BOF Steel Slag Aggregate for Road Base, Asphalt, and Heavy-Duty Infrastructure

BOF steel slag aggregate is a high-density, durable material widely used in road base layers, asphalt mixtures, railway ballast, drainage layers, and load-bearing civil works. Graded BOF slag with controlled particle size and consistent quality helps achieve stable pavement performance, high abrasion resistance, and long service life in demanding environments. We work with international buyers seeking processed steel slag and graded steel slag that meets infrastructure specifications and performance expectations. Material can be selected based on size range, density, and technical suitability for high-load pavements, sub-base construction, and industrial hardstand areas. Documentation, inspection coordination, and export handling are managed to support reliable international shipments and compliance with buyer requirements across different regions. The product may be supplied as BOF slag aggregate, BOF slag chips, or BOF slag granules, depending on project requirements, and is commonly used as road base slag, asphalt slag aggregate, steel slag ballast, or construction steel slag in infrastructure and industrial environments.

Technical Specifications

Basic Oxygen Furnace Slag

Typical technical parameters are aligned with internationally recognized construction and infrastructure practices. Actual specifications are confirmed per shipment and buyer requirements.

Key characteristics typically considered by buyers include:

• Controlled particle size distribution

• Dense structure suitable for load bearing layers

• High abrasion resistance for traffic and industrial loads

• Stable volumetric behavior when properly processed

• Compatibility with bituminous and cementitious systems

Technical suitability may include:

• Low free lime BOF steel slag grades for improved volumetric stability

• BOF slag with controlled particle size for pavement engineering

• BOF slag with stable volumetric properties for base and sub-base works

• BOF slag with controlled moisture content where handling or blending is required

Grades may be selected to meet requirements such as:

• Steel slag aggregate meeting road specifications

• High abrasion resistance steel slag aggregate

• Uniform quality BOF steel slag aggregate

Size Range and Grading

We supply coarse steel slag, graded BOF slag, and dense mineral aggregate in size ranges typically used in infrastructure projects, including:

• Granular sub-base fractions

• Base course aggregates

• Asphalt and concrete aggregates

• Drainage layer materials

• Embankment and stabilization materials

Material may be supplied as:

• Air cooled BOF slag

• Crushed steel slag for sub base

• Processed BOF slag for granular sub base

• Coarse BOF slag for foundation layers

Custom grading can be arranged based on project requirements and technical drawings provided by buyers.

Quality and Inspection

Quality control focuses on consistency, grading accuracy, and technical suitability for infrastructure use.

Inspection practices may include:

• Particle size distribution verification

• Visual inspection for consistency

• Moisture level checks

• Loading supervision prior to shipment

Where required, third-party inspection agencies can verify:

• Grading

• Load weight

• Sampling and laboratory testing

This ensures buyers receive steel slag aggregate with consistent grading and predictable handling characteristics.

Applications and Industry Use

BOF slag for heavy duty concrete applications and infrastructure works is widely used in:

Road and Infrastructure

• BOF steel slag aggregate for road base

• Steel slag aggregate for rigid pavement base

• Dense BOF slag for base course

• Steel slag aggregate for high durability layers

• BOF slag suitable for asphalt concrete

• Steel slag aggregate for asphalt mixtures

• BOF slag compatible with bituminous mixes

• High strength BOF slag road aggregate

Transport and Heavy Load Areas

• Steel slag aggregate for railway ballast

• BOF slag for high load pavements

• High density BOF slag for heavy traffic

• BOF steel slag for load bearing layers

Industrial and Port Infrastructure

• Steel slag aggregate for port and yard paving

• BOF slag for industrial hardstand areas

• Steel slag aggregate for industrial flooring

Civil Engineering and Ground Works

• BOF slag suitable for embankment construction

• BOF slag suitable for drainage layers

• BOF slag suitable for mechanical stabilization

• Engineered BOF slag for infrastructure projects

Industries typically using this material include:

• Highway and road contractors

• Civil engineering companies

• Port authorities

• Industrial infrastructure developers

• Rail infrastructure contractors

• Asphalt and pavement contractors

Performance Expectations

When properly selected and graded, metallurgical slag aggregate such as BOF slag offers:

• High load distribution capability

• Resistance to abrasion under heavy traffic

• Stability in base and sub-base layers

• Long service life in heavy-duty applications

Performance depends on engineering design, compaction methods, and compliance with local standards. Buyers are encouraged to verify compatibility with project specifications.

