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PNJ Engineering Inc. develops and implements appropriate and effective quality control and quality assurance programs with the specific needs of our clients in mind. Timely on site service, reporting and accurate test results are key features of our quality assurance services.

Our qualified and experienced professional staff carry out field inspections, testing and utilize fully equipped permanent and mobile laboratories (if required) to perform laboratory testing to ensure that construction materials and methods are in accordance with the specified requirements and established codes and practices.






Mix Designs for:


  • Marshall Mixes

  • Superpave Mixes

  • Warm Mix Asphalt

  • Mixes incorporating RAP

  • Stone Matrix Asphalt (SMA) Mixes

  • Hot In Place Recycling

  • Cold In Place Recycling

  • Mix Design Verifications

Quality Control / Quality Assurance

  • AC Content and aggregate gradation

  • Marshall Properties

  • Superpave Volumetric Properties

  • Full Marshall Compliance

  • Full Superpave Compliance

  • Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage

  • Physical properties of asphalt aggregates

  • Draindown Characteristics

Mobile testing facility can be provided if required.

hot mix asphalt

Performance Graded Asphalt Cement Testing

  • Standard Practice for Accelerated Aging of Asphalt Binder Using a Pressurized Aging Vessel (PAV)

  • Standard Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)

  • Standard Test Method for Determining the Rheological Properties of Asphalt Binder Using a Dynamic Shear Rheometer (DSR)

  • Standard Test Method for Viscosity Determinations of Unfilled Asphalts Using the Brookfield Thermosel Apparatus

Recovered Penetration Testing


  • Recovery of Asphalt from Solution by Abson or Rotavapor

  • Penetration Graded Asphalt Cement Testing

  • Penetration of Bituminous Materials


Emulsions and Cutback Asphalt Testing


  • Penetration of Bituminous Materials

  • Solubility of Bituminous Materials in Trichloroethylene

  • Float of Bituminous Materials

  • Determination of Oil Portion of Distillate of Emulsified Asphalts

  • Viscosity of Emulsified Asphalts

  • Demulsibility of Emulsified Asphalts

  • Sieve Test for Emulsified Asphalts

  • High Float Emulsified Asphalt

asphalt binders

Aggregates – Low Complexity Testing

  • Materials Finer than 75 μm Sieve in Mineral Aggregates by Washing

  • Sieve Analysis of Aggregates

  • Percent Crushed Particles in Processed Coarse Aggregate

  • Amount of Asphalt-Coated Particles in Coarse Aggregate

Aggregates – High Complexity Testing

  • Relative Density and Absorption of Coarse and Fine Aggregates

  • Soundness of Aggregates by Use of Magnesium Sulphate

  • Percent Flat and Elongated Particles in Coarse Aggregate

  • Petrographic Analysis of Coarse and Fine Aggregates

  • Freezing and Thawing of Coarse Aggregate

  • Determination of Potential Alkali-Carbonate Reactivity of Carbonate Rocks by Chemical Composition

  • Percent Crushed Particles in Processed Coarse Aggregate

  • The Resistance of Coarse and Fine Aggregates Degradation by Micro-Deval Apparatus

  • Accelerated Detection of Potentially Deleterious Alkali-Silica Reactive Aggregate by Expansion of Mortar Bars

  • One Point Proctor Test 

  • Plastic Fines in Graded Aggregates and Soils by Use of the Sand Equivalent Test

  • Uncompacted Void Content of Fine Aggregate

Soil and Rock – Low Complexity Testing

  • Determination of Moisture Content of Soils

  • Determination of Particle Size Analysis of Soils

  • Liquid Limit, Plastic Limit and Plasticity Index of Soils

  • Determination of Specific Gravity of Soils

  • Moisture-Density Relationship of Soils by Proctor Method


  • Compressive Strength of Moulded Concrete Cylinders

  • Compressive Strength of High Performance Concrete Cylinders

  • Flexural Strength of Concrete Using Simple Beam with Third-Point Loading

  • Accelerated Cure and Compressive Strength of Concrete Cylinders 

  • Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete

  • Rapid Chloride Permeability

  • Non-Volatile Content of Chemical Admixtures, Latex Admixtures and Curing Compounds

  • Relative Density of Chemical Admixtures, Air Entraining Admixtures, Latex Admixtures and

  • Curing Compounds

  • pH of Aqueous Solutions by Glass Electrode

  • Testing of Flowable Grout (viscosity, bleeding, expansion and compressive strength)

  • Rapid freeze thaw testing (D line cracking)

  • Petrographic analysis

  • Evaluation of concrete aggregates, supplementary minerals and cement

  • Mix design for concrete, grout, shotcrete and mortars

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