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

Testing Services

Building Material Testing

Concrete Testing

Cement Testing

Aggregate Testing

Brick Testing

Refractory Material Testing

Marble / Granite Testing

Steel Testing

Wood Testing Services

Paint & Coating Testing

Bitumen Testing Services

Coal Testing

Chemical Testing

Environmental Testing

Ferrous & Non Ferrous Metals Testing

Food / Agro Testing

Oil & Petroleum Testing

Paper & Packaging Testing

Pesticides Testing

Processed Food Nutrition Value Testing

Soil Testing

Water Testing

Textile Testing

RoHS Compliance Testing

Diesel Testing Lab

NDT Testing

Residue Analysis

Toy Testing

Electrical Testing

Automotive Part Testing

Calibration Services

Lab Supplies

Analytical Balance

Calibration Weight Box

Viscosity Standards

Hardness Blocks

Process Calibrator

Stability Chamber


Home » Building Material Testing

Building Material Testing

Sigma is a NABL accredited laboratory as per ISO 17025:2005 , ISO 14001:2004 delivering an extensive range of building material tests from the pre-construction phase till post-construction, analyzing the quality of building materials testing on soils, rocks, aggregates, concrete, bricks-blocks, steel and polymers.

In today's global markets and increasing emphasis on quality, need for laboratory data has increased many fold and top of that accuracy and reliability of data is an another concern.

Our construction material engineering and testing credentials speak for themselves. Our professional engineers having vast experience and understanding of material testing, construction materials and construction practies. Our team of engineers and technicians help our clients anticipate and minimize potential issue and delays.

Our laboratories are equipped with the latest sophisticated building material testing equipments. Our services include not only material testing services as well as engineering observation, structural inspection etc.

STRC has experience in testing wide range of construction materials, including Cement,Concrete, Aggregates, Admixture, Flyash, Masonry, Tiles, Wood, Steel, Aluminium, Bricks, Query stones, WMM, GSB and many more.

Our team of consultants and technologists create customized material testing programs to meet the demands of manufacturers having proprietory products. When taking a new or revised product to market having it validated by a reputable independent test Laboratory will likely increase its acceptance in the marketplace.

Rebound Hammer Test
Sigma is NABL and ISO / IEC 17025:2005 accredited laboratory providing extensive test facilities for construction and building material testing by measuring the compressive strength, quality and uniformity of concrete by Rebound hammer test-IS:13311. Rebound Hammer Test is done to find out the compressive strength of concrete by using Rebound Hammer as per IS:13311 (Part 2) – 1992. The rebound of an elastic mass depends on the hardness of the surface against which its mass strikes. When the plunger of the rebound hammer is pressed against the surface of the concrete, the pring-controlled mass rebounds and the extent of such a rebound depends upon the surface hardness of the concrete. The surface hardness and therefore the rebound is taken to be related to the compressive strength of the concrete. The rebound value is read from a graduated scale and is designated as the rebound number or rebound index. The compressive strength can be read directly from the graph provided on the body of the hammer.

Earth Resistance Testing
Sigma is an ISO 9001:2008 certified laboratory delivering on-site testing of earth ground resistance and soil resistance based on wenner 4-point method and IS: 15736-2007  for ensuring equipment and manpower safety.

Core Cutting Test on Concrete
This is a partially destructive test that is used to co-relate the various other properties of the concrete viz. UPV, electrical resistivity, rebound number etc. It is customary to take cores of 4 inch diameter for compressive strength determination.Concrete core drilling for strength determination is again dependent upon various factors for reliability. The conversion of concrete core (typically 3 or 4 inch diameter core) strength into 150 mm saturated cube strength depends upon :
With so many factors contributing to the final 150 mm saturated cube strength, the strength variation may be + / - 10% - 15%. However, it can be used to confirm the results of UPV differing largely in the values & also for co-relation. Hence the UPV & core results should be judiciously used, interpreted & co-related.

Concrete Testing

Sigma is a NABL accredited testing laboratory providing Concrete testing services by analyzing the strength, durability of concrete by ultra sonic survey, chloride content, cube compressive strength, IS: 15658-2006, IS: 516-1959,AASHTO T277 and more.

