materials testing

Our laboratory is accredited by the American Association of State and Highway Transportation Officials (AASHTO).  Obtaining and maintaining an AASHTO accreditation requires us to retain qualified staff, participate in proficiency sample programs, maintain calibration and update training records. Accreditation also requires successful completion of annual onsite inspections from the AASHTO Materials Reference Laboratory (AMRL) and Cement and Concrete Reference Laboratory (CCRL). Our laboratory is also validated by the U.S. Army Corps of Engineers. We provide specialized and basic testing of soils, concrete, and asphalt.  The laboratory and field testing is performed in accordance with each project’s specified test methods.


Sieve Analysis

Hydrometer Analysis

Specific Gravity of Soils

Maximum Density of Soil (Proctor & Vibratory)

Organic Content in Soils by Loss on Ignition

Plasticity Index (Atterberg Limits)


Ethylene Glycol 

Bulk Density & Voids

Sulfate Soundness

L.A. Abrasion

Uncompacted Voids

Sand Equivalent

Aggregate Durability Index

Flat & Elongated

Fracture Count

Crusher Control


Bulk Specific Gravity (core)

Oil Content by Nuclear Method

Oil Content with Sieve Analysis (Ignition Oven)

Marshall Density

Maximum Theoretical Density (Rice)

Mix Design

Oil Content with Sieve Analysis (Quantitative Extraction) 

concrete & masonry

Compressive Strength Masonry Units

Compressive Strength Grout

Compressive Strength

Concrete Flexural Strength

Mix Design