Building Material Testing

Service Details:

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.

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.

Service Details:

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.

Service Details:

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.

 

Service Details:

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.

Service Details:

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.

 

Service Details:

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.

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Additional Information:

• Packaging Details: Normal

Service Details:

Sigma is a NABL accredited testing laboratory providing Concrete testing services by analyzing the strength, durability of concrete by ultrasonic 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)

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

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In-Situ Compressive Strength Of Concrete

Service Details:

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.

 

Service Details:

• (1)Ergonomic and modern design
• (2)Convenient and simple handling for soundless locking and release free of play
• (3)Available in various colours for all the demands of modern architecture
• (4)Lasting high level of functional safety with optimum lock-in position
• (5)Suitable for timber and PVC windows
• (6)High degree of security against unwanted guests due to the Secustik and pressure key versions and the lockable handles
• (7)TBT handle prevents unauthorised rotary opening: No turning position without key
• (8)Night vent with additional 45  lock-in position possible
• With optional SIEGENIA logo

Additional Information:

• Packaging Details: Normal

Service Details:

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
Absorbability test helps in determining the quantity of water absorbed in a specified time through the surface of an overlaid wood-based panel. The test method measures the rate of water weight gain within a controlled surface area of the overlaid panel surface when exposed to standing water.
Test Method : ASTM D 5795

Swelling in Thickness
Swelling in thickness test helps in determining the effect of ambient environment, temperature and relative humidity, on the hygroscopic thickness swelling rate of wood fiberboard and wood fiber/polymer composites. A swelling model describing the thickness swelling process of composites exposed to water vapor conditions was developed, from which the parameter, KSR, can be used to quantify the swelling rate.
Test Method : IS:2380 (P-17)1977, RA-203

Modulus of Rupture
Modulus of rupture is the maximum load carrying capacity of a member. It is generally used in tests of bending strength to quantify the stress required to cause failure. It is reported in units of psi.
Test Method : IS:1734 (P-11)1983, RA-2003, IS:1708 (P-5) 1985

Modulus of Elasticity
Modulus of elasticity test helps in determining the flexural stiffness and modulus of elasticity properties of wood-based materials by nondestructive testing using transverse vibration in the vertical direction.
Test Method : IS:1734 (P-11)1983, RA-2003, IS:1708 (P-5)1985

Internal Bond Strength
The purpose of this test is to design a compression shear device for easy and fast measurement of the bonded shear strength of wood-based materials.
Test Method : IS:1734 (P-4) 1983, RA-2003

Moisture content
Moisture content test helps in determining the moisture content (MC) of solid wood, veneer, and other wood-base materials, including those that contain adhesives and chemical additives.
Test Method : IS:1734 (P-1) 1983, RA-2003

Density
Analyzing tree density can serve great ecological and scientific function. The tools used to accumulate this knowledge are generally uncomplicated and minimize any ensuing damage done to tree specimens.
Test Method : 1708 (P-2)1986, RA-2008

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Scratch Resistance
The scratch resistance can be established e.g. in the Taber abrasion test, where the amount of haze is established after a number of abrasive cycles. The scratch resistance can also be determined quantitatively by measuring the weight loss after a number of sanding cycles. The pen test determines the indentation caused by a sharp pencil applied with a defined force.
Test Method : ISO 1518

Scrubbing Resistance
Scrubbing Resistance test helps in determining the resistance of paints to erosion caused by scrubbing. Although scrub resistance tests are intended primarily for interior coatings, they are sometimes used with exterior coatings as an additional measure of film performance.
Test Method

Spark Testing
One of the most important properties of a thin film coating is the adhesion (interfacial forces between two surfaces) between the coating and the substrate. The most common method of accurate measurement of thin film coating adhesion is the scratch tester.
Test Method

XENON Arc
XENON Arc test helps in determining the ability of a paint or coating to resist deterioration of its physical and optical properties caused by exposure to light, heat, and water can be very significant for many applications. This practice is intended to induce property changes associated with end use conditions, including the effects of sunlight, moisture, and heat. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena such as atmospheric pollution, biological attack, and salt water exposure.
Test Method : ASTM D6695 - 08

Volatile Content
Volatile Content test helps in determining the weight percent volatile content of solvent-reducible and water-reducible coatings.
Test Method : ASTM D2369, IS:101 (P-2) (SEC-2)1986

Water Content
The amount of water that paint coat could absorb is measured by the water content test. Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, fruit, paint or wood. Water content is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 (completely dry) to the value of the materials' porosity at saturation. It can be given on a volumetric or mass (gravimetric) basis.
Test Method : IS:101 (P-2) (SEC-1)1988

Water Resistance
Water can cause the degradation of coatings, so knowledge of how a coating resists water is helpful for assessing how it will perform in actual service.
Test Method : IS:101 (P7SC-1)1989, IS:13183-1991, IS:5691-1970

Abrasion Resistance
Abrasion Resistance test helps in determining the ability of a coating to resist degradation due to mechanical wear by hard and rough objects. Abrasion resistance can be enhanced by incorporation of surface modifying additives.
Test Method

Service Details:

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.