Design Mix
Design mix test helps in determining the suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required, strength, durability, and workability as economically as possible, is termed as concrete mix design. It involves studying properties of Aggregate, Cement, water & Admixture (if any) in use to determine the proper concrete mix.
Test Method : IS:10262

Chloride Content
Measuring the calcium chloride content of concrete is used to determine how dry the concrete is. This test is useful to tell if the concrete is ready for projects such as installing flooring on top of the concrete slab. Though some conditions can alter the results, such as the season of the year, the porosity of the concrete, or the mixture of the concrete, a calcium chloride test usually provides a good determination of the usability of concrete.
Test Method : IS:6925-1973

Chloride Permeability
The chloride permeability of normal weight concrete subjected to static and repeated compressive loading was evaluated by using this test method. The test results indicated that the chloride permeability of concrete subjected to static and repeated loading increased at an increasing rate with its residual strain. This test covers the determination of the electrical conductance of concrete to provide a rapid indication of its resistance to the penetration of chloride ions.

Test Method : AASHTO T277

Chloride Ponding
Chloride Ponding test helps in determining the depth to which chloride ions can ingress into concrete over a period of time in standard conditions. It can be used to assess a concrete for its resistance to chloride attack and thus protection of the reinforcement from corrosion.
Test Method

Cube Compressive Strength
The cube test is the test most commonly used for determining concrete strength. The value of compressive strength can then be used to assess whether the batch that the concrete cube represents meets the required compressive strength. A cube of concrete in cast is cured for the appropriate time and is then compressed between two parallel faces. The stress at failure is taken to be the compressive strength of the concrete.
Test Method : IS:456, IS:15658-2006, IS:516-1959

Ultrasonic Survey
Ultrasonic concrete testing is based on the pulse velocity method to provide information on the uniformity of concrete, cavities, cracks and 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. It is therefore possible to obtain information about the properties of components by sonic investigations.
Test Method : IS 13311 (Part 1)

Ultrasonic Concrete Testing
Sigma is an ISO 9001:2008 accredited laboratory delivering Ultrasonic testing of concrete with path length measurement, perpendicular crack depth measurement and surface velocity measurement, giving information on uniformity of concrete, cavities, cracks and defects through IS 13311-Part 1.

Depth of Carbonation
Carbon dioxide penetrates in the concrete pores. This penetration is more fast when concrete is more porous. It can then react with cement and form carbonates. This reaction decreases the concrete Ph. So, carbonation starts on concrete surface, and concerns some thickness (called carbonation depth) of this material.Carbonation is a particularly important form of deterioration. Enough carbonation gives concrete the immediate positive effects of increased; compressive strength, modulus of elasticity, surface hardness, resistance to frost, sulphate attack, internal stresses and the ultimate reduction of the structure's capacity.
Test Method

Drying Shrinkage/ wetting Expansion
A common saying is that there are two guarantees with concrete. One, it will get hard and two, it will not crack. Cracking is a frequent cause of complaints in the concrete industry. Cracking can be the result of one or a combination of factors such as drying shrinkage, thermal contraction, restraint (external or internal) to shortening, subgrade settlement, and applied loads. Values of drying shrinkage and wetting expansion of concrete are often useful to measure at the time of mix design trials to ensure the concrete will exhibit values that are within normal ranges for concrete.
Test Method : IS:1199-1959

Flexural Strength
Flexural strength is the ability of a beam or slab to resist failure in bending. It is measured by loading un-reinforced 6x6 inch concrete beams with a span three times the depth (usually 18 in.). The flexural strength is expressed as “Modulus of Rupture” (MR) in psi. Flexural MR is about 12 to 20 percent of compressive strength. However, the best correlation for specific materials is obtained by laboratory tests.
Test Method : IS:516-1959, ASTMC 494-2010

Porosity
Concrete durability is related to porosity, which determines the intensity of interactions of the material with aggressive agents. The pores and capillaries inside the structure facilitate the destructive processes that generally begin in the surface. Generally, concrete of a low porosity will afford better protection to reinforcement within it than concrete of high porosity. Porosity can be measured by vacuum saturation of a concrete specimen, measuring its weight gain and expressing this as a percentage of the mass of the sample.
Test Method

