The Secret to Durable Roads
The durability of a road is determined by what's underneath the tarmac. Road subgrade preparation is the most critical phase of road construction.
1. Proper Soil Testing
Before any precision grading for drainage can begin, comprehensive soil testing is essential. Understanding the CBR (California Bearing Ratio) of the local soil allows engineers to design the appropriate sub-base thickness.
2. Moisture Content Control
Optimal moisture content is vital for effective compaction. Too much or too little water will prevent the soil from reaching its maximum dry density.
3. Quality Material Selection
Selecting the right materials for the sub-base and base layers is key to preventing future potholes and structural failure.
4. Precision Grading for Drainage
Modern motor graders are used to ensure precision grading for drainage, allowing water to flow off the road surface and preventing ponding, which is the primary cause of road failure.