions.
Korea Local Stock and Technical Support
Korea Watanabe stocks the DCW 2.2 in Ansan-si, Gyeonggi-do, alongside the THOR ST for complete system delivery. Korean-language technical support covers system configuration (DCW 2.2 + THOR ST on the CVT tractor), application rate guidance for different soil and binder types, and electronic control system setup. We can provide reference binder application rates for typical Korean soil types as a starting point for project-specific laboratory confirmation.
Frequently Asked Questions — DCW 2.2
Can the DCW 2.2 be used without the THOR ST soil stabilizer?
Yes — the DCW 2.2 can operate as a standalone front-mounted binder spreader independently of the THOR ST. In this configuration, it distributes lime or cement as a pre-spreading pass before a stabilization machine (any brand) makes its mixing pass separately. However, the full operational efficiency of the DCW 2.2 is only realized when it works simultaneously with the rear-mounted THOR ST on the same tractor — the single-pass binder distribution + milling combination is the system's primary design purpose. Using the DCW 2.2 standalone adds a separate spreading pass to the project workflow, which is more efficient than manual spreading but less efficient than the combined single-pass operation.
What tractor is required to carry both DCW 2.2 and THOR ST simultaneously?
The combined configuration requires: (1) CVT tractor (mandatory for THOR ST operating speed range); (2) minimum 250 CV power (THOR ST PTO requirement); (3) front three-point hitch with minimum 1,300 Kg lifting capacity for DCW 2.2 at the front; (4) rear three-point hitch or drawbar for THOR ST at the rear; (5) adequate tractor ballasting for front-rear weight distribution with both implements attached. Total system weight on the tractor is significant — confirm with your tractor manufacturer or dealer that the front hitch capacity and tractor frame loading are within the tractor's rated specification for combined front and rear implement attachment. European CVT tractors in the 250–350 CV range (Fendt, New Holland, CLAAS, John Deere IVT) typically accommodate this configuration.
What is the "mandatory weight" of 1,300 Kg?
The 1,300 Kg mandatory weight is the minimum front-axle load required when the DCW 2.2 is front-mounted and loaded with binder. This front weight is necessary to maintain tractor steering control and prevent front-axle lift when the heavy rear-mounted THOR ST (5,300 Kg) is also attached and working. The 1,300 Kg front ballast is typically achieved by a combination of the DCW 2.2's own weight (hopper weight + machine weight) and any additional front ballast weights on the tractor. Confirm the tractor's specific front axle load with both implements attached before commissioning the combined system.
How is the electronic binder application rate calibrated?
The DCW 2.2 control system is calibrated during initial setup by running the spreader at a measured speed over a test area and collecting and weighing the output — the calibration factor is then entered into the cab display. Once calibrated, the system automatically adjusts the roller speed to maintain the target application rate as the tractor's forward speed varies. A re-calibration check is recommended when changing binder type (lime vs. cement, different grades) since particle density and flow characteristics differ between binder types and can affect the relationship between roller speed and actual delivery rate.
What are typical binder application rates for Korean rural road stabilization?
Binder application rates must be determined by laboratory analysis of the specific road material to be stabilized — there is no universal rate. As general guidance only (not a substitute for laboratory testing): cement stabilization of granular road base materials typical of Korean highland zones typically requires 4–8% cement by dry weight of soil (approximately 7–15 kg/m² at 100 mm depth depending on soil density); lime stabilization of clay-bearing soils in coastal Korean zones typically requires 3–6% lime by dry weight. The definitive application rate for any project must be confirmed by Proctor compaction and UCS testing of site-specific soil + binder mixtures before project commencement. Korea Watanabe can recommend local geotechnical laboratories for soil stabilization design testing.
What is the hopper capacity and how often does it need to be refilled?
The DCW 2.2 hopper capacity and refill frequency depend on the binder application rate and working speed. Contact us with your project parameters (binder type, target application rate, road width, and working speed) and we will provide the specific hopper capacity and estimated refill interval for your project configuration. Planning the binder supply logistics — bulk delivery schedule, on-site storage, and loading arrangement — is an important part of project preparation for soil stabilization contracts.
Is there a risk of lime/cement dust affecting nearby residents or crops?
