Building Material - Civil,
Refractory Materials, NDT, Ultrasonic Testing
Geo Technical Investigation, Concrete Mix , Transformer
Oil, Food & Water
Nutritional Value, Pharma , Micro Biology, Shell Life,
Ferrous & Non Ferrous Metals
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.
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 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