Juneau Materials Testing Laboratory and Special Inspections

RESPEC’s Materials Testing Laboratory in Juneau, Alaska, provides full-service soils, asphalt, and concrete testing in accordance with American Association of State Highway and Transportation Officials (AASHTO), ASTM, and Alaska Department of Transportation & Public Facilities (DOT&PF) standards using state-of-the-art equipment. Laboratory technicians are American Concrete Institute (ACI) and Western Alliance for Quality Transportation Construction (WAQTC) certified and familiar with the latest construction materials, methods, equipment, and other technological innovations. Our Materials Testing Laboratory offers a monitored, secure, and environmentally controlled setting to ensure accurate data when preparing and testing samples.

RESPEC’s specialized testing capabilities are here to meet the unique needs of our clients throughout the Southeast and the remainder of Alaska, which include government agencies, contractors, the mining industry, developers, and architectural and engineering firms.

We are also International Code Council (ICC) certified to provide on-site special inspections and material specification-conformance (quality assurance/quality control) testing during project construction and engineering data needed to support your project design. Construction materials testing and special inspections ensure that your project meets International Building Code (IBC) requirements and is built per plan and with quality materials. A thorough understanding of sampling techniques, testing procedures, verification procedures, and the application of various building materials is just a small portion of our expertise that contributes to the success of your project.

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  • Maximum Density Index (Proctor) – AASHTO T99/T180
  • Sieve Analysis of Aggregates (incl. wash/moist.) – ASTM C136 / AASHTO T27
  • Materials Finer Than #200 by Washing – ASTM C117 / AASHTO T11
  • Field Density Testing, Nuclear Method – AASHTO T310
  • Specific Gravity & Absorption, F.A. – ASTM C128 / AASHTO T84
  • Specific Gravity & Absorption, C.A. – ASTM C127 / AASHTO T85
  • Moisture Content of Aggregates – ASTM C566 / AASHTO T255
  • Degradation of Aggregates – ATM 313
  • L.A. Abrasion – ASTM C131 / ASTM C535 / AASHTO T96
  • Fractured Particles of Coarse Aggregate #4 – AASHTO TP61
  • Fractured Particles of Coarse Aggregate #10 – AASHTO TP61
  • Sodium Sulfate Soundness (5 cycles) – ASTM C88 / AASHTO T104
  • Flat & Elongated particles – ATM 306
  • Clay Lumps & Friable Particles – ASTM C142 / AASHTO T112
  • Unit Weight (dry loose & dry rodded) – ASTM C29 / AASHTO T19
  • Asphalt Content Ignition Oven Method – AASHTO T308
  • Gradation of Extracted Materials – AASHTO T30
  • Density of Compacted Bituminous Mixtures – Saturated surface-dry specimens – ASTM D2726 / AASHTO T166 / ATM 410
  • Density of Compacted Bituminous Mixtures – In-place by nuclear method – WAQTC TM8
  • Maximum Theoretical Sp. Gr. (Rice) and Density of Paving Mixtures – ASTM D2041 / AASHTO T209
  • Compressive Strength 4”x8” (intake, cure, break, report & disposal) – ASTM C39
  • Compressive Strength Hold Cylinders – ASTM C31
  • Compressive Strength 2”x2” (mortar cubes) – ASTM C109
  • Field Control Tests of Fresh Concrete – Sample, Temperature, Slump, Air Entrainment, Unit Weight, Casting Strength Specimens – ASTM C172 / ASTM C1064 / ASTM C143 / ASTM C231 / ASTM C138 / ASTM C31
  • Casting 2×2 Mortar Cubes for Strength Testing – AASHTO T106
  • Sulfur Capping of Specimens – ASTM C617
  • Sieve analysis of soil (1” minus material) – AASHTO T27
  • Atterberg Limits (LL, PL, PI) – ASTM D4318 / AASHTO T89 T90
  • Specific Gravity of soils – ASTM D854 / AASHTO T100
  • Moisture Content – ASTM D2216 / AASHTO T265
  • Organic Content by Ignition – ATM T203 / AASHTO T267
  • Classification by Unified Soil System – ASTM D2487
  • pH Determination – AASHTO T289 / ASTM D4972


  • Verification of Existing Soils
  • Verification of Subbase Material, Lift Thickness, Compaction Methods, and Density Testing
  • Reinforcing Steel Inspection
  • Verification of Concrete Mix Design
  • Concrete Field Sampling
  • Concrete Compression Strength Testing
  • Verification of Embedded Bolts, Plates and Post Installed Anchors
  • Inspect High Load Diaphragms
  • Structural Streel Inspection: Bolting and Welding
  • Provide Detailed and Timely Inspection Reports
  • Furnish a Final Statement of Inspection

Alaska-based Materials Testing

Alaska-based Inspection Services

Alaska-based Materials Testing

To assist our team of engineers during the geotechnical design phases of your project, our Juneau soils and construction materials laboratory provides full- service soils, asphalt, concrete, and masonry testing in accordance with ASTM, AASHTO, and ADOT&PF standards using state-of-the art equipment.

Alaska-based Inspection Services

Our service capabilities include:

On-site construction inspection
Concrete: Batch Plant, Pre-stress/Post Tension, Concrete Field Sampling
Structural Steel: Bolting, Erection, Welding
Asphalt: Hot Asphalt Pavement Laydown Inspection