Non Destructive Testing

• Rebound Hammer Test
• Ultra-Sonic Pulse Velocity Test
• Core extraction and testing
• Cut AND Pull Out (CAPO) Test
• Half – Cell / Surface Potential Test
• Ferro Scanning Test
• Carbonation Test
• Moisture Test by Moisture Meter
• Chemical Analysis

Service Details:

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.

Service Details:

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.

Service Details:

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.

 

Service Details:

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.

 

Service Details:

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.

We provide Brick Testing in our Material Testing Laboratories. .

Apparent Porosity and Density
This Brick Testing helps in determining the porosity and density of bricks to be used for construction of load bearing walls. The method involves dimensional measurement and mass to determine density, followed by measuring the increase in mass when soaked in water for a standard period.
Test Method: IS: 1528 (P-8,9)1974

Water Absorption
The amount of water that a brick can absorb is measured by the water absorption test. There is no distinct relationship between water absorption and the water-tightness of walls. The results of water absorption tests are used by the brick manufacturer for quality assurance.
Test Method: IS: 3495 (P-2)1992

Permanent Linear Change
This test helps in determining the permanent linear change of refractory brick when heated under prescribed conditions, which will measure any potential shrinking when used for load bearing walls.
Test Method: IS: 1528 (P-6)1974

Abrasion Resistance
Abrasion (wear) resistance is achieved by controlling a whole series of factors. It is not sufficient to specify just an appropriate concrete strength. This must be complemented by proper construction practices, e.g. placing, compaction, finishing and curing. Where very high abrasion resistance is required, special aggregates or dry shake may be needed, either added to the surface or as a topping.
Test Method: IS: 5688-1982

Creep Test
Any one of a number of methods of measuring creep, for example, by subjecting a material to a constant stress or deforming it at a constant rate is called creep test. Creep in compression (CIC) refers to the percent of shrinkage of a refractory test piece under a constant load and exposed to a constant high temperature over a long period of time.
Test Method: IS: 1528 (P-18) 1993

Modulus of Rapture
The modulus of rupture (MOR) is the maximum surface stress in a bent beam at the instant of failure. One might expect this to be exactly the same as the strength measured in tension, but it is always larger because the volume subjected to this maximum stress is small, and the probability of a large flaw lying in the highly stressed region is also small.
Test Method: IS: 1528 (P-15)1991, IS: 1528 (P-5)1993

Fly ash / Lime Brick
Fly Ash Bricks are an environment friendly cost saving building product. These Fly ash bricks are three times stronger than conventional bricks with consistent strength. In presence of moisture, fly ash reacts with lime at ordinary temperature and forms a compound possessing cementitious properties. After reactions between lime and fly ash, calcium silicate hydrates are produced which are responsible for the high strength of the compound. Bricks made by mixing lime and fly ash are, therefore, chemically bonded bricks. These bricks are suitable for use in masonry just like common burnt clay bricks.
Test method: IS: 13757 / IS: 12894

Service Details:

• Advantage of Lancher Hinge: Easy installation, Anybody able to complete the installation with a screwdriver, simple and No drills required.
• Made of Solid cold-rolled steel, durable construction, Zinc Plated.
• Weight: 2oz * 4, dimension: 4.2 *1.7 inch Type: Non-Mortise Concealed 90 Degree Spring Hinge
• Package includes: 4 hinges and 32 Reinforced Stainless steel screws. (M4*14mm)

Additional Information:

• Packaging Details: Normal

Service Details:

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

Service Details:

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.

 

Service Details:

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.

Service Details:

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.