Sulphate Content
Measuring the Sulphate content of concrete is used to check that the Sulphate levels are low enough to avoid any later problems with deterioration of the concrete. This test can be used at concrete mix design stage to ensure low sulphate levels have been achieved, or on older concrete structures to measure the level of ingress of Sulphate. The test can be conducted in a variety of chemical means.
Test Method : BS:812(P-118)

Water Absorption
Water Absorption test helps in determining the rate of absorption of water by cement concrete by measuring the increase in the mass of a specimen resulting from absorption of water as a function of time when only one surface of the specimen is exposed to water. The exposed surface of the specimen is immersed in water and water ingress of unsaturated concrete dominated by capillary suction during initial contact with water.
Test Method : ASTM C 1084


Water penetration used to measure the surface hardness and hence the strength of the surface and near surface layers of the concrete. Water penetration causes the concrete reinforcement to rust and expand which in turn creates stresses on the surrounding concrete which can then spall (break away).
Test Method : ASTM C 1084

Pile Integrity Test (PIT)
Pile Integrity Test is done to measure Pile length, depth to anomalies, Pile head stiffness, Pile shaft mobility – which is dependent on pile section and concrete properties.
Test Method

Ad Mixture
Concrete Admixture is a chloride free, high range water-reducing admixture. It disperses the fine particles in the concrete, enabling water content in the concrete to perform more effectively and improving the consistency of the concrete.
Test Method : IS:9103 / 1999

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Cement Testing

Sigma is a ISO 17025:2005 accredited testing laboratory providing cement testing through Chemical analysis ,Compressive strength, Fineness, Heat of Hydration, Setting Time and more through various IS tests like IS: 4031 (P-5) 1996, IS: 4031 (P-3) 1990.

Chemical Analysis
Chemical analysis of hardened concrete can provide a wealth of information about the mix constituents and possible causes of deterioration. Standard methods can be used to find the cement content and original water/cement ratio, but many other properties can also be established; Cement Content and Aggregate Cement Ratio, Cement Content and Pulverised fuel ash/fly ash (pfa) content, Cement Content and Slag content, Water/Cement Ratio, Aggregate Grading, Determination of the presence of High-Alumina Cement (HAC)
Test Method : IS:4032-1985

Compressive Strength
The most common strength test, compressive strength, is carried out on a 50 mm (2-inch) cement mortar test specimen. The test specimen is subjected to a compressive load (usually from a hydraulic machine) until failure.
Test Method : IS:4031 (P-6) 1988

Fineness
The fineness of cement has an important bearing on the rate of hydration and hence on the rate of gain of strength and also on the rate of evolution of heat. Greater fineness increases the surface available for hydration, causing greater early strength and more rapid generation of heat. Cement fineness play a major role in controlling concrete properties. Fineness of cement affects the place ability, workability, and water content of a concrete mixture much like the amount of cement used in concrete does.
Test Method : IS:4031 (P-2)1990

Heat of Hydration
When cement is mixed with water, heat is liberated. This heat is called the heat of hydration, the result of the exothermic chemical reaction between cement and water. The heat generated by the cement’s hydration raises the temperature of concrete.
Test Method : 4031 (P-9) 1988

Loss On Ignition
The loss on ignition is reported as part of an elemental or oxide analysis of a mineral. The volatile materials lost usually consist of "combined water" (hydrates and labile hydroxy-compounds) and carbon dioxide from carbonates. It may be used as a quality test, commonly carried out for minerals such as iron ore. For example, the loss on ignition of a fly ash consists of contaminant unburnt fuel.
Test Method : IS:4032-1985

Setting Time
Initial setting time is the time that elapsed from the instance of adding water until the paste ceases to behave as fluid or plastic. Whereas final setting time referred to the required for the cement paste to reach certain state of hardness to sustain some load.
Test Method : IS:4031 (P-5) 1996

Soundness
Soundness refers to the ability of a hardened cement paste to retain its volume after setting. Lack of soundness is observed in the cement samples containing excessive amount of hard burnt free lime or magnesia.
Test Method : IS:4031 (P-3) 1990