Lime and cement powder spreaders generate airborne dust during operation — a real concern for nearby residents, crops, and water bodies. The DCW 2.2 is designed to minimize dust by distributing binder at low height through the roller mechanism rather than broadcasting from height. In addition, the THOR ST's water injection system immediately behind the DCW 2.2 introduces moisture that suppresses dust from the freshly spread binder within seconds of application. For projects near sensitive receptors (residences, orchards, water bodies), work during low-wind conditions and inform nearby residents in advance. The Korean government's Construction Noise and Dust Management Guidelines (건설공사 소음·진동 관리기준) provide the regulatory framework for dust management on construction projects.
What maintenance does the DCW 2.2 require after each project?
After each project: completely empty the hopper — residual lime or cement absorbs moisture and hardens, clogging the roller mechanism. Clean the interior of the hopper, the rollers, and the distribution mechanism thoroughly with compressed air and brushing — do not use water on the interior components (cement + water = setting reaction). Inspect the roller surfaces for wear and any deposits. Check the electronic control display and cable connections. Lubricate all grease points per the maintenance schedule. The most common maintenance issue on spreader equipment is residual binder hardening in the distribution mechanism from incomplete post-use cleaning — avoid this by cleaning thoroughly at the end of each working day and before any extended storage period.
Customer Reviews
Yoo Sung-jin — Rural Road Contractor, Jecheon, North Chungcheong (2025)
★★★★★
"Running the DCW 2.2 + THOR ST combined system on the Jecheon county road contract. The electronic cab control on the DCW 2.2 is genuinely useful — I can maintain the target cement dosage rate precisely even when I have to slow down for road furniture or narrow sections. The uniformity of the binder distribution compared to the bag-spread we used to do is obvious in the finished base strength results."
Kim Hyeon-taek — Road Contractor, Wonju, Gangwon-do (2024–2025)
★★★★★
"The 1m/2m width switching was unexpected but very valuable in practice. On one road section in Gangwon, we had a drainage channel on one side that restricted the usable road width. 1m mode let us treat the full road in two passes — left half, then right half — without the DCW 2.2 spreading outside the road area. The THOR ST was full width both times but the binder coverage was exactly where it needed to be."
Choi Wan-su — Civil Engineering Contractor, Naju, South Jeolla (2025)
★★★★★
"Lime stabilization on South Jeolla clay soils — the DCW 2.2 electronic control let us hit the 4.5% lime dosage rate consistently across the full project length. Previous projects using bag-spread had variable quality because manual spreading inevitably produces uneven coverage. The supervised quality control testing on this project accepted all sections on first pass."
Park Dong-su — Forestry Contractor, Hamyang-gun, South Gyeongsang (2025)
★★★★★
"Timber road stabilization — the DCW 2.2 + THOR ST single-pass operation means we complete a 200m forest road section per day with one tractor operator. The alternative with bag-spread would need a separate crew for spreading and a separate machine for the milling pass. The labour cost saving is significant on remote forest road projects where getting additional workers to site is difficult."
Jeong Hyun-jo — County Road Engineer, Boryeong-si, South Chungcheong (2025)
★★★★★
"As the supervising engineer on the Boryeong stabilization project, the DCW 2.2's electronic application records were what we needed for the quality assurance documentation. The dosage log from the cab control system showed consistent binder application rate across the full 6 km project length. This kind of verifiable quality record is increasingly required on government road contracts and the DCW 2.2 provides it automatically."
Lee Sang-bum — Plantation Manager, Yeongam-gun, South Jeolla (2024)
★★★★★
"Internal plantation road stabilization — the DCW 2.2 + THOR ST system from Korea Watanabe was the right choice for our internal road network. The Korea Watanabe team provided application rate guidance before we started based on our soil type, which avoided the trial-and-error dosage adjustment that can waste binder and delay results. Maintenance advice after the first project was also practical and useful."
Discuss Your Soil Stabilization Project
Tell us your road length, soil type, project specification, and whether lime or cement treatment is planned — we provide application rate guidance and full system configuration recommendation. DCW 2.2 and THOR ST available from rock-crusher-tractor.com, Ansan-si, Gyeonggi-do.
Informasi Tambahan
| Editor | Cxm |
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