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Thermal Conductivity
Thermal conductivity depends upon the chemical and mineralogical compositions as well as the glassy phase contained in the refractory and the application temperature. The conductivity usually changes with rise in temperature. In cases where heat transfer is required though the brick work, for example in recuperates, regenerators, muffles, etc. the refractory should have high conductivity. Low thermal conductivity is desirable for conservation of heat by providing adequate insulation.
Test Method : IS:1528 (P-16)1991

Particle Size
Particle Size test helps in determining the percentile quantity of particles of known diameter within a sample. The specimen can be either passed through a set of standard sieves in its natural state, or if a significant amount of binding material is present, such as clay, then the sample can first be washed over a small aperture sieve to remove the binding material.
Test Method : IS:1528 (P-14) 1974

Water Absorption
The amount of water that a refractory can absorb is measured by the water absorption test. The results of water absorption tests are used for quality assurance.
Test Method : IS 3495 (P-2)1992

Apparent Porosity
Apparent porosity, water absorption, apparent specific gravity, and bulk density are primary properties of burned refractory brick and shapes. These properties are widely used in the evaluation and comparison of product quality and as part of the criteria for selection and use of refractory products in a variety of industrial applications.
Test Method : IS:1528 (P-8)1974

Cold Crushing Strength
Cold Crushing Strength test helps in determining the strength of a brick. It tells us how much load that refractory can bear in cold conditions. The concept of testing CCS of a refractory material has perhaps, come from metallurgy. This is because for any refractory brick it is rather; rare that it would fail simply due to load on it in cold condition and therefore, the determination of cold crushing strength does not appear to be important from that point of view.
Test Method : IS:1528 (P-4)1974

Bulk Density
A useful property of refractories is bulk density, which defines the material present in a given volume. An increase in bulk density of a given refractory increases its volume stability, its heat capacity, as well as resistance to slag penetration.
Test Method : IS:1528 (P-12)2009

Modulus of Rupture
The modulus of rupture (MOR) is the maximum surface stress in a bent beam at the instant of failure. One might expect this to be exactly the same as the strength measured in tension, but it is always larger because the volume subjected to this maximum stress is small, and the probability of a large flaw lying in the highly stressed region is also small.
Test Method : IS:1528 (P-5)1993, IS: 1528 (P-15)1991

Dimensional Check
Refractory materials must maintain dimensional stability under extreme temperatures (including repeated thermal cycling) and constant corrosion from very hot liquids and gases. The standard for refractory materials restricts compressive creep (deformation at a given time and temperature under stress) for normal working conditions to no more than 0.3 percent in the first 50 hours.
Test Method : IS:1077-1992, IS:10570-1983.

Service Details:

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.

Bend Test
Bend Test helps in determining the ductility, but it cannot be considered as a quantitative means of predicting service performance in bending operations. The severity of the bend test is primarily a function of the angle of bend and inside diameter to which the specimen is bent, and of the cross-section of the specimen. These conditions are varied according to location and orientation of the test specimen and the chemical composition, tensile properties, hardness, type, and quality of the steel specified.
Test Method : IS:1599-1985, IS:2329-2005, IS:3600 (P-5,6)1983

0.2% Proof Stress / Yield Stress
Yield strength is the lowest stress that produces a permanent deformation in a material. In some materials, like aluminium alloys, the point of yielding is hard to define, thus it is usually given as the stress required causing 0.2% plastic strain. This is called a 0.2% proof stress.
Test Method : ASTM E8 M-09?

Rebend Test
The purpose of re-bend test is to measure the effect of strain ageing on steel. Strain ageing has embrittlement effect which takes place after cold deformation by diffusion of nitrogen in steel. Hence, there is limitation stated in some design codes to restrict the nitrogen content of steel to 0.012%.
Test Method : IS:W1786-1986

Elongation
The elongation is the increase in length of the gage length, expressed as a percentage of the original gage length. In reporting elongation values, give both the percentage increase and the original gage length.
Test Method : IS:3600 (P-3)1989, ASME 5EC-lX

Ultimate Tensile Strength
Ultimate Tensile Strength test helps in determining the maximum stress that a material can withstand while being stretched or pulled before necking, which is when the specimen''s cross-section starts to significantly contract.
Test Method : ASTM A36, IS:1608-2005

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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.

Service Details:

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.

 

Rebound Hammer Testing

Procedure to extract the appropriate result:

• Prior to the test, the rebound hammer should be tested against the anvil to get reliable results for which the manufacturer of the rebound hammer indicates the readings on the anvil suitable for different types of rebound hammer.
• On applying light pressure on the plunger it will release it from locked position and allow it to extend to the ready position for the test.
• Press the plunger to the surface of the concrete, instrument being perpendicular to the test surface. Apply a gradual increase in pressure until the hammer impacts. Take an average of about 15 readings.

Service Details:

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.

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Through regular research and development, we are offering an exclusive collection of Concrete Mix Design. These services are rendered by experts according to the client’s requirement and work. In addition to this, offered concrete mix design services are appreciated due to their reasonable prices, and perfect execution.

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Tensile Test

Service Details:

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.

