Base Layer & Subgrade Preparation
The Foundation of Strong, Durable Roads
Strong Foundations for Reliable Road Construction
Subgrade and base layer preparation form the core of every durable road. At Shreeyash Construction, we deliver engineered foundation works designed for maximum strength, long-term performance, and superior load-bearing capacity.
Our expert engineers ensure precise grading, leveling, moisture conditioning, and compaction, strictly following MoRTH & IRC standards. Whether it’s a highway, industrial road, township layout, or factory pavement — strong foundations begin here.
What is Subgrade Preparation?
Subgrade is the natural soil prepared to support the road layers above it. Its quality determines the entire road’s durability.
- Clearing & grubbing
- Excavation & soil filling
- Moisture conditioning (OMC)
- Compaction to required CBR
What is Base Layer Preparation?
Base layers (GSB & WMM) provide strength, load distribution and support for asphalt or concrete surfacing.
- Precise leveling & grade control
- Uniform layer thickness
- Compaction using vibratory rollers
- Surface quality testing
Materials & Technical Specifications
Materials Used in Base Construction
Granular Sub–Base (GSB)
Crushed aggregates, gravel, quarry dust — drainage-friendly and load-bearing.
Wet Mix Macadam (WMM)
Well-graded aggregates mixed with water & mechanically laid using pavers.
Technical Specifications
| Layer | Material | Thickness | Compaction Standard |
|---|---|---|---|
| Subgrade | Natural soil / fill | As per design | 97% MDD |
| GSB | Crushed aggregates | 150 – 200 mm | 98% MDD |
| WMM | Graded aggregates | 100 – 250 mm | 98% MDD (vibratory) |
| Tolerances | Level: ±10mm | Thickness: ±8mm | Evenness: ≤12mm |
Applications & Why Choose Shreeyash Construction?
Applications
Why Choose Shreeyash Construction?
- Specialized in GSB & WMM foundation works
- Use of modern graders, pavers & rollers
- Strict MoRTH & IRC compliance
- Accurate QC, density & level testing
- Timely execution with proven results