At NKERC Labs Pvt. Ltd., formally known as N.K Engineering and Research Center, we offer a comprehensive range of material and environmental testing services designed to support quality assurance, safety, and regulatory compliance across various industries.

We are equipped with advanced testing instruments and facilities, along with a team of experienced professionals dedicated to accuracy, reliability, and timely reporting.

Our fully equipped laboratory in Patna, Bihar, provides accurate, timely, and traceable test results using standardized procedures and advanced instrumentation. Whether you’re in construction, manufacturing, or environmental management, our testing services help ensure that your materials and processes meet national and international benchmarks.

Our Core Testing Services

1

Coarse Aggregate

  • Crushing Value, Elongation Index, Material Finer than 75 micron IS Sieve, Water Absorption, 10% fines value
  • Alkali Aggregate Reactivity, Bulk Density, Deleterious Materials (Clay lumps), Petrographic Examination, Sieve Analysis (80 mm to 2.36mm)
  • Specific Gravity, Aggregate Impact Value, Deleterious Material (Coal & Lignite), Flakiness Index
  • Los Angeles Abrasion Value, Polished stone value, Soundness by MgSO4, Soundness by Na2SO4, Stripping Value

2

Fine Aggregate

  • Alkali Aggregate Reactivity, Bulk Density, Deleterious Materials (Clay lumps),
  • Petrographic Examination, Sieve Analysis (10mm to 0.150 mm), Deleterious Material (Coal & Lignite),
  • Material finer than 75 micron, Soundness by MgSO4, Soundness by Na2SO4,
  • Specific Gravity, Water Absorption, Sand Equivalent Value

3

Bitumen Emulsion

  • Coagulation of emulsion @ low temperature, Residue by evaporation, Penetration 25 °C/100g/5 Sec
  • Ductility 27 °C, Solubility In Trichloroethylene, Particle charge
  • Residue on 600 micron IS sieve, Stability to mixing with cement, Storage stability after 24 hour
  • Viscosity By Say Bolt Furol Viscometer @ 25 °C, Water Content

4

Paving Bitumen

  • Absolute Viscosity at 60°C, Ductility TFOT
  • Solubility in trichloroethylene, Specific Gravity
  • Viscosity Ratio at 60°C, Flashpoint, Flashpoint (COC)
  • Kinematic Viscosity at 135°C, Penetration, Softening Point

5

Bituminious / Concrete Road Section

  • Bridge Load Test (Bituminous & Concrete Section)

6

Polymer Modified Bitumen

  • Elastic recovery of half thread in ductilometer at 15°C
  • Frass Breaking Point, Loss in mass, Loss in weight, Separation
  • Mineral Matter (Ash), Softening Point, Solubility in HDO
  • Flashpoint, Viscosity at 150 °C, Solubility in LDO

7

Cement (OPC / PPC / PSC)

  • Standard Consistency, Compressive Strength, Initial Setting Time
  • Density, Fineness by Blaine Permeability method, Transverse strength
  • Fineness By Dry Seiving Method, Soundness by Autoclave expansion method
  • Soundnessby Le – Chatelier Expansion method, Final Setting Time

8

Burnt Clay Building Bricks / Fly Ash Building Bricks

  • Efflorescence
  • Warpage
  • Water Absorption
  • Compressive Strength

9

Fly Ash

  • Specific Gravity, Compressive Strength
  • Fineness by Blaine Air Permeability
  • Lime Reactivity, Particles Retained on 45 micron
  • Soundness by Autoclave Expansion method

10

HDPE / Sheathing Duct

  • Dimension (Dia & Thickness)
  • Transverse Load Rating Test
  • Water Loss Test
  • Workability, Load Tension

11

Retro Reflective Signboards / Road Studs / TR MM

  • Coefficient of Retro – Reflection – RL & QD
  • Coefficient of Retro – Reflection – RL & QD

12

Thermo Plastic Road Marking Material

  • Free Flow Test, Glass Beads Content, Refractive Index
  • Gradation of Glass Beads (Type 1 & 2), Skid Resistance test
  • Softening Point, Yellowness Index, Colour, Drying Time
  • Coeff Of Retro- Reflection, Cracking Resistance, Binder Content

13

Bentonite

  • Fineness, Swelling, Sand Content
  • Gel Formation Index
  • Moisture Content
  • Viscosity at 30°C

14

Soil

  • Liquid Limit, Plasticity Index, Plastic Limit, Tri axial shear Test (fie)
  • Free Swell Index, Grain size Analysis – Wet (75 micron to 2.0 mm)
  • Water content, Direct Shear Test (fie), Heavy Compaction OMC
  • Light Compaction OMC, California Bearing Ratio (C.B.R.) – Soaked

15

Reinforcement Steel Bar

  • Bend Test, Cross sectional area
  • Mass per meter, Thickness, Diameter
  • Elongation Percent, Re-Bend Test
  • Ultimate Tensile Strength, Yield Stress / 0.2 proof stress

16

MBCB / Ferrous Materials & alloys products Structural Steel

  • Bend test, Elongation
  • Thickness, Yield stress
  • Cross sectional area, Rockwel hardness
  • Ultimate Tensile Strength

17

Reinforced Concrete Structures

  • Pile Integrity Test
  • Rebound Hammer
  • Ultrasonic Pulse Velocity Test
  • Cover Meter
  • Carbonation Depth
  • Half Cell Potential
  • Pullout Strength of Hardness Concrete

Why Choose NKERC Labs Pvt. Ltd.?

  • NABL – Compliant Testing Methodologies
  • Advanced Equipment & Certified Experts
  • Fast Turnaround with Detailed Reports
  • Flexible Sampling Options – Onsite & Offsite
  • Transparent, Client-Focused Service