Laboratory Testing

Laboratory Testing

ALLWEST can provide cost effective quality control/quality assurance services to meet our clients’ needs. We are proud of our laboratory staff’s ability to produce accurate, representative test results in a timely manner. ALLWEST maintains national accreditation in our Spokane Valley, Washington office from the Washington Association of Building Officials (WABO), and in our Hayden and Lewiston, Idaho offices through AASHTO Materials Reference Laboratory for a wide variety of construction materials testing procedures (

ALLWEST also maintains an accreditation from the Idaho Transportation Department (ITD – Lewiston and Hayden, Idaho). In addition, ALLWEST has an up-to-date laboratory trailer for testing at remote projects. Our trailer is certified by ITD and is set-up for testing during crusher control, soils, and asphalt.

The following tests are performed in-house to ensure accurate results. ALLWEST also has long standing relationships with reliable laboratories for specialized testing services not listed.


  • Aggregate pH
  • Clay Lumps & Friable Particles
  • Cleanliness Value
  • Crusher Control
  • Ethylene Glycol
  • DMSO
  • Deleterious Substance
  • Dry Rodded Weight
  • Durability Index (Coarse & Fine)
  • Fine Angularity
  • Flat & Elongated Particles
  • Fracture Face
  • Idaho Degradation
  • Lightweight Particles
  • L.A. Abrasion
  • Organic Impurities
  • Sand Equivalent
  • Sieve Analysis
  • Specific Gravity (Coarse & Fine)
  • Spring Loaded Proctor
  • Sulphate Soundness (Coarse & Fine)
  • Source Investigation
  • Unit Weight
  • Washington Degradation


  • Core Density
  • Extraction with Gradation
  • Extraction (Oil Content)
  • Reflux Extraction with Gradation
  • Theoretical Maximum Density
  • Gyratory/Volumetrics
  • Superpave Testing


  • Absorption
  • Block Shrinkage
  • Compressive Strength:
    Mortar, Grout, Brick & Block


  • Atterberg Limits
  • California Bearing Ratio (CBR)
  • Chlorides & Sulfates
  • Consolidation Testing
  • Grain Size Analysis
  • Liquid Limits/Plastic Limit
  • Organic Content
  • Moisture Density Curve (Proctor)
  • Resistivity
  • Specific Gravity
  • Unit Weight/Moisture Content
  • Unconfined Compression
  • Hydrometer Analysis


  • Compressive Strength
  • Mix Design Verifications
  • Unit Weight/Yield