Best GSB material Chennai
Best GSB Material in Chennai
Vignesh Aravind Transports supplies the best GSB material in Chennai for highways, layout roads, factory yards and parking areas. Our granular sub base is graded to MoRTH specifications, loaded from {{crusher/source}} and delivered in bulk by tipper lorry to your site.
Vignesh Aravind Transports is a reliable supplier of high-quality granular sub-base material for road and infrastructure work across Chennai and nearby industrial locations. We supply well-graded GSB for projects that require a stable, drainable and properly compacted layer below WMM, bituminous layers or concrete pavements.
Whether you are building a layout road, internal factory road, warehouse yard, parking area or highway package, the quality of the sub-base directly affects pavement performance. Our GSB material is selected, graded and supplied for dependable compaction, load distribution and drainage.
GSB Material Price in Chennai
GSB material price in Chennai depends on the grade required, source location, quantity, delivery distance, loading arrangement and project specifications. Contact us for a project-specific quotation and bulk transport rate.
| Grading | Per unit (100 cft) | Per cubic metre | Per {{6}}-unit lorry |
|---|---|---|---|
| GSB Grade {{I}} | ₹{{RATE}} | ₹{{RATE}} | ₹{{RATE}} |
| GSB Grade {{II}} | ₹{{RATE}} | ₹{{RATE}} | ₹{{RATE}} |
| GSB Grade {{III}} | ₹{{RATE}} | ₹{{RATE}} | ₹{{RATE}} |
For bulk road-work quantities and scheduled delivery, call 96776 19999 for a project rate.
What Is GSB (Granular Sub Base)?
GSB is a layer of graded crushed stone, gravel and fine material laid over the compacted subgrade of a road. It spreads the load from traffic, drains water out of the road structure and stops fine soil from moving up into the upper layers.
Granular Sub-Base is one of the most important layers in flexible pavement construction. It is placed between the prepared soil subgrade and the upper base course, such as Wet Mix Macadam (WMM). A properly constructed GSB layer helps create a stable platform for the layers above while reducing stress on the natural soil below.
GSB material may be made from crushed stone, crushed gravel, natural gravel, quarry aggregates or a combination of approved materials. The correct aggregate size distribution, commonly called gradation, is essential because it determines how well the material compacts, carries load and allows water to drain.
GSB Grading as per MoRTH
GSB supplied for road work should be selected according to the approved pavement design, project specification and required MoRTH grading. Close-graded GSB uses a controlled range of aggregate sizes and fines to form a dense, compactable layer. The values below are commonly used Grade I, Grade II and Grade III close-graded ranges.
GSB Gradation Table
| IS sieve size (mm) | Grade I % passing | Grade II % passing | Grade III % passing |
|---|---|---|---|
| 75.0 | 100 | — | — |
| 53.0 | 80–100 | 100 | 100 |
| 26.5 | 55–90 | 70–100 | 55–75 |
| 9.5 | 35–65 | 50–80 | 10–30 |
| 4.75 | 25–55 | 40–65 | — |
| 2.36 | 20–40 | 30–50 | — |
| 0.425 | 10–25 | 15–30 | — |
| 0.075 | <10 | <10 | — |
Note: Final grading, physical properties and acceptance criteria must always follow the approved project specification, pavement design and applicable MoRTH revision.
Close-Graded vs Coarse-Graded GSB
Close-graded GSB has a wide spread of particle sizes and compacts to a dense layer. It is generally selected where a stable, well-compacted sub-base is required below the next pavement layer.
Coarse-graded GSB has fewer fines and drains faster, so it is used where drainage is the priority. The chosen material should match the engineer’s design, site soil condition, rainfall exposure, traffic loading and drainage requirement.
Uses of GSB Material
- National and state highway sub-base layers
- Layout roads and gated-community internal roads
- Factory, warehouse and logistics yards
- Parking areas and container yards
- Airport and port pavements
- Industrial access roads and heavy-vehicle circulation areas
- Site-development works before WMM, concrete or bituminous layers
GSB Layer Thickness and Laying Method
GSB should be laid only after the subgrade has been brought to the required line, level, camber and compaction. Good workmanship during spreading, watering and rolling is necessary to obtain a uniform and stable road layer.
- Prepare and compact the subgrade to the required line, level and density.
- Spread GSB with a grader or paver in layers of {{150 to 200 mm}} loose thickness.
- Add water to reach the optimum moisture content required for compaction.
- Compact the layer with a vibratory roller to the specified density.
- Check level, thickness, camber and density before laying WMM or the next pavement course.
Typical GSB thickness for layout roads is {{150 to 200 mm}} and for highways {{200 to 300 mm}}, as per the pavement design. Thickness should not be chosen by rule of thumb alone: it must be finalised by the project engineer based on subgrade strength, expected traffic, drainage and the proposed pavement composition.
GSB vs WMM
| Feature | GSB | WMM |
|---|---|---|
| Full form | Granular Sub Base | Wet Mix Macadam |
| Position | Above subgrade | Above GSB |
| Mixing | Laid and watered at site | Mixed with water in a plant |
| Main job | Drainage and load spread | Strong base course |
| MoRTH section | 401 | 406 |
GSB and WMM serve different functions, but they work together in a pavement system. GSB forms the lower granular layer over the soil and assists with drainage and load distribution. WMM is the stronger, plant-mixed base layer placed over GSB before the final pavement layers.
