Jancy Labs — Trusted Non Destructive Testing Lab

Yes. Jancy Labs holds ISO/IEC 17025:2017 accreditation under Certificate No. TC-12176. Our NDT scope specifically covers UPV testing per IS 516 Part 5 Sec 1 and rebound hammer testing per IS 516 Part 5 Sec 4. You can verify this accreditation on the portal. This means our calibration, procedures, and report format meet the requirements your approving authority expects — making our reports acceptable to CPWD, TNHB, and PWD Tamil Nadu for structural assessments and audit submissions.

Jancy Labs conducts two core non destructive tests on concrete structures: the Ultrasonic Pulse Velocity (UPV) test per IS 516 Part 5 Sec 1, and the Rebound Hammer Test (Schmidt Hammer) per IS 516 Part 5 Sec 4. Both are available as on-site testing at your project location across Tamil Nadu, or as laboratory-based assessment at our Madurai NDT testing lab. Call us to discuss which test — or combination of both — best suits your structural assessment requirement.

The ultrasonic pulse velocity test (IS 516 Part 5 Sec 1) transmits ultrasonic pulses through a concrete element and measures the travel time between two transducers placed on opposite faces (direct transmission) or on the same face (indirect/surface transmission). The pulse velocity in metres per second correlates to concrete density and quality: above 4500 m/s is Excellent; 3500–4500 m/s is Good; 3000–3500 m/s is Medium; below 3000 m/s is Doubtful quality. The UPV test for concrete detects internal voids, cracks, and zones of poor compaction without causing any damage to the structure. It is one of the most reliable non destructive testing methods for assessing existing concrete elements.

The rebound hammer test — also called the Schmidt hammer test or Schmidt rebound hammer test (IS 516 Part 5 Sec 4) — uses a spring-loaded plunger to strike the concrete surface. The rebound index (R-value) of the plunger correlates with the surface hardness of the concrete, which in turn gives an estimate of the relative compressive strength. The rebound hammer test is quick, portable, and capable of testing a large number of locations in a single site visit — making it ideal for mapping strength variations across a structure. Results are best interpreted alongside UPV test data for a more accurate combined strength estimate. IS 516 Part 5 Sec 4 governs the procedure.

The UPV test (IS 516 Part 5 Sec 1) measures the velocity of ultrasonic pulses through the full depth of the concrete element — assessing internal homogeneity, voids, cracks, and overall quality. It is more sensitive to internal defects and gives a better estimate of in-situ strength for the whole cross-section. The rebound hammer test (IS 516 Part 5 Sec 4) measures surface hardness only and is more affected by surface conditions such as carbonation, wetness, and finish quality. Used together — a combined UPV and rebound hammer assessment — the two tests provide a more reliable and defensible strength estimate than either test alone, and is the recommended approach for structural audit reports submitted to CPWD and TNHB.

Yes. CPWD and TNHB accept our NDT reports because Jancy Labs holds ISO/IEC 17025:2017 accreditation (Certificate No. TC-12176) — which is the mandatory certification these departments require. PWD Tamil Nadu also accepts our reports for bridge and infrastructure audits. We recommend confirming the specific report format your department requires before commissioning the test — call us at +91-8680049004 and we will advise before mobilising.

Yes. Jancy Labs mobilises to project sites across Tamil Nadu to conduct UPV and rebound hammer tests on your structure. We also accept samples at our Madurai non destructive testing lab for lab-based assessment. For UPV and rebound hammer tests, on-site testing is typically the preferred option — as the transducers are applied directly to the structural element in its in-service condition. Call +91-8680049004 to discuss the site location, number of elements, and access requirements before scheduling.

Jancy Labs is based in Madurai and provides NDT testing lab services across Tamil Nadu — including Chennai, Coimbatore, Trichy, Tirunelveli, Salem, Dindigul, and surrounding districts. We mobilise our team to your project site for on-site non destructive testing, making Jancy Labs the practical NDT labs near me solution for contractors and consultants anywhere in Tamil Nadu. Call +91-8680049004 to check availability for your location and schedule.