materialslab

ISI operates two Materials Testing Laboratories, located in Berkeley and Torrance, California. Testing is overseen by a professional registered engineer and conducted by certified laboratory technicians (NICET, ACI, CALTRANS). Our Torrance lab is AASHTO accredited and our Berkeley lab is accredited by numerous state and federal agencies including:

  • AMRL – AASHTO Materials Reference Laboratory
  • AASHTO – American Association of State and Highway Transportation Officials
  • CCRL – Cement and Concrete Reference Laboratory (through AASHTO)
  • ASTM – American Society for Testing and Materials (through AASHTO)
  • Caltrans – California Department of Transportation
  • DSA – Division of the State Architect
  • LEA – Laboratory Evaluation and Acceptance Program

These accreditations include on-site inspections of the laboratory, review of the lab quality control manual, lab equipment calibrations, maintenance schedules and lab testing procedures. The ISI laboratory also participates in reference sample programs for asphalt, concrete, soil and aggregate, administered by the above mentioned state and federal agencies. This program compares the quality of ISI test results with laboratories across the nation or state, depending on the certifying agency.

  • Equilibrium
  • Modulus of Elasticity
  • Dry Unit Weight
  • Shrinkage
  • Compression

 

  • Hveem (LTMD-Lab Test Maximum Density
  • S-Value (Stabilometer)
  • Marshall (Flow & Stability)
  • Rice (Theoretical Density)
  • Oil Content

 

  • Sulfate Soundness
  • Aggregate Qualification Testing
  • Specific Gravity of Aggregate
  • Percent Crushed Particles

 

  • R-value
  • Hydrometer
  • Specific Gravity
  • Compaction
  • Plasticity Index

 

  • Rebar (including couplers & welded bars) Tensile & Bend
  • Macroetching on welded coupons
  • High Strength Bolts