DGMTS offer a wide range of laboratory testing services for concrete, soil, and asphalt.

Our laboratory is accredited by the American Association of State Highway and Transportation Officials (AASHTO) and we are a member of Washington Area Council of Engineering Laboratories, Inc. (WACEL).

Our Accreditation conforms to the requirements of ASTM D3740, ASTM E329, and AASHTO R-18.

We participate in both the AMRL and CCRL sample proficiency test programs for soil and concrete.

DGMTS also offer in-situ testing including field monitoring and testing of soil fill materials using the sand cone and nuclear gauge methods. We have capabilities of performing in-situ permeability tests using constant head permeability as wells as falling head permeability methods. We also provide PDA testing.

SOIL

Moisture Contents (ASTM D2216, AASHTO T265)*

Liquid and Plastic Limits and Plasticity Index (ASTM D3418, AASHTO T89, T90)*

Mechanical Analysis (ASTM D 422 and D1140)*

  1. Sieve Analysis (with grain-size curve-Including washing through No. 200 Sieve) (ASTM D6913, AASHTO T27)
  2. Hydrometer Analysis ( with grain size curve)- using assumed Specific Gravity (ASTM D7928, AASHTO T88)

Specific Gravity (AASHTO T 100)

Compaction Test, Standard Proctor (ASTM 698 or AASHTO T99)*

  1. Method A through D, VTM-1
  2. As Item A, single Point

Compaction Test, Modified Proctor (ASTM D 1557 or AASHTO T180)*

  1. Method A through D
  2. As Item A, single Point

California Bearing Ratio, (single point) 4 day Soaking Penetration (including Proctor and Classification)*

  1. ASTM D1883, AASHTO T193 or VTM-8)

Consolidation Test (ASTM D2435)-(Maximum 12 load increments)-one reload*

  1. Additional Increments per load and additional load-reload
  2. Time Compression Curve ( Maximum 12 Curves)
  3. Additional time Compression Curve, Per curve

Unconfined Compression Test Per soil (ASTM D2166), Peak only

Direct Shear Test (ASTM D3080), per vertical stress*

  1. Residual Direct Shear Test(COE 1110 Appendix D), per Vertical Stress

Orgonic Content and Moisture Content of Organic Soil (ASTM D2974)

USDA Texture Analysis

Shelby Tube Extraction

Lab pic 1

Lab pic 2

CONCRETE AND MASONARY

Compressive Strength of 4"x8" Concrete Cylinders (ASTM C39)*

Compressive Strength of 6"x12" Concrete Cylinders (ASTM C39)*

Compressive Strength of 2" Square Mortar or Grout Cubes (ASTM C109)

Core Density and Moisture Content

Compressive Strength of Masonry Prisms ( ASTM C1314)

Compressive Strength of Grout Prism (ASTM C1019)

Concrete Permeability for Chloride Ion (ASTM C1202, AASHTO T277)

Windsor Probe Mobilization/Demobilization (per Day)

Windsor Probe Testing (ASTM C-803 (per Test)

CONCRETE /ASPHALT CORING

Mobilization/De mobilization (per day) <=50 miles

Coring Labor( per day)

Concrete/asphalt (per hole)

Compressive Strength of Drilled Cores (including Sample Trimming and Preparation)

AGGREGATE

Material finer than No. 200 Sieve in Mineral Aggregates by Washing (ASTM C117, AASHTO T11)*

Sieve Analysis of Fine and Coarse Aggtregates (ASTM C136, AASHTO T27)*

Specific Gravity (Relative Density) and Absorption of Fine Aggregate (ASTM C127, C128; AASHTO T84, T85)*

ASPHALT

Bulk Density (Cores) (ASTM D2726, AASHTO T166)

Maximum Specific Gravity of Hot Mix Asphalt Paving Mixtures (ASTM D2041, AASHTO T209)

Moisture Content of HMA by Oven (ASHTO T329)

Bulk Specific Gracity using Vacuum Sealing Method (ASTM D6752, AASHTO T331)

Thickness or Height of Compacted Specimens (ASTM D3549)

Asphalt Extraction & Gradation (ASTM D2172, D5444 / AASHTO T164, T30)

ROCKS

Unconfined Compression Test for Rock (ASTM D7012), Peak only

Slake Durability of Shales and Other Similar Weak Rocks (ASTM D4644)

* DGMTS Lab is certified and accredited by AASHTO to perform the test