Soil Inspections and Testing

Craig Testing Laboratories, Inc. offers a very wide range of soils inspections, investigations and laboratory analysis. They range from onsite inspections to in-house analysis of soil and rock materials.

Projects usually begin with Craig Test Boring Company performing the soil borings and the engineering division providing the geotechnical recommendations for foundation construction.

When the project is designed for footing excavation, we supply a field technician to observe the excavation, enforce the recommendations of the geotechnical report and ensure stability.

If the project requires additional fill materials, we can witness the placement and compaction of each lift of fill material and test its density (compaction) utilizing one of our 29 nuclear densometers. A densometer is a device, powered by a small amount of radiation, used to measure the density of the soil. We compare the in-place density to the maximum density obtained in the laboratory that allows us to determine the in place percent of compaction.

2006-1018

Field Soil Inspections

  • Compaction testing of fill materials
  • Foundation inspection and testing
  • Bearing testing
  • California Bearing Ratio testing (Field)
  • Settlement monitoring

Laboratory Analysis & Tests

  • Gradation analysis (Soil & Rock)
  • Grain size analysis (Hydrometer)
  • Permeability/Compaction testing
  • Minimum/Maximum Density and Optimum Moisture Determination
  • California Bearing Ratio (Lab)
  • Los Angeles Abrasion test
  • Specific gravity (Fine/Course aggregates)
  • Atterberg Limits (Plasticity)
  • Topsoil analysis (pH, organic, chemical)

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