Packaging and Logistics

For international transport, industrial slag aggregate and BOF slag aggregate are typically shipped in:

• Bulk vessel shipments

• Jumbo bags (where required)

• Containerized bulk loads for smaller volumes

Handling practices include:

• Moisture control prior to loading

• Clean loading areas to prevent contamination

• Weight and draft verification at port

Shipment readiness is coordinated with port operators to ensure efficient loading and documentation.

Storage and Handling Considerations

Recommended practices for buyers:

• Store on compacted ground or paved surfaces

• Avoid mixing with soil or debris

• Protect from excessive moisture if grading precision is critical

• Use mechanical handling equipment suitable for heavy duty road aggregate and industrial slag aggregate

Export Process

As an Indian exporter, we coordinate shipments from major ports and manage all commercial and logistics steps:

1. Technical discussion and specification confirmation

2. Grading and quantity planning

3. Sampling or inspection if required

4. Commercial quotation under agreed Incoterms

5. Vessel or container booking

6. Port handling and customs clearance

7. Shipment documentation and dispatch

We work regularly with international buyers and understand procurement timelines, port operations, and bulk cargo logistics.

Documentation and Compliance

Typical export documentation may include:

• Commercial Invoice

• Packing List

• Certificate of Origin

• Bill of Lading

• Weight and Quality Certificates (if required)

The appropriate HS code is confirmed based on grading and application classification. Compliance with destination country import requirements is reviewed in advance to avoid clearance delays.

Buyer Support

We support procurement and technical teams by providing:

• Grading details and size distribution information

• Shipment planning assistance

• Port and transit guidance

• Inspection coordination

• Export compliance support

Our role as an exporter includes clear communication, realistic lead times, and structured documentation to support international sourcing programs.

Contact for International Buyers

Procurement teams, contractors, and infrastructure developers may request:

• Technical specifications

• Grading options and size ranges

• Shipment availability

• Port loading details

• Documentation samples

Enquiries with project requirements and destination port details help us provide accurate commercial and technical information.

FAQ

Q1. What is BOF steel slag?

BOF steel slag, also known as basic oxygen furnace slag or LD slag, is a dense mineral aggregate generated during steel refining. After processing and grading, it is widely used in infrastructure, road construction, rail ballast, and industrial ground works.

Q2. What forms of BOF slag are available for export?

Material can be supplied as:

• Crushed steel slag

• Granular steel slag

• Graded steel slag

• Air-cooled BOF slag

• BOF slag aggregate in specified size ranges

The form depends on application and engineering requirements.

Q3. What size ranges are typically supplied?

Common export size ranges include:

• Granular sub-base fractions

• Base course aggregates

• Coarse aggregates for pavement and concrete

• Drainage layer material

Custom grading can be arranged based on project specifications.

Q4. Can grading be customized for specific projects?

Yes. Grading and particle size distribution can be adjusted to meet:

• Road base specifications

• Asphalt mix requirements

• Railway ballast standards

• Industrial flooring and hardstand applications

Buyers typically provide required grading charts or standards.

Q5. What industries commonly use BOF steel slag?

Industries include:

• Road and highway construction

• Rail infrastructure

• Ports and logistics yards

• Industrial infrastructure projects

• Civil engineering contractors

• Asphalt and pavement contractors

Q6. What are the main applications of BOF slag?

Typical uses include:

• Road base and sub-base layers

• Asphalt and bituminous mixtures

• Railway ballast

• Embankments and drainage layers

• Industrial yard paving

• Heavy load pavements

Q7. What performance characteristics do buyers typically expect?

Buyers generally look for:

• High density and load-bearing capacity

• Abrasion resistance

• Stable volumetric behavior when properly processed

• Compatibility with pavement and stabilization systems

Actual performance depends on engineering design and installation methods.

Q8. Is low free lime BOF slag available?

Where required, material with controlled free lime content and stable volumetric properties can be supplied. Technical details are confirmed during order finalization.

Q9. How is quality controlled before export?

Quality practices may include:

• Particle size analysis

• Visual inspection and sampling

• Moisture checks

• Loading supervision

Third-party inspection can be arranged if requested by the buyer.

Q10. Can independent inspection agencies be appointed?

