Our laboratory is certified by the American Association of State Highway and Transportation Officials (AASHTO) and complies with internationally recognized ASTM standards.

The AASHTO accreditation program recognizes the competency of a testing laboratory in construction materials testing by assessing both the equipment and the staff’s abilities. The accreditation process is often long and arduous, however, Geotechnical & Environmental Services, Inc. (GES) has proudly been AASHTO certified for the last 20 years.

GES’ AASHTO accredited lab provides the following lab testing:

Soil Testing

• ASTM D421    Dry Preparation of Soil Samples
• ASTM D422    Particle Size Analysis of Soil
• ASTM D698    Laboratory Compaction of Soil Using a 5-lb. Rammer
• ASTM D854    Specific Gravity of Soil
• ASTM D1557  Laboratory Compaction of Soil Using a 10-lb. Rammer
• ASTM D2216  Laboratory Moisture Content of Soil & Rock
• ASTM D2217  Sampling for Test
• ASTM D2435  One-Dimensional Consolidation Properties of Soil Laboratory Determination of 
                          Moisture Content of Soil.
• ASTM 2487     Classification of Soils for Engineering Purposes
• ASTM D3080   Direct Shear Test of Soils Under Consolidated Drained Conditions
• ASTM D4318   Determining the Liquid Limit of Soil
• ASTM D4318   Plastic Limit of Soil
• ASTM D4643   Moisture Content of Soil by Microwave Oven Method
• ASTM D4959   Moisture Content of Soil by Direct Heating Method
• ASTM D5321   Determining the Coefficient of Soil by the Direct Shear
• ASTM D5333   Standard Test Method for Measurement of Collapse Potential of Soils
• ASTM D5607   Direct Shear Strength Tests of Rock Specimens
• ASTM G57       Field (and Lab) Measurement of Soil Resistivity Using the Wennar Four-Electrode
                          Method

Aggregate Testing

• ASTM C29      Unit Weight of Aggregate
• ASTM C40      Organic Impurities in Sands for Concrete
• ASTM C88      Soundness of Aggregates by Use of Sodium Sulfate or   Magnesium Sulfate
• ASTM C117    Amount of Material Finer 0.075-mm Sieve in   Aggregate
• ASTM C127    Specific Gravity and Absorption of Coarse Aggregate
• ASTM C128    Specific Gravity and Absorption of Fine Aggregate
• ASTM C136    Sieve Analysis of Fine and Coarse Aggregate
• ASTM C142    Clay Lumps and Friable Particles in Aggregate
• ASTM C535    L.A. Abrasion Test
• ASTM C566    Total Moisture Content of Aggregate by Drying
• ASTM C702    Reducing Field Samples of Aggregate to Testing Size
• ASTM C2419  Sand Equivalent Test
• ASTM C2844  R-Value Test
• ASTM D75      Standard Practice for Sampling Aggregates | Portland Cement Concrete Testing
• ASTM C617    Capping Cylindrical Concrete Specimens
• ASTM C1231  Use of Unbonded Caps for Concrete Cylinders

Masonry

• ASTM C109     Compressive Strength of Mortar
• ASTM C780     Evaluation of Mortar for Plain & Reinforced Unit   Masonry
• ASTM C942     Compressive Strength-Grouts-Preplaced Aggregate | Concrete
• ASTM C1019   Sampling and Testing of Grout

Asphalt Testing

• ASTM D1188  Bulk Specific Gravity of Compacted Bituminous Mixtures Using Paraffin-Coated
                          Specimens
• ASTM D1559  Resistance to Plastic Flow of Bituminous Mixtures Using Marshall Apparatus
• ASTM D2041  Maximum Specific Gravity of Bituminous Paving Mixture
• ASTM D2172  Quantitative Extraction of Bitumen from Bituminous Paving Mixtures
• ASTM D2726  Specific Gravity of Compacted Bituminous Mixtures
• ASTM D3203  Percent Air Voids in Paving Mixtures

Concrete

• ASTM C31    Making & Curing Concrete Test Specimens in the Field
• ASTM C39    Compressive Strength Cylindrical Concrete Specimens
• ASTM C42    Obtaining and Testing Drilled Cores of Concrete
• ASTM C138  Unit Weight, Yield, and Air Content of Concrete
• ASTM C143  Slump of Hydraulic Cement Concrete
• ASTM C172  Sampling Freshly Mixed Concrete
• ASTM C173  Air Content Freshly Mixed Concrete-Volumetric Method
• ASTM C192  Making & Curing Concrete Test Specimens in the Lab
• ASTM C495  Compressive Strength Lightweight Insulating Concrete