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Sinotruk HOWO 20m3 asphalt and gravel synchronous sealing truck in Nigeria with asphalt tank and stone silo

Rear view of the HOWO chip sealer showing 32 nozzles and 16-way material gate

Cab interior with control panel for asphalt spray and gravel spreader operation

Asphalt Synchronous Chip Sealer Truck

Sinotruk Howo 20m3 Asphalt and Gravel Synchronous Sealing Truck Nigeria

Name: Sinotruk Howo 20m3 Asphalt and Gravel Synchronous Sealing Truck Nigeria
Brand: Sinotruk HOWO

The Sinotruk HOWO 20m3 Asphalt and Gravel Synchronous Sealing Truck is designed for road surface maintenance and chip sealing operations in tropical and semi-arid climates. It applies asphalt binder and spreads crushed stone simultaneously, ensuring full contact between the two materials for optimal adhesion. Built on a HOWO chassis with a 371 HP engine, it operates in regions with high ambient temperatures and poor road infrastructure, such as Nigeria, where road rehabilitation is ongoing across rural and urban networks. The system enables continuous, high-speed sealing without stopping to reload aggregate.

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Key Benefits

Simultaneous asphalt spraying and gravel spreading ensures maximum bonding between binder and aggregate
8m3 asphalt tank and 12m3 stone silo allow for extended working range between refills
Adjustable spray width from 2m to 6m enables precise coverage on narrow roads and large highway sections
Computer-controlled 16-way material gate ensures even gravel distribution across the full width
Triple gear pump and proportional valve maintain consistent asphalt flow at varying speeds
Gravity-fed stone spreading eliminates mechanical wear and reduces maintenance downtime
Two diesel burners heat the asphalt to maintain viscosity during long operations
Full power PTO allows uninterrupted operation even at low engine RPM
Cabin-mounted control system enables full operation from the driver’s seat
Insulated tank with 50mm rock wool layer maintains asphalt temperature within 2°C per hour

Buyer Profile

Who It Is for

National and state road authorities responsible for rural and urban road maintenance
Contractors bidding on public works tenders for road rehabilitation and sealing
Municipal engineering departments managing local road networks in tropical climates
Private road maintenance companies operating in Africa and Southeast Asia
Government agencies funding infrastructure projects in emerging markets
Transport departments in countries with high road wear due to heavy traffic and poor drainage

Operating Problems

Problems It Solves

Manual chip sealing requires multiple passes and stops, increasing project time and cost
Inconsistent asphalt temperature leads to poor adhesion and premature failure of the seal
Separate spraying and spreading units increase equipment complexity and maintenance needs
Lack of temperature control causes asphalt to cool too quickly in hot climates
Short working range between refills forces frequent stops and reduces productivity
Uncontrolled gravel distribution results in uneven coverage and wasted material

Where It Works

Application Scenarios

Road rehabilitation projects in Nigeria with unpaved or deteriorating asphalt surfaces
Maintenance of rural feeder roads in sub-Saharan Africa with limited access to centralized paving plants
Highway resurfacing in regions with high ambient temperatures where asphalt viscosity must be controlled
Contractor fleets operating under government road maintenance tenders in developing countries
Emergency sealing of potholes and surface cracks to prevent further degradation during rainy seasons
Long-distance chip sealing operations on national routes where refueling and reloading are infrequent

Engineering

Technical Features

HOWO truck chassis with 371 HP MC 09.35-60 engine, China VI emission standard
8m3 asphalt tank with 50mm rock wool insulation and 1mm stainless steel outer layer
12m3 stone silo with gravity flow discharge and 16-way computer-controlled material gate
Triple gear pump CPC 4-50-20-16 for consistent asphalt delivery at 950 L/min
Proportional valve EFBG-03-160-HF adjusts asphalt flow based on vehicle speed
Two Riyadh diesel burners (200,000 kcal/hour) heat the asphalt through a heat transfer system
Heat transfer oil pump RY 25-25-160 with 2.2 kW motor maintains consistent temperature
32 nozzles with individual computer control allow precise spray pattern adjustment
Spray width adjustable from 2m to 6m with real-time feedback in the cab
Full power PTO drives the asphalt and gravel systems without engine load reduction
Cabin and post-platform dual control systems ensure operational reliability
Automatic blowing device clears asphalt residue from the tank outlet

