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Soil, Rock & Overburden Analysis

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Sample Preparation

Geotechnical Analysis

Soil, Rock & Overburden Analysis Saturated Paste and Paste Extract Preparation
    Soluble Constituents
      Electrical Conductivity
      Sodium Absorption Ratio
      Total Dissolved Solids
Acid Soluble Iron
Acid Soluble Manganese
Acid-Base Account
Boron (Hot Water Soluble)
Carbonate Content/Inorganic Carbon (Coulometric)
Cation Exchange Capacity (USDA)
Cation Exchange Capacity (Sum of Bases)
Exchangeable Cations (Ca, Mg, Na, K)
Exchangeable Acidity
Exchangeable Metals
Micronutrients, DTPA Extraction
Neutralization Potential
Organic Carbon (Walkley Black)
Organic Matter (Titration or Ignition)
pH (1.1 Water)
pH (SMP Buffer)
Phosphorus (P-1 or P-2)
Potassium (1N Ammonium Acetate)
Specific Gravity (Particle Density)
Sulfur (Pyritic)
Sulfur (Sulfate)
Sulfur (Total)
Texture (Sand, Silt, Clay by Hydrometer)
Texture (Sand, Silt, Clay by Pipette)
Coarse Material Greater than 2mm
Trace Elements
Uniaxial Compression (ASTM D2938-68, ISRM)
Triaxial Compression (ASTM D2664-86, ISRM)
    Confining Pressure – (Up To 10,000 PSI On 2.5”, 2.155”, 2.000”, & 1.875”)
    Confining Pressure – (Up To 5,000 PSI On 3”)
Compression Prep (ASTM D4543-85 Modified - Total Parallelism)
Axial Young’s Modulus (ASTM D3148-86)
Lateral Young’s Modulus (ASTM D3148-86)
Poisson’s Ratio (ASTM D3148-86)
Sonic Velocities (ASTM D2845-90, ISRM)
Sonic Poisson’s Ratio (ASTM D2845-90)
Sonic Modulus (ASTM D2845-90)
Water Content (ASTM D2216)
Bulk Density (ISRM)
Atterberg Limits (ASTM D4318-84)
Indirect Tensile (ASTM D3967-86, ISRM)(Brazilian 0.5:1 Length-To-Diameter)
Slake Durability (ASTM D4644-87, ISRM - Two Cycles)
Swelling Strain (ISRM - 24 Hours)
3-Point Flexural Strength (Needs At Least 6” Core)
Shear Strength

Geotechnical Testing is performed in compliance with either the American Society for Testing and Materials (ASTM) or the International Society for Rock Mechanics (ISRM), as appropriate. Our laboratory uses state-of-the-art equipment with documented calibration such as in-house Moorehouse Compression Rings for calibration of load cells.

If the length-to-diameter ratio (L/D) for the Uniaxial Compressive Sample is less than 2.0, the strength will be corrected according to ASTM D2938-86. Uniaxial Compressive Strength on coal samples is normally performed on a 1:1 L/D ratio or corrected to a 1:1 basis.


Geotechnical Services
(PDF, 25KB)

Soil & Overburden Analysis
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