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Aggregate Testing

Sigma is a NABL accredited testing and analysis laboratory delivering cutting-edge solutions for Aggregate testing for construction and building material industry, through diverse tests like Bulk density ,Polished aggregate friction value, Particle density and water absorption ,Sieve analysis, Aggregate crushing value, IS: 2386 (P-4)1963,Petrography analysis, Alkali Aggregate Reactivity, Chloride Content, IS: 2386 (P-2) 1963  and more.Aggregate Testing solutions offered are achieved through a wide range of test options. These include 10% Fine Value which is similar to one used in determining aggregate crushing value. Here, the possible variation is that instead of using standard force comprising 400kn, the force from which 10% of fines is produced is noted as Ten Percent Fines Value. For arriving at this figure, a number of tests need to be done and graph interface used for establishing exact figure. The test is preferred to be done for softer aggregates where force of 400kn. would be able to easily crush most/all of present aggregate. The test method used here is as per IS:2386 (P-4)1963.

Other than this, other testing procedures that can be followed for aggregate testing include:
Alkali Aggregate Reactivity –

Test Method – IS:2386 (P-7) 1963
Chloride Content –
The process of measuring total chloride content in aggregate is done for assessing if aggregate's contribution in total chloride content present in concrete mix is low enough for preventing early onset of corrosion in any of the steel reinforcement embedded

Test Method: IS:4032-1985
Clay Lumps and friable Particles –

Test Method: IS:2386 (P-2) 1963
Clay Slit and Dust passing/ Sieve –

Test Method: IS:2386 (P-2) 1963
Compaction Fraction –

Crushing Value –

Test Method: IS:9376-1979, IS: 2386 (P-4)1963
Drying Shrinkage –

Flakiness and Elongation Index –

Test Method: IS:2386 (P-1) 1963
Impact Value –

Test Method: IS:2386 (P-4) 1963, ASTMC 131-2006
Lightweight Pieces –

Los Angle Abrasion –
This abrasion test is used as a common test for indicating aggregate toughness as well as abrasion characteristics
The aggregate abrasion characteristics play an important past as constituent aggregate in HMA should produce a high quality HMA by –
Test Method: IS:2386 (P-4) 1963
Organic Impurities Effect on Mortar Strength –

Test Method: ASTM C40
Organic Impurities –

Test Method: IS: 2386 (P-2)1963
Particle Size Distribution –

Test Method: IS: 2386 (P-1) 1963, ASTM C136-2006, IS: 383-1970
Sand Equivalent Value –

Test Method: MORTM, IS: 2720 (Pt-37)1976, ASTM D 2419-2009
Soundness –

Test Method: IS: 2386 (P-5)1963
Specific gravity and water absorption –
Test Method: IS: 2386 (P-3)1963, ASTM C 127, 128-2007
Sulphate Content –
Test Method: IS: 4032-1985

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Brick Testing

Sigma is a NABL and ISO / IEC 17025:2005 accredited laboratory delivering cutting-edge Brick Testing services for different types of Bricks like clay bricks, fly ash/Lime bricks, acid resistance bricks, fire resistance bricks, refractory bricks through various IS tests like IS: 1528 (P-8,9)1974IS: 13757 / IS: 12894, :IS: 5688-1982 and more.

Brick Testing solutions offered can be done through wide range of testing procedures. On among these include Apparent Porosity and Density test which allows determining porosity as well as density of bricks that find application for construction of load bearing walls. The method comprises dimensional measurement as well as mass for determining density which is followed through measuring enhancement in mass in event of being soaked in water for standard defined period. The test method employed here includes IS: 1528 (P-8,9)1974. Other than this, other tests that are performed for brick testing process include:
Water Absorption –

Test Method: IS: 3495 (P-2)1992
Permanent Linear Change –
Test Method: IS: 1528 (P-6)1974
Abrasion Resistance –

Test Method: IS: 5688-1982
Creep Test –

Test Method: IS: 1528 (P-18) 1993
Modulus of Rapture –
Test Method: IS: 1528 (P-15)1991, IS: 1528 (P-5)1993
Fly ash / Lime Brick – Test method: IS: 13757 / IS: 12894