Specifications

Technical Data


Model	Sinotruk HOWO 20m3 Asphalt and Gravel Synchronous Sealing Truck
Gearbox	Manual 10-speed
Asphalt Tank Capacity	8 m³
Stone Silo Capacity	12 m³
Spray Width	2 to 6 m adjustable
Asphalt Pump Flow	950 L/min
Control Mode	1 nozzle per control
Heating System	Two Riyadh diesel burners, 200,000 kcal/hour
Heat Transfer Oil Pump	RY 25-25-160
PTO Type	Full power PTO
Tank Insulation	50 mm rock wool
Tank Material	1 mm stainless steel outer layer
Overall Size	10500 x 2500 x 3400 mm
Lead Time	20 days
Shipping Port	China main port
Payment	T/T
Control System	C, dual cab and platform

Build Materials

Materials

1 mm thick stainless steel outer layer for asphalt tank and stone silo
50 mm rock wool insulation in asphalt tank walls
Galvanized steel frame for structural support
Aluminium alloy components for control panels and access doors
Stainless steel piping for asphalt delivery system
High-temperature resistant rubber seals on all joints and access points

How It Is Built

Manufacturing Process

Chassis is received from Sinotruk and inspected for frame alignment and wheelbase
Asphalt tank and stone silo are fabricated from 1 mm stainless steel and welded with full penetration joints
Insulation layer of 50 mm rock wool is installed and sealed to prevent heat loss
Triple gear pump and proportional valve are mounted and connected to the hydraulic system
32 nozzles are installed with individual control lines and tested for uniform spray
16-way computer-controlled material gate is assembled and calibrated for even gravel flow
Two diesel burners and heat transfer system are installed and tested for temperature stability
Control system is programmed and tested with real-time feedback from both cab and platform
Full system integration test is conducted with asphalt and gravel loaded
Final inspection includes temperature retention, spray width, and gravel distribution uniformity

Testing

Quality Control

All welds in the asphalt tank and stone silo are inspected using non-destructive testing
Pressure test conducted on the asphalt tank at 0.3 MPa for 30 minutes
Temperature retention test confirms asphalt stays within 2°C per hour
Every truck is 100 percent tested before delivery with photos and videos sent to buyer
Control system tested under simulated field conditions with full operational range
Heat transfer system tested for 2 hours at maximum burner output

Build to Order

Customization Options

Asphalt tank and stone silo capacities can be adjusted to match project needs
Tank colour and logo applied free of charge, including national or agency branding
Left or right hand drive chassis available to match local traffic rules
Control system can be upgraded to include GPS mapping and job data logging
Additional nozzles or material gates can be added for wider or more precise coverage
Manufacture to customer supplied technical drawings and specifications

Comparison

How It Compares With the Alternatives

Two-unit system (separate asphalt sprayer and gravel spreader)	Higher labor and fuel cost, more downtime for reloading, less precise timing between binder and aggregate application
Single tank chip sealer with mechanical spreader	Less consistent gravel distribution, higher wear on mechanical parts, no real-time spray control
Manual chip sealing with hand-held sprayer	Lower productivity, inconsistent application, higher risk of worker exposure to hot asphalt

Operating Notes

Use Guide

Confirm chassis drive configuration and hand of drive before ordering to match local regulations
Preheat the asphalt to 140–160°C before starting operations to ensure proper viscosity
Adjust spray width and flow rate based on vehicle speed using the proportional valve
Use the 16-way material gate to maintain even gravel coverage across the full width
Keep the heat transfer system running during idle periods to prevent asphalt cooling
Clean the nozzles and pump after each shift using the automatic blowing device

Buyer Questions About This Truck

What is the lead time for this chip sealer truck?

Generally 20 days after the advance payment is received. The exact date depends on chassis availability and equipment configuration.

Can the tank be made from carbon steel instead of stainless steel?

The standard tank is 1 mm stainless steel. Carbon steel is not used due to corrosion risk from hot asphalt and moisture.

What are your payment terms?

T/T with 30 percent deposit and 70 percent before delivery. We send photos and videos of the finished truck before you pay the balance.

Do you supply right hand drive?

Yes. The chassis is ordered in left or right hand drive to match your traffic regulations. Confirm this at order stage because it cannot be changed later.

How is the truck shipped?

By Ro-ro or bulk ship from a China main port. Trade terms can be EXW, FOB, CFR, or CIF.

What warranty and after sales support do you provide?

The whole vehicle is guaranteed for one year and core parts on some products for two years. Our overseas engineers make regular return visits and provide technical training and manuals before delivery.

Can the spray width be adjusted during operation?

Yes. The spray width is adjustable from 2m to 6m and can be changed in real time from the cab using the control system.