Yes. International inspection agencies can verify:

• Grading and size distribution

• Weight and loading

• Sampling and laboratory testing

This is commonly requested for infrastructure and government projects.

Q11. What packaging options are available?

BOF slag is typically shipped in:

• Bulk vessel shipments for large volumes

• Jumbo bags for container shipments

• Loose bulk in containers for smaller consignments

The most economical method depends on quantity and destination.

Q12. How is material prepared for shipment?

Before shipment:

• Material is staged and checked for grading consistency

• Moisture levels are monitored where necessary

• Loading areas are kept clean to prevent contamination

• Weight verification is conducted at port

Q13. What storage practices are recommended for buyers?

Recommended practices:

• Store on paved or compacted surfaces

• Keep separate from soil or debris

• Use mechanical handling equipment suitable for heavy aggregates

• Protect from excessive moisture when grading precision is important

Q14. What Incoterms can be offered?

Commonly used Incoterms include:

• FOB (Free on Board)

• CFR (Cost and Freight)

• CIF (Cost, Insurance, Freight)

The appropriate term depends on buyer preference and destination.

Q15. Which ports are typically used for export?

Shipments are arranged from major Indian ports depending on:

• Material location

• Vessel availability

• Destination country

Port options are discussed during quotation.

Q16. What documents are provided with export shipments?

Typical documentation includes:

• Commercial Invoice

• Packing List

• Bill of Lading

• Certificate of Origin

• Weight or inspection certificates if required

Additional documents can be arranged depending on destination regulations.

Q17. What HS code is used for BOF slag?

The HS code depends on grading, processing level, and destination country classification. The correct code is confirmed during the export documentation stage.

Q18. What minimum order quantities are typical?

Minimum order quantities depend on:

• Shipment method (bulk vessel or container)

• Grading requirements

• Port handling constraints

Bulk shipments are generally more economical for large infrastructure projects.

Q19. How long does it take to arrange a shipment?

Lead time depends on:

• Quantity and grading requirements

• Port scheduling

• Vessel or container availability

• Inspection requirements

Typical timelines are confirmed after technical and commercial discussions.

Q20. Can samples be provided?

Yes, representative samples may be arranged for:

• Laboratory testing

• Mix design trials

• Engineering evaluation

Sample logistics depend on size and destination.

Q21. Is technical information provided to buyers?

Yes. Buyers may request:

• Size distribution data

• Typical material characteristics

• Application guidance based on industry practices

This helps procurement and engineering teams evaluate suitability.

Q22. Is BOF slag suitable for asphalt and pavement works?

Yes, properly processed and graded BOF slag is commonly used in:

• Asphalt mixtures

• Pavement base layers

• High-load road structures

Compatibility depends on local engineering standards and mix design.

Q23. Can shipments be arranged for government or infrastructure tenders?

Yes. Documentation, inspection, and compliance procedures can be coordinated to meet tender or project requirements.

Q24. How are international buyers supported during procurement?

Support typically includes:

• Specification review

• Shipment planning

• Port and logistics coordination

• Documentation guidance

• Inspection coordination

This helps reduce risks in cross-border procurement.

Q25. How can buyers request specifications or shipment details?

Buyers may share:

• Required size range or grading

• Application or project type

• Estimated quantity

• Destination port

This information allows accurate technical and commercial planning.

Q26. Which regions or countries typically import BOF steel slag from India?

Processed BOF steel slag is used internationally in road construction, rail infrastructure, port development, and heavy-duty industrial paving. Shipments from India are arranged for infrastructure contractors, engineering firms, and aggregate distributors in various regions, depending on project demand and freight viability.

Exports are commonly handled for buyers in:

• South and Southeast Asia – including Bangladesh, Sri Lanka, Vietnam, Indonesia, and Thailand, where large road and port projects require durable aggregates
• Middle East – including United Arab Emirates, Saudi Arabia, and Oman, particularly for infrastructure and industrial yard construction
• Africa – including Kenya, Tanzania, Egypt, and South Africa, where steel slag aggregates are used in road base and civil works
• Eastern and Southern Europe – selected markets where alternative aggregates are used in pavement and engineering applications

Actual shipment destinations depend on project specifications, logistics planning, and local engineering standards. Compliance and documentation are prepared in accordance with the importing country’s regulations and project requirements.