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Refractory Material Testing

Refractory Material Testing solutions offered comprise a wide range of testing solutions including Thermal Conductivity depending upon mineralogical compositions, chemical and glassy phase which is contained in refractory as well as in application temperature. The conductivity helps in changing rise in temperature especially in case requiring heat transfer though brick work like in muffles, regenerators and others. Further, the refractory also need to have high conductivity where low thermal conductivity is desirable in conservation of heat through providing adequate insulation. The test method employed here is IS:1528 (P-16)1991. Some other testing processes used here include:
Particle Size –

Test Method: IS:1528 (P-14) 1974
Water Absorption –

Test Method: IS 3495 (P-2)1992
Apparent Porosity –

Test Method: IS:1528 (P-8)1974
Cold Crushing Strength –

Test Method: IS:1528 (P-4)1974
Bulk Density –
Test Method: IS:1528 (P-12)2009
Modulus of Rupture –

Test Method: IS:1528 (P-5)1993, IS: 1528 (P-15)1991
Dimensional Check –

Test Method: IS:1077-1992, IS:10570-1983
Creep Test –

Test Method: IS:1528 (P-18)1993
Permanent Linear Change –

Test Method: IS:1528 (P-6)1974
Pyrometric Cone Equivalent –

Refractories Under Load –

Test Method: ISO 1893
Abrasion Test – Air Permeability Test – Petrographic Analysis by Optical Microscopy –
Acid Resistance Test – Test Method: IS:4860-1968

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Marble / Granite Testing

Reliable Granite testing is delivered by ISO 17025:205 accredited Sigma through diverse tests like Water absorption, Mohs Hardness, Modulus Rapture, Dimension Testing by meeting the IS specifications and regulations.

Marble / Granite Testing solutions offered comprise a wide range of tests including PVC Flooring test that is used for achieving resilient, non-porous, dust-free, noise absorbing and decorative surface. The test comprises thoroughly blended composition of fillers, pigments and thermoplastic binder with test method as per IS:3461. The other testing done for marble/granites includes:
Frost Resistance –

Test Method: IS:13630 (P-10), BS EN 12371
Chemical Resistance Test –
Water Absorption –

Test Method: IS: 1124-1974, IS:13030-1991, ASTM C 97-2009
Mohs Hardness –
Test Method: IS:13630 (P-13) 2006
Modulus Rapture –
This test is done for checking maximum surface stress and is done in bent beam at instant of failure
Test Method: IS:ASTM C 99-2009, IS: 1578 (P-5)1993
Dimension Testing –

Test Method: IS: 1130-1969, IS: 3316-1974, IS: 14223 (P-1) 1995, IS: 3622-1977, ASTM Test Method: IS:1130-1969, IS:3316-1974, IS:14223 (P-1) 1995, IS:3622-1977, ASTM C 625, 616, 629, 503
Thermal Shock Test –
Test Method: IS:13630 (P-5)2006, EN-104, ISO 10545 (P-4)
Breaking Strength – Test Method: IS:13630 (P-6)2006, IS:4457-2007

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Steel Testing

Sigma is a NABL accredited testing laboratory delivering steel testing services for construction, building materials, aircraft maintenance, refineries through diverse tests like Bend test, elongation, ASTM A36, IS: 1608-2005, Rebend test, 0.2% Proof stress / Yield stress and more.Steel Testing solutions offered comprise a wide range of tests for understanding the quality of the steel and its suitability for varied end applications. Among the test performed, one includes Bend Test which helps in determining ductility. Here, the severity of bend test is performed for judging function of angle of bend as well as inside diameter to which specimen is bent as well as of cross-section of specimen. The conditions for testing are varied depending upon orientation of test specimen and chemical composition, hardness, type, tensile properties as well as quality of steel specified. The Test Method used here include IS:1599-1985, IS:2329-2005, IS:3600 (P-5,6)1983. Apart from this, some of the other testing procedures that are performed for this include:
0.2% Proof Stress / Yield Stress –

