Sladden Materials Laboratory

Certified Excellence in Soil, Construction Materials, and Concrete Compression Testing for City of Los Angeles and Caltrans

Recognized by the City of Los Angeles and Caltrans as a trusted authority.

Sladden Engineering’s Materials Laboratory stands at the forefront of quality assurance, having earned prestigious certification as a testing agency for soils, construction materials, and concrete compression testing. Recognized by both the City of Los Angeles and the California Department of Transportation (Caltrans), our laboratory upholds rigorous standards to ensure precision and reliability in every test conducted. This certification underscores our commitment to excellence and positions us as a trusted partner for projects requiring the highest levels of material testing accuracy in both municipal and state contexts.
Sladden Engineering is constantly adding new test capabilities in its Material Laboratories. Please call one of the Beaumont Office for a current list of test capabilities.

We're Certified by Caltrans to Perform the Following Testing:

  • CT 105 Calculations Pertaining to Grading and Specific Gravities
  • CT 106 Definitions of Terms Relating to Specific Gravity
  • CT 125 Methods for Sampling Highway Materials and Products Used in the Roadway Structural Sections
  • CT 201 Method of Soil and Aggregate Sample Preparation
  • CT 202 Method of Tests for Sieve Analysis of Fine and Coarse Aggregates
  • CT 204 Method of Tests for Liquid Limit, Plastic Limit and Plasticity Index of Soils
  • CT 205 Method of Test for Determining Percentage of Crushed Particles
  • CT 206 Method of Test for Specific Gravity and Absorption of Coarse Aggregate
  • CT 207 Method of Test for Specific Gravity and Absorption of Fine Aggregate
  • CT 208 Method of Test for Apparent Specific Gravity of Fine Aggregate
  • CT 216 Method of Test for Relative Compaction of Untreated and Treated Soils and Aggregates
  • CT 217 Method of Test Sand Equivalent
  • CT 226 Method for Determining Moisture Content by Oven Drying
  • CT 231 method of Test for Relative Compaction of Untreated and Treated Soils and Aggregates by the Area Concept Utilizing Nuclear Gages
  • CT 234 Method of Test for Uncompacted Void Content of Fine Aggregate
  • CT 235 Method of Test for Percentage of Flat and Elongated Particles in Coarse Aggregate
  • CT 301 Method for Determining the Resistance “R” Value of Treated and Untreated Bases, Subbases, and Basement Soils by the Stabilometer
  • CT 304 Method of Preparation of Bituminous Mixtures for Testing
  • CT 308 Method of Test Bulk Specific Gravity and Density of Bituminous Mixtures
  • CT 309 Theoretical Maximum Specific Gravity and Density of Bituminous Paving Mixtures
  • CT 366 Method of Test for Stabilometer Value
  • CT 370 Method of Determining Moisture Content of Bituminous Mixtures or Graded Mineral Aggregates Using Microwave Ovens
  • CT 371 Method of Test for Resistance of Compacted Bituminous Mixture to Moisture Induced Damage
  • CT 382 Determination of Asphalt Binder Content of Bituminous Paving Mixtures by the Ignition Method
  • CT 521 Method of Test for Compressive Strength of Molded Concrete Cylinders
  • CT 539 Method of Test for Sampling Fresh Concrete