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Geotechnical Laboratory Testing

Top-notch geotechnical engineering requires equally capable in-house testing facilities. In support of our geotechnical design and construction monitoring services, GeoStructures maintains an AASHTO-accredited geotechnical laboratory.

Keeping true to our commitment to excellence, we have invested in state-of-the-art, computer- controlled, servo hydraulic triaxial and Constant Rate of Strain (CRS) consolidation testing equipment. With the advent of CRS consolidation, we offer more accurate results than incremental consolidation, as well as reduced turnaround times of only 2 to 3 days— a dramatic reduction from the 2 weeks required for standard testing!

Specialized stress path triaxial testing makes it possible to consolidate soil specimens before shearing at conditions that model in-situ stresses, thereby improving the usefulness of such endeavors. Fully-trained staff engineers perform all of our testing, which includes, but is not limited to:

  • Index testing including gradation & hydrometer analysis, Atterberg limits, organic content, bulk density & dry density, and total and effective porosity
  • Compaction testing including standard & modified proctor testing
  • Consolidation testing including incremental 1-D consolidation, Constant Rate of Strain (CRS), 1-D swell, and Ko consolidation
  • Permeability testing including constant/falling head and triaxial permeability
  • Rock testing including unconfined strength and point load
  • Corrosion-related testing including resistivity, soil pH, and soil sulfates & chlorides concentration
  • Strength testing including triaxial compressions (UU, CU, CD, CKoU, & CKoD), direct shear, unconfined compression, California Bearing Ratio (CBR), and triaxial stress path & cyclic loading
  • Materials Finer than (No. 200) Sieve by washing
  • Sieve Analysis of Fine and Coarse Aggregates
  • Specific Gravity & Absorption of Fine Aggregates
  • Specific Gravity & Absorption of Coarse Aggregate
  • Moisture Content of Aggregate by Oven Drying
  • Organic Impurities in Fine Aggregates
  • Resistance to Abrasion by Abrasion and Impact in the L. A. Machine
  • Soundness of Aggregate by Sodium or Magnesium Sulfate

  For inquiries related to Geotechnical Laboratory Testing, please contact Ghaith AlHaik (

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