Field & Lab CBR Testing
California Bearing Ratio (CBR) testing under soaked and unsoaked conditions for road subgrade design.
Service Overview & Scope
CBR testing by ATLES evaluates the shearing resistance of subgrade soil and sub-base materials to determine total pavement thickness requirements.
Engineering Purpose
To assess subgrade load capacity under saturated (soaked) subgrade conditions.
Key Civil Engineering Applications
Testing Methodology & Field Execution
Compaction of soil specimen into standard CBR mould at Optimum Moisture Content (OMC).
4-day soaking period to simulate worst-case monsoon saturation (for soaked CBR).
Penetration test on CBR load frame at constant strain rate of 1.25 mm/min.
Calculation of CBR value at 2.5mm and 5.0mm penetration depths.
Laboratory & Field Equipment
Engineering Significance
Directly governs flexible pavement design thickness and protects subgrade from shear deformation.
Deliverable Reports & Certificates
- CBR Load vs Penetration Graph
- Soaked & Unsoaked CBR Percentage Certificate
- Pavement Subgrade Class Recommendation
Inquire For Field & Lab CBR Testing
Request a quotation, schedule site testing, or sample pickup.