Testing & QC
NABL Accreditation
// Definition
Accreditation by the National Accreditation Board for Testing and Calibration Laboratories. NABL-accredited cube testing is mandatory for many large projects in India.
NABL certifies that a lab follows ISO/IEC 17025 procedures. Look for NABL-accredited labs for third-party cube testing on critical structural work.
// Related Indian Standards
ISO/IEC 17025
// Cross-references
Cube Test (IS 516)
The standard compressive strength test for concrete. 150 mm cubes are cured in water at 27±2°C and crushed at 7 and 28 days.
Acceptance Criteria (IS 456)
The statistical criteria in IS 456 Clause 16 for accepting concrete based on cube test results — both individual and group means.
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