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Modulus of Subgrade (K-Value) Test.

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Evaluating Subgrade Stiffness and Load–Settlement Behaviour for Pavement Design

Modulus of Subgrade (K-Value) Test is carried out to determine the subgrade reaction modulus, which represents the relationship between applied pressure and resulting settlement of soil. This parameter is a critical input for the design of rigid pavements, raft foundations, industrial floors, and airport pavements, where accurate assessment of subgrade stiffness is essential.

Why (K-Value) TestMatters.

Determines Subgrade Stiffness for Pavement Design

The K-value defines how the subgrade reacts to applied loads, directly influencing slab thickness and reinforcement requirements in rigid pavements.

Supports Accurate Load–Settlement Analysis

Testing provides a direct measure of settlement behaviour under incremental loading, reducing uncertainties in pavement and foundation performance predictions.

Validates Soil Preparation and Compaction Quality

K-value testing helps confirm whether subgrade compaction and improvement measures meet design expectations before construction progresses.

Ensures Compliance With Design Codes and Specifications

The test supports compliance with IS standards, IRC guidelines, and project specifications, enabling acceptance by consultants and authorities.

GL Advantages.

Accredited Facility: NABL-accredited laboratory with traceable calibration and stringent Quality System procedures.

Compliance with Standards: Tests conducted in accordance with relevant IS/ASTM/RILEM/EN standards.

Experienced Personnel: Technologists and experts who interpret results and recommend mitigation strategies.

Rapid and Reliable Reporting: Valid reports that comply with relevant standards.

Testing Capabilities: Lab and on-site testing, along with post-test consulting services.

Global Lab Advantage.

Accredited facility.
Standards compliance.
Experienced analysts.
Fast, reliable reporting.
Field + Lab capability.

Applications

  • Design of rigid pavements and concrete roads
  • Airport runways, taxiways, and aprons
  • Industrial floors and heavy-duty pavements
  • Raft foundations and large-area foundations
  • Verification of treated or improved subgrade performance
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Modulus of Subgrade (K-Value) Test
Modulus of Subgrade (K-Value) Test

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Global Lab provides comprehensive testing for construction and engineering materials, including concrete, cement, steel, aggregates, bitumen, soil, tiles, paver blocks, and other civil and infrastructure materials. We also handle customized tests as per client or project specifications.

Yes. Our team is equipped with mobile testing facilities and field instruments for on-site sampling, inspection, and testing — ensuring quick and reliable results without disrupting your project timelines.