EBA Engineering Laboratory

EBA maintains and operates a laboratory that is equipped for the testing of soil, rock, aggregates, hot mix asphalt, portland cement concrete, mortar, brick, and concrete masonry units. The laboratory has been accredited by AASHTO since 1993. The AASHTO accreditation program involves regular reviews and inspections of the laboratory by the AASHTO Materials Reference Laboratory (AMRL) and the Cement and Concrete Reference Laboratory (CCRL) as well as a proficiency sample program to monitor the quality of the test results. The laboratory meets the requirements of AASHTO R-18, which provides criteria and guidelines for establishing and implementing a quality management system for materials testing laboratories. The laboratory is certified for a number of tests including the following:

Soils:

Particle Size Analysis of Soils (ASTM D 422)
Shrinkage Factors of Soils (ASTM D 427)
Laboratory Compaction Characteristics of Soil Using Standard Effort (ASTM D 698)
Specific Gravity of Soil (ASTM D 854)
Amount of Material in Soils Finer than No. 200 Sieve (ASTM D 1140)
Laboratory Compaction Characteristics of Soil Using Modified Effort (ASTM D 1557)
CBR (California Bearing Ratio) of Laboratory Compacted Soils (ASTM D 1883)
Unconfined Compressive Strength of Cohesive Soil (ASTM D 2166)
Laboratory Determination of Water (Moisture) Content of Soil and Rock (ASTM D 2216)
One Dimensional Consolidation Properties of Soils (ASTM D 2435)
Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils (ASTM D 2850)
Density of Soil and Soil-Aggregate in Place by Nuclear Methods (ASTM D 2922)
Water Content of Soil and Rock in Place by Nuclear Methods (ASTM D 3017)
Liquid Limit, Plastic Limit, and Plasticity Index of Soils (ASTM D 4318)
Consolidated Undrained Triaxial Compression Test for Cohesive Soils (ASTM D 4767)
Measurement of Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall Permeameter (ASTM D 5084)

Aggregates:

Materials Finer than No. 200 Sieve in Mineral Aggregates by Washing (ASTM C 117)
Density, Specific Gravity and Absorption of Coarse Aggregate (ASTM C 127)
Density, Specific Gravity and Absorption of Fine Aggregate (ASTM C 128)
Sieve Analysis of Fine and Coarse Aggregates (ASTM C 136)
Total Evaporable Moisture Content of Aggregate by Drying (ASTM C 566)

Concrete:

Making and Curing Concrete Test Specimens in the Field (ASTM C 31)
Compressive Strength of Cylindrical Concrete Specimens (ASTM C 39)
Density (Unit Weight), Yield, and Air Content of Concrete (ASTM C 138)
Slump of Hydraulic-Cement Concrete (ASTM C 143)
Air Content of Freshly Mixed Concrete by the Volumetric Method (ASTM C 173)
Air Content of Freshly Mixed Concrete by the Pressure Method (ASTM C 231)
Temperature of Freshly Mixed Hydraulic-Cement Concrete (ASTM C 1064)

Mr. Steve Diggins, PE is responsible for the operation of the Laboratory Testing Division and can be reached at steve@ebaengineering.com