Laboratory Testing Services

EEI’s laboratories are equipped to evaluate the engineering characteristics of substrata and construction materials. As a testament of our commitment to quality testing services, we have been accredited by the AASHTO in soil, aggregate, asphalt and concrete testing. A partial listing of our testing capabilities is listed below:


  • Unconfined compression
  • Grain size analysis
  • Wet and dry unit weight
  • Permeability (falling and constant head)
  • Natural moisture content
  • One-dimensional consolidation
  • Atterberg limits
  • Shrink-swell behavior
  • Triaxial shear (CU, CD & UU)
  • Specific gravity
  • Resistivity (Lab & Field)
  • Moisture-Density Relations
  • Water soluble sulfate
  • Loss on ignition (organic content)

Portland Cement & Concrete Aggregates

  • Compressive strength
  • Specific gravity
  • Flexural strength
  • Sodium sulfate soundness
  • Particle size analysis
  • Unit weight

Asphaltic Concrete

  • Marshall stability, flow and density
  • Extraction analysis
  • Aggregate gradation