Base Layer & Subgrade Preparation
Strong Foundations for Durable Roads and Pavements
Shreeyash Construction provides expert services in base layer and subgrade preparation, an essential step in road building, industrial flooring, and pavement construction. A properly prepared subgrade and base layer ensure uniform load distribution, long-term durability, and resistance to settlement or cracking. Our team uses advanced equipment and adheres to MORTH guidelines for precise grading, compaction, and stabilization.
What is Subgrade Preparation?
- Clearing & Grubbing – Removal of vegetation, roots, and debris
- Soil Excavation & Filling – Achieving required levels and uniformity
- Moisture Conditioning – Adjusting soil to optimum moisture content
- Compaction – Ensuring proper density and CBR for durability
Base Layer Preparation
On top of the subgrade, a base layer is laid to provide added strength and support for asphalt or concrete surfacing. This typically includes GSB or WMM layers placed with precision.
Granular Sub-Base (GSB)
Crushed stone, gravel, or quarry dust providing a stable base.
Wet Mix Macadam (WMM)
Graded aggregates mixed with water and compacted for uniform support.
Technical Specifications – Subgrade & Base Layer
| Layer | Material | Thickness | Compaction Standard |
|---|---|---|---|
| Subgrade | Natural soil / compacted fill | As per design level | 97% of MDD (Modified Proctor) |
| GSB | Crushed aggregates (63mm to fines) | 150mm – 200mm per layer | 98% of MDD |
| WMM | Graded aggregates (20mm down to fines) | 100mm – 250mm per layer | 98% density with vibratory compaction |
| Tolerances | Level ±10mm | Thickness ±8mm | Surface evenness ≤12mm |
Applications
Why Shreeyash Construction?
- Expertise in GSB & WMM laying with strict quality control
- Modern equipment: graders, paver finishers, vibratory rollers
- Compliance with IRC & MORTH specifications
- Proven track record in road and infrastructure projects
- Timely project execution with durable results