Soils Laboratory
Soils Engineer - Mehdi Haeri
Soils Mechanics/Lab Engineer - "C.K." Su
Asst. Engineer/Training Coordinator - Jim Sawyer
The Soils Laboratory has the responsibility of providing soil design parameters, establishing acceptance criteria for materials and manufactured products, and ensuring that the acceptance criteria are met and will function as intended.
Acceptance Testing
Acceptance criteria for aggregate and soils are determined by performing the following tests:
- Sieve Analysis
- Liquid Limit
- Organic Content
- Hydrometer
- Plastic Limit
- pH Level of Soil
Performance Testing
Design parameter testing are provided to the Geotechnical, Hydraulic, and Pavement Designs Units of the Department by performing the following tests: · Triaxial
- Consolidation
- Resilent Modulus
- Erosion Rate Test
- California Bearing Ratio
- Direct Shear
- Soil/Aggregate Permeability
- Unconfined Compression Test for Chemical Stabilized Soil/Aggregate
Accreditation
The Soils Laboratory participates in the AASHTO Materials Reference Laboratory (AMRL) certification program, which implements rigorous requirement of technician competence and equipment precision. The Soils Laboratory is also responsible for the NCDOT QC/QA Program for the consulting Soils Laboratories. The Program holds high standards on the test qualify of consulting laboratories. Which are qualified to contracting NCDOT projects through the Program.
Training and Certification Program
The Field Section of the Soils Laboratory provides an extensive technician training and certification program for the Construction Unit, Maintenance Unit, Consultants, and Contractors including: · Aggregate Base Course Sampling
- Borrow Pit Sampling
- Conventional Density (density acceptance for soil)
- Nuclear Safety Hazardous Materials (NCDOT technicians only)
- QMS Nuclear Gauge Operator (density acceptance on asphalt)
- QC/QA Aggregate Sampling and Testing
- Chemically Stabilized Subgrade/Base QA
- Aggregate Base Course Nuclear Density Testing (course under development)
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NC DOT
NC DOH
NC GOV
