Materials Testing

Materials Testing


NTI maintains the only full-time materials testing laboratory on the North Olympic Peninsula.  Soil compaction, sieve analysis, concrete compressive strength, and other construction related quality control and performance tests are available.

Concrete, Grout & Masonry Testing

    • Compressive Strenth Testing
    • Mix Design and Placement
    • Slump Test of Concrete
    • Air Entrainment Content by Pressure
    • Weight & Volume

Soils & Aggregates

    • Moisture Density Relationship (Proctor)
    • Classification of Soils
    • Liquid Limits, Plastic Limits and Plasticity Index
    • Wet and Dry Gradation Sieve Analysis
    • Sand Equivalency Value
    • Fractured Particle Determination
    • Specific Gravity of Soils

Special Inspection

  • Structural Steel/ Rebar Inspection
  • High Strength Bolting
  • Compaction Testing using Nuclear Densometer
  • Welding Inspection
  • Epoxy Dowel Installation Inspection
  • Detention Basin Monitoring
  • QA/ QC Construction Monitoring and Inspection