In-house laboratories yield test results you can trust
GROUND is Colorado’s premier construction materials testing laboratory. You can rely on our nationally accredited geotechnical and materials soils, concrete, asphalt, and masonry IN-HOUSE laboratories for fast, accurate results.
We continually invest in our laboratories to ensure that we’re meeting the needs of our clients.
Here are highlights – we invite you to call to learn more:
Accredited, so you can always trust the results
- AASHTO R-18
- US Army Corps of Engineers Validated
- CDOT Inspected
State-of-the-art equipment.
- In the early 2000’s GROUND was one of the first companies in the West to perform Resilient Modulus Testing, AASHTO T307, on soils and aggregates. GROUND has provided this testing for countless projects and several research projects over the years, most recently with CDOT and Colorado School of Mines.
- GROUND continues to invest in state-of-the-art equipment, including automated direct shear / residual shear testing systems from Geocomp and the latest kneading compactor from James Cox and Sons all housed in our new laboratory addition.
Extensive personnel certification and training
- Our lab staff are cross-trained and certified in multiple areas. Our current Commerce City lab management has a combined 75+ years of field and laboratory geotechnical testing experience.
Internal quality control
- GROUND maintains a rigorous internal QC program to ensure the most accurate results for our Clients. GROUND participates in the AASHTO ReSource Proficiency sample program, CDOT’s Round Robin testing program and regularly splits samples between our own laboratories to ensure testing accuracy.
Fully customizable on-site mobile laboratories
- GROUND owns a fleet of trailers that can be outfitted and delivered to your job site to meet all your onsite testing and concrete cylinder curing needs.
Lab Accreditation
The current scope of accreditation for each of our laboratory locations can be viewed by clicking the links below.
Laboratory Services We Offer
Asphalt
ASTM AASHTO Method D2041 T209 Theoretical Maximum Specific Gravity D6307-D5444 T308-T30 AC Content by Ignition Method and Extracted Gradation D2726 T166 Bulk Specific Gravity of Compacted Asphalt (Cores) D2726-d6925 T312-T166 Relative Density of Asphalt Specimens by Gyratory (Voids/VMA/VFA) D1560 T246 Resistance to Deformation and Cohesion of Asphalt (Hveem) D6307 T308 Asphalt Content by Ignition D4125 T287 Asphalt Content by Nuclear Method D6752 T331-T166 Bulk Specific Gravity of Compacted Asphalt by Vacuum Sealing D2726-D6752-D6925 T331-T312 Relative Density of Asphalt Specimens by Gyratory (Vacuum) D4867 T283 Resistance of Asphalt to Moisture-Induced Damage (Modified Lottman (TSR)) D6926-D6927 R68-T245 Sp.G.(SSD), Stability, Flow (Marshall) Concrete
ASTM AASHTO Method C39 T22 Concrete Compressive Strength C42 T24 Concrete Core Compressive Strength C42 T34 Shotcrete Cores Compressive Strength C157 T160 Length Change of Hardened Cement Mortar and Concrete C1074 - Maturity Meter Strength Correlation C39 T22 Concrete Compressive Strength Cylinders (Hi Strength) C780 T106 Gypcrete Compressive Strength C642 - Density, Absorption, and Voids in Concrete C78 T97 Concrete Third-Point Flexural Strength Beams C42 T34 Shotcrete Compressive Strength C496 T198 Splitting Tensile Strength of Concrete T358 - Surface Resistivity Indication of Concrete’s Ability to Resist Chloride Ion Penetration 
Soil Testing
ASTM AASHTO Method D698 T99 Standard Proctor Compaction D4318 T89-90 Liquid Limit, Plastic Limit, and Plasticity Index of Soils (Atterberg) D6913 - Partical-Size Distribution of Soils (Gradation) - - Denver Swell D2844 T190 Resistance R-Value and Expansion Pressure of Compacted Soils D1140 - No. 200 Wash (Soils) D422 T88 Particle-Size Analysis of Soils (Gradation and Hydrometer) D5102-D1633 - Unconfined Compressive Strength of Compacted Soil-Lime Mixtures D558 - Moisture-Density (Unit Weight) Relations of Soil-Cement Mixtures D7263 - Natural Density and Moisture Content G51 T289 pH Test D2434 T215 Hydraulic Conductivity of Coarse-Grained Soils D1557 T180 Modified Proctor Compaction D4546 T216 One-Dimensional Swell or Collapse of Soils D4829 - Expansion Index of Soils G187 T288 Soil Resistivity Using 2-Electrode Soil Box G57 - Soil Resistivity using the Wenner 4-Electrode Method - - Water-Soluble Sulfate Ion Content in Soil (CDOT Method) - - Water-Soluble Chloride Ion Content in Soil (CDOT Method) D3080 T236 Direct Shear under CD-Conditions D2974 T267 Organic Content D2435 - One-Dimensional Consolidation of Soils using Incremental Loading D4647 - Dispersive Clay Soils by the Pinhole Test D854 T100 Specific Gravity of Soil Solids by the Water Displacement Method D6572 - Crumb Test D2166 T208 Unconfined Compressive Strength of Soil D1883 T193 California Bearing Ratio-3 Point C1252 T304 Uncompacted Voids Test of Fine Aggregate D559 - Wetting and Drying Compacted Soil-Cement Mixtures D560 - Freezing and Thawing Compacted Soil-Cement Mixtures D2216 T255/265 Moisture Content of Soil/Aggregates - - Qualitative Sulfide Reactivity (AWWA) D4373 - Carbonate Content of Soils 
Aggregates
ASTM AASHTO Method C127 T85 Specific Gravity and Absorption of Coarse Aggregate C136 T27 Sieve Analysis of Aggregates C131 T96 Resistance to Degradation of Small Aggregate (LA Abrasion) C1260 - Potential ASR of Aggregate (Mortar-Bar Method) C88 T104 Soundness of Aggregate (Magnesium or Sodium Sulfate) C117 T11 No. 200 Wash (Aggregate) C128 T84 Specific Gravity and Absorption of Fine Aggregate D4253 & D4254 - Max/Min Index Density and Unit Wt of Soils (Relative Density) D2419 T176 Sand Equivalent C29 T19 Unit Weight & Voids in Aggregate C40 T21 Organic Impurities C142 T112 Clay Lumps and Friable Particles D4791 - Flat or Elongated Particles C1567 - Potential ASR of Combinations of Materials(Accelerated Mortar-Bar Method) D5821 T335 Fractured Particles in Coarse Aggregates C535 - Resistance to Degradation of Large Aggregate D6928 T327 Resistance of Coarse Aggregate to Degradation (Micro Deval) D7428 - Resistance of Fine Aggregate to Degradation (Micro Deval) Masonry
ASTM AASHTO Method C1019 - Masonry Grout Compressive Strength C1314 - Masonry Prism Compressive Strength C140 - Compressive Strength CMU/Brick Coupon C780 T106 Masonry Mortar Compressive Strength Specialty Testing
ASTM AASHTO Method D5334 - Thermal Conductivity (Geothermal) D5084 - Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall Permeameter D5298 T273 Measurement of Soil Water Potential Using Filter Paper D6836 - Measurement of Soil Water Potential using a Dew Point Potentiameter - T307 Resilient Modulus of Soils and Aggregates - - Soil Stabilization Mixture Analysis (Cement-Lime-Fly Ash) - - Concrete Mix Trials Other
ASTM AASHTO Method C123 T113 Lightweight Particles in Aggregate D5767 - Consolidated Undrained Triaxial Compression D2850 - Unconsolidated-Undrained Triaxial Compression - - Water Quality Analysis and Testing
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