See our WMM supplier in Chennai page for Wet Mix Macadam supply information.
Best GSB Material Suppliers in Chennai
Vignesh Aravind Transports supplies GSB material for road, industrial and infrastructure projects where consistent aggregate grading and dependable transport are important. We work with contractors, builders, developers, civil engineers and site teams that need material delivered according to their construction schedule.
Our material sourcing process focuses on suitable aggregate quality, workable gradation and timely bulk delivery. GSB must compact uniformly and perform as part of the complete pavement system; therefore, source selection and grading checks are important before dispatch for specification-driven work.
Understanding GSB Material
GSB, or Granular Sub-Base, is a construction material that forms the lower granular layer of roads, pavements and other hardstanding areas. It is placed over the compacted subgrade and below the base course. A properly graded GSB layer gives the pavement structure a stable platform and helps manage water within the pavement.
The material generally includes a blend of coarse aggregate, fine aggregate and controlled fine particles. Larger crushed-stone particles provide structural stability and load-carrying capacity. Fine aggregate fills part of the void space between larger particles, improving interlock and compaction. The proportion of each size is controlled through the specified gradation.
Functions of GSB
- Supports and reinforces the pavement structure
- Spreads wheel loads over a wider area of subgrade
- Reduces stress transmitted to the natural soil layer
- Provides drainage within the pavement structure
- Helps reduce the risk of rutting and deformation
- Provides a working platform for the construction of upper pavement layers
What Is GSB Made Of?
The exact ingredients in GSB can vary with the approved source, regional availability and engineering specification. In general, GSB is composed of coarse aggregates, fine aggregates and filler-sized particles. Crushed stone, crushed gravel, natural gravel and approved quarry products are commonly used to produce the required grading.
Coarse aggregate gives the layer strength and resistance to load. Fine aggregate improves packing and helps produce a dense compacted layer. Fine particles must remain within the permissible limit because too many fines can reduce drainage and affect the long-term performance of the pavement.
For project work, the material should be checked against the specified gradation and physical requirements rather than selected only on visual appearance. Proper testing helps confirm the material’s suitability for density, moisture, strength and pavement use.
Best GSB Material Dealers in Chennai: Supply Capacity
We can supply up to {{X}} loads per day for road projects, with scheduled dispatch and a site coordinator. As GSB material dealers in Chennai, we provide GST invoices, delivery challans and grading reports for each lot.
For large projects, planned dispatch is important to prevent delays in spreading and rolling operations. Our team can coordinate lorry movement based on site unloading space, daily laying target, approved working hours and material requirement.
Why Choose Vignesh Aravind Transports?
Vignesh Aravind Transports supports Chennai construction projects with dependable aggregate supply and transport coordination. We understand that a road layer is only as reliable as its material quality, gradation control, delivery planning and site execution.
- Bulk GSB supply for road, yard and infrastructure works
- Material sourced for approved grading requirements
- Tipper-lorry delivery to project locations
- Scheduled dispatch for ongoing site operations
- GST invoices and delivery challans
- Grading reports available on request
- Related aggregate materials for complete site requirements
We also supply construction aggregates and related earth materials for civil works. Explore our blue metal suppliers in Chennai page, our gravel supply page and our hill earth soil supply page.
Delivery Areas
We deliver GSB material to Chennai, OMR, ECR, GST Road, Oragadam, Sriperumbudur, Padappai, Chengalpattu, Kanchipuram and Tiruvallur.
Delivery availability, lorry capacity and final transport charges depend on the material source, order volume, road access, unloading conditions and project location. Share your site location and required quantity to receive an accurate quotation.
GSB FAQs
Q1. What is GSB material?
A. GSB, or Granular Sub-Base, is a graded mix of crushed stone, gravel and fines laid above the subgrade of a road. It helps spread load, create a stable platform and drain water from the pavement structure.
Q2. What is the GSB rate in Chennai?
A. GSB in Chennai costs ₹{{RATE}} per unit and ₹{{RATE}} per cubic metre, depending on grading, quantity, source and delivery distance. Call 96776 19999 for a project rate.
Q3. Does your GSB meet MoRTH grading?
A. Yes. Our GSB is supplied to MoRTH Section 401 grading {{I / II / III}} as required for the project. Grading reports are available on request.
Q4. What thickness of GSB is needed for a road?
A. Layout roads usually use {{150 to 200 mm}} of GSB and highways {{200 to 300 mm}}, as per the pavement design. The final thickness should be confirmed by the project engineer based on traffic load, soil condition and pavement design.
Q5. What is the difference between GSB and WMM?
A. GSB is the sub-base laid above the soil for drainage and load spread. WMM is the base course laid above GSB and mixed with water in a plant to provide a stronger, more uniform pavement layer.
Q6. Can GSB be used for parking areas and factory yards?
A. Yes. GSB is commonly used below WMM, concrete or paving layers in parking areas, industrial yards, warehouse approaches and container-handling zones. The required thickness and pavement layers should be designed for the expected vehicle loads.
Q7. How is GSB compacted?
A. GSB is spread in approved layer thicknesses, watered to the required moisture condition and compacted with suitable vibratory rollers. Level, camber, thickness and density should be checked before the next course is placed.