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Home » NDT Testing

Rebound Hammer Test

Conducting rebound hammer test as per IS 13311(Part-2), ASTM C 805. The rebound hammer test shall be conducted at all those points were UPV test has been performed. One point consisting of six readings spread over an area of 1 sq. Shall be considered as 1 test.

Ultra-Sonic Pulse Velocity Test
Conducting Ultra-Sonic Pulse velocity (UPV) test at selected location on RCC members of the Structures covered under the study by making 300 mm x300mm c/c grids to know about the homogeneity and quality of concrete. The test shall be performed as p0er IS 13311 (Part-1) / ASTM C 597

Non Destructive Testing
Sigma is an ISO 17025:2005 accredited testing and analysis laboratory, conducting Non-Destructive tests on old and new buildings to evaluate in-situ compressive strength of the structure through specific tests like Rebound Hammer Test, IS 456:2000;1199:2002, carbonation tests, Ferro scanning tests, chemical analysis, moisture test by moisture meter and more.

Core extraction and testing
Extracting the concrete core samples of minimum 65 mm diameter and 100-150 mm length (approx.) at select location form RCC members of the structures covered under the study and evaluation the properties in the laboratory from the core samples selected.
IS 456:2000;IS 516:1959;IS 1199:2002; ASTM C-42.
Cut AND Pull Out (CAPO) Test
As per ASTM C-900

Half - Cell / Surface Potential Test
Measuring the half-cell /surface potential at select location on RCC members of the structures covered under the study to understand the extent of reinforcement corrosion as per ASTM C 876

Ferro Scanning Test
At select location on RCC members of the structures covered under the study to see the adequacy of concrete cover to rebars and effect of carbonation.

Carbonation Test
Measurement of carbonation depth by phenolphthalein spray test at select location on RCC members of the structures covered under the study to see the depth of carbonation.

Moisture Test by Moisture Meter
The moisture test is done with respect to depth to determine the moisture profiling of concrete.

Chemical Analysis
Chemical analysis of chlorides, Sulphates, pH, alkali silica, etc on concrete powder collected from the structures, covered under the study, by drilling to understand the chemical deterioration / degradation of concrete and its effect on reinforcement corrosion.

Ultrasonic Test Concrete
We offer the services for testing concrete where the velocity of ultrasonic pulses is measured and identification of cracks, voids, strength and elasticity is checked determining the areas which can provide the basis for recognizing the defects. The pulse velocity in a material depends on its density and its elastic properties which in turn are related to the quality and the compressive strength of the concrete.
In ultrasonic testing, very short ultrasonic pulse-waves with center frequencies ranging from 0.1-15 MHz and occasionally up to 50 MHz are launched into materials to detect internal flaws or to characterize materials. The testing is done through the methods such as Reflection and Attenuation.

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