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Core Compressive Strength Test.

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In-situ Evaluation of Concrete Strength in Existing Structures

Core Compressive Strength Test is a semi-destructive method used to determine the actual compressive strength of hardened concrete in an existing structure. Unlike cube tests performed on cast concrete, this test evaluates concrete as it exists on site, accounting for workmanship, curing conditions, age, and in-service exposure. Concrete cores are extracted from structural elements such as foundation, slabs, beams, columns, or walls and tested under controlled laboratory conditions. The results provide direct, reliable evidence of in-situ concrete quality, making this test for structural assessment, and decision-making in existing or disputed works.

Why CCS Matters.

Direct Measurement of In-Situ Concrete Strength.

The Core Compressive Strength Test provides the most reliable assessment of concrete strength as it exists in the structure. Unlike cube tests or indirect NDT methods, core testing measures the actual strength of hardened concrete, accounting for quality of concrete, workmanship, curing conditions, compaction. This makes it the definitive method for determining actual compressive strength of the structural element to compare with the design criteria.

Structural Safety and Load-Carrying Verification.

Knowing the real compressive strength of concrete is essential for evaluating whether structural elements can safely support existing or proposed loads. Core test results are used to verify structural adequacy, identify under-strength zones, and prevent risks associated with over-stressing, excessive deflection, or potential failure.

Resolution of Quality, Compliance, and Dispute Issues

Core testing is critical when concrete quality is questioned due to missing, inconsistent, or disputed cube test results. It provides legally and technically defensible evidence of concrete compressive strength, often forming the basis for acceptance decisions, rectification measures, or forensic investigations in construction disputes.

Foundation for Repair, Retrofitting, and Life-Cycle Decisions.

Accurate knowledge of in-situ concrete strength is essential for designing repairs, strengthening measures, or structural modifications. Core test data enables engineers to design effective retrofitting schemes and plan maintenance strategies based on concrete member performance rather than assumptions.

NDT TESTING

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

Structural assessment of existing buildings, bridges, and industrial structures.
Verification of concrete strength where cube test results are unavailable or disputed.
Load rating and change-of-use evaluation for buildings and floors.
Condition assessment for repair, rehabilitation, and retrofitting works.
Quality investigation in cases of suspected poor workmanship or material issues.

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Core Compressive Strength Test

Core Compressive Strength Test

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On-Site Testing Across India

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.