Test Method: ASTM E8 M-09
Rebend Test –

Test Method: IS:W1786-1986
Elongation –

Test Method: IS:3600 (P-3)1989, ASME 5EC-lX
Ultimate Tensile Strength –
Test Method: ASTM A36, IS:1608-2005

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Wood Testing Services

Sigma is a ISO 17025:2005 accredited testing laboratory offering specialized wood testing services on different types of wood like Timber, Plywood, Particle Board, Block Board, implementing various IS tests like modulus of rupture and elasticity , IS: 1734 (P-1) 1983, ASTM D 5795, Dimensions stability, Moisture content, Density and more…
Compression Strength
The box compression test (bct) measures the compressive strength of boxes made of corrugated fiberboard as well as wooden boxes and crates. It provides a plot of deformation vs compressive force. Containers other than boxes can also be subjected to compression testing: drum, pail, etc.
Test Method

Wood-based Panels
Wood-based panels test helps in determining the structural panels of uniform properties within a panel. It is useful for evaluating plywood of clear, straight-grained veneers, and determining the effect of chemical or preservative treatments, construction, principal direction with respect to direction of stress, and other variables that are expected to uniformly influence the panel.
Test Method: IS:4020 (P-1 to 16)1998
Absorbability –

Test Method: ASTM D 5795
Swelling in Thickness –

Test Method: IS:2380 (P-17)1977, RA-203
Modulus of Rupture –

Test Method: IS:1734 (P-11)1983, RA-2003, IS:1708 (P-5) 1985
Modulus of Elasticity –

Test Method: IS:1734 (P-11)1983, RA-2003, IS:1708 (P-5)1985
Internal Bond Strength –

Test Method: IS:1734 (P-4) 1983, RA-2003
Moisture content –

Test Method: IS:1734 (P-1) 1983, RA-2003
Density –

Test Method: 1708 (P-2)1986, RA-2008
Bending Strength –

Test Method: IS:1734 (P-11) 1983
Ability To Hold A Screw –

Test Method: IS:2380 (P-14)1977, RA-2003, IS:1708 (P-15)1986
Dimensions Stability –

Test Method: IS:4020 (P-3)1998
Wood Quality –

Test Method: IS:4020 (P-4)1998
Impact of A Soft Body –

Test Method: IS:4020 (P-8)1998
Resistance To Indentation –

Test Method: IS:4020 (P-5)1998
Flush Door Shutter –

Test Method: IS:2202
Pre laminated Particle Board –
The test helps in determining resistance to –
Steam Dimension Water absorption Cracks
Density Swelling in water Adhesion of plies Moisture
Resistance to stains Resistance to water Tensile strength Screw withdrawal strength
Resistance to cigarette burn Modulus of rupture Tensile strength perpendicular to surface Tensile strength perpendicular to surface post ageing
Abrasion resistance Dimension Density & density variation Strength
Swelling due to surface absorption

Test Method : IS:12823
MDF / MDP Board –

Test Method : IS:12406 & IS:3087
FRP / GRP Door Shutter –
The test assists in determining features like –
Test Method: IS:4020 / 14856
Ply Wood –
Test Method: IS:303 / 1989

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Paint & Coating Testing

Sigma is an ISO17025:2005 accredited Paint and Coating testing laboratory, analyzing paints for abrasion resistance, Adhesion testing, chemical resistance, cyclic corrosion, gloss, condensing humidity and more.

Paint & Coating Testing solutions offered can be handled through a wide range of tests performed one of which is for checking Scratch Resistance through Taber abrasion test which helps in establishing amount of haze after number of abrasive cycles. Further, it can also be determined quantitatively through measurement of weight loss after number of sanding cycles. The test method employed here is based on ISO 1518. Apart from this, some of the other tests that are performed include:
Scrubbing Resistance –
Spark Testing –

XENON Arc –

Test Method: ASTM D6695 - 08
Volatile Content –

Test Method: ASTM D2369, IS:101 (P-2) (SEC-2)1986
Water Content –

Test Method: IS:101 (P-2) (SEC-1)1988
Water Resistance –

Test Method: IS:101 (P7SC-1)1989, IS:13183-1991, IS:5691-1970
Abrasion Resistance –
Adhesion –