PVC Flooring Tile
PVC Flooring provides dust-free, noise absorbing, resilient, non-porous, decorative surface. It shall consist of a thoroughly blended composition of thermoplastic binder, filler and pigments.
Test Method : IS:3461

Frost Resistance
Ceramic tile frost resistance is defined as the ability of ceramic tile to withstand freeze/thaw conditions with minimal effect. The frost resistance of ceramic tile is dependent on the tile's porosity and water absorption levels. Frost damage can occur when the variety of ceramic tile absorbs moisture through its pores, causing the water to freeze internally when temperatures drop. Since water expands when it freezes, tension is then exerted inside the body of the ceramic tile. This internal pressure may become high enough to cause cracks in the ceramic tile.
Test Method : IS:13630 (P-10), BS EN 12371

Chemical Resistance Test
Chemical Resistance test is done to determine the ability of the grade of granite used by a1-safetech to resist chemical attack.
Test Method

Water Absorption
The amount of water that a refractory can absorb is measured by the water absorption test. The results of water absorption tests are used for quality assurance.
Test Method : IS: 1124-1974, IS:13030-1991, ASTM C 97-2009

Mohs Hardness
Mohs Hardness test helps in determining the hardness of rock. Because granite is a rock composed of multiple minerals, only crystals of specific minerals within the granite would be tested for hardness.
Test Method : IS:13630 (P-13) 2006

Modulus Rapture
The modulus of rupture (MOR) is the maximum surface stress in a bent beam at the instant of failure. One might expect this to be exactly the same as the strength measured in tension, but it is always larger because the volume subjected to this maximum stress is small, and the probability of a large flaw lying in the highly stressed region is also small.
Test Method : IS:ASTM C 99-2009, IS: 1578 (P-5)1993

Dimension Testing
Dimension test is done to check the dimensional stability of the rock. 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
Thermal shock is the name given to cracking as a result of rapid temperature change. Glass and ceramic objects are particularly vulnerable to this form of failure, due to their low toughness, low thermal conductivity, and high thermal expansion coefficients. However, they are used in many high temperature applications due to their high melting point.
Test Method : IS:13630 (P-5)2006, EN-104, ISO 10545 (P-4)

Breaking Strength
Rocks are considerably weaker in tension than in compression. Characterizing tensile strength of rocks thus is of great importance in many engineering and geophysical applications. Tensile strength is defined as the failure of stress.
Test Method : IS:13630 (P-6)2006, IS:4457-2007

Service Details:

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.

Service Details:

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…

10% Fine Value
This test is not is not too dissimilar from the test to determine the aggregate crushing value. But instead of using a standard force of 400kn., the force at which 10% of fines is produced is noted as the Ten Percent Fines Value.This usually requires a number of tests and a graph to establish the exact figure. This test tends to be used for softer aggregate where a force of 400kn. would crush most or all of the aggregate.
Test Method : IS:2386 (P-4)1963.

Alkali Aggregate Reactivity
Alkali-aggregate reaction is a term mainly referring to a reaction which occurs over time in concrete between the highly alkaline cement paste and non-crystalline silicon dioxide, which is found in many common aggregates. This reaction can cause expansion of the altered aggregate, leading to spalling and loss of strength of the concrete.
Test Method : IS:2386 (P-7) 1963

Chloride Content
The total chloride content of aggregate is usually measured to assess whether the aggregate's contribution to the total chloride content of a concrete mix will be low enough to prevent the early onset of corrosion of any embedded steel reinforcement.
Test Method : IS:4032-1985

Clay Lumps and friable Particles
This test helps in determining the percentage of clay lumps and friable particles in aggregate. Clay lumps in aggregate shall be defined as any particles or aggregation of particles which when thoroughly wet can be distorted when squeezed between the thumb and forefinger, or will disintegrate into individual grain sizes when immersed for a short period in water. Friable particles are defined as particles which vary from the basic aggregate particles in that they may either readily disintegrate under normal handling and mixing pressures imposed upon them by construction procedures, or break down after being incorporated into the work.
Test Method : IS:2386 (P-2) 1963

Clay Slit and Dust passing/ Sieve
This test helps in determining the particle size distribution of a granular material. The size distribution is often of critical importance to the way the material performs in use. A sieve analysis can be performed on any type of non-organic or organic granular materials including sands, crushed rock, clays, granite, feldspars, coal and soil, a wide range of manufactured powders, grain and seeds, down to a minimum size depending on the exact method. Being such a simple technique of particle sizing, it is probably the most common.
Test Method : IS:2386 (P-2) 1963

Service Details:

Rapid Chloride Penetration Testing.