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Rapid Chloride Migration Test (RCMT).

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The Scientific Edge in Concrete Durability Assessment

The Rapid Chloride Migration Test (RCMT) is an essential durability test for concrete, particularly when evaluating its resistance to chloride-induced corrosion. While it shares the goal of the RCPT (Rapid Chloride Penetration Test) to assess concrete's chloride ingress resistance, it is often preferred in certain situations because of its more direct and scientifically sound approach. The RCMT provides a direct calculation of the chloride migration coefficient (DRCMT​). This coefficient is a fundamental parameter used in service life models to predict how quickly chloride ions will penetrate the concrete cover over time. This makes the RCMT a more robust and theoretically sound tool for performance-based design and service life prediction.

Why RCMTMatters.

Provides true durability insight

RCMT directly measures chloride ion movement in concrete, giving a scientific understanding of how effectively it can resist corrosion over time.

Enables service-life prediction

The test produces the DRCMT coefficient — a key parameter used in models that estimate how long it takes for chloride ions to reach the steel reinforcement.

Improves material optimization

Helps engineers compare mixes, supplementary cementitious materials, or admixtures to achieve superior chloride resistance and long-term durability.

Essential for critical structures

Ideal for marine, coastal, bridge, tunnel, and precast applications where chloride exposure significantly influences structural life and performance.

NDT TESTING

GL Advantages.

  • Accredited facility: NABL-grade laboratory with traceable calibration and strict QA systems.

  • Standards compliance: Tests performed to ASTM C1202 (Rapid Chloride Permeability Test) and applicable IS/EN methods.

  • Experienced analysts: Concrete technologists who interpret results and recommend mitigation.

  • Fast, reliable reporting: Clear reports with test data, graphs, comparative benchmarks, and practical recommendations.

  • Field + Lab capability: On-site sampling, specimen curing, and post-test consulting.

Global Lab Advantage.

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

The chloride migration coefficient (DRCMT) is the key output of this test. It defines the rate of chloride ion movement in square meters per second (m²/s). This value is crucial in service-life modeling software and durability design tools, helping designers determine

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Rapid Chloride Migration 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.