Test Method: IS:101 (P-5)(SEC-2)1988
Alkali Resistance of Paint –
The test helps in determining degree to which paint provides resistance reaction with alkaline materials like –
Test Method: IS:427-2005, IS:428-2006
Cass Test –

Chemical Resistance –

Test Method: IS: 13630 (P-8) 2006, EN 105-106
Chip Resistance –

Coating Thickness –

Test Method: IS:6745-1972
Condensing Humidity –
Test Method: IS:101 (P-6) (SEC-1)1988
Crosshatch Adherence –
Cyclic Corrosion –

Drying Time –
The test is done to know if coating is totally dry
Test Method: IS:101 (P-3) (SEC-4)1986
Failure Analysis – Falling Weight –
Flexibility –

Free Falling Sand Abrasion –

Test Method: ASTM D968
FTIR –
Gloss (60deg.C) –

Test Method: IS:13607-1992, IS:5691-1970
Hardness –

Test Method: ASTM D3363 / ASTM D1474
Impact Resistance –

Test Method: IS:101 (P-5)(SEC-3)1999
Moisture Content –

Peel –
The test assists in determining resistance to –

Penetration Resistance –

Salt Spray –
Test Method: IS:2074-1992, IS:13183-1991, IS:13607-1992

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Bitumen Testing Services

Sigma is NABL certified, ISO / IEC 17025:2005 accredited laboratory delivering advanced solutions for assessing the consistency and suitability of Bitumen through various IS compliant test methods like Flash point, specific gravity, water content, paraffin wax, ductility test, Bitumen emulsion and more.

Bitumen Content
This test helps in determining the bitumen content. The apparatus needed to determine bitumen content are - Centrifuge extractor and Miscellaneous – bowl, filter paper, balance and commercial benzene.
Test Method : ASTM 2172, IS: 1202-1220

Bitumen Penetration
This test helps in determining the consistency of bituminous material & to assess the suitability of bitumen for use under different climatic conditions and various types of construction.
Test Method : IS:1203-1978

Flash Point
This test helps in determining the flash point and the fire point of asphaltic bitumen and fluxed native asphalt, cutback bitumen and blown type bitumen. The fire point is the lowest temperature at which the application of test flame causes the material to ignite and burn at least for 5 seconds under specified conditions of the test.
Test Method : IS:1209 – 1978

Specific Gravity
This test helps in determining the specific gravity of semi-solid bitumen road tars, creosote and anthracene oil. The principle is that it is the ratio of mass of a given volume of bitumen to the mass of an equal volume of water, both taken at a recorded/specified temperature.
Test Method : IS:1202 – 1978

Paraffin Wax
This test mainly used for food and other commodities (such as wax paper, crayons, candles, carbon paper) components and packaging materials, baking container coating materials, cosmetic raw materials, used in fruit preservation, and improve the rubber anti - aging and increased flexibility, electrical components, insulation, precision casting, etc., also can be used for synthesis of fatty acid oxidation. Crude paraffin oil content of more due mainly used in the manufacture of matches, etc. Adding polyolefin wax additive, its melting point is increased, adhesion and flexibility increase, widely used in moisture-proof, waterproof wrapping paper, cardboard, certain textiles, surface coating and candles production.
Test Method : IS:4654-1993

Loss on Heating
This test helps in determining the effects of heat & air during conventional hot-mixing on a thin film of semi-solid bitumen. The determination of the loss in mass is used to determine the volatility upon heating.
Test Method : IS:122-1978

Water Content
This test helps in determining the water in petroleum products, tars, and other bituminous materials by the distillation method.
Test Method : IS:1211-1978

Ductility Test
This test helps in determining the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products. The principle is: The ductility of a bituminous material is measured by the distance in cm to which it will elongate before breaking when a standard briquette specimen of the material is pulled apart at a specified speed and a specified temperature.
Test Method : IS:1208 – 1978

Bitumen Emulsion
This test helps in determining the dispersion of bitumen in water. However, in the same way as water and oil do not mix easily, water and bitumen together do not get on.

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