Tri-State Asphalt first lab accredited by AASHTO for pavement preservation standards

Updated May 10, 2016
Tri-State Asphalt management (left to right) Todd Weist, Lorraine Heffner, Cody Weist, and Randall MillerTri-State Asphalt management (left to right) Todd Weist, Lorraine Heffner, Cody Weist, and Randall Miller

The American Association of State Highway and Transportation Officials’ (AASHTO) has accredited Tri-State Asphalt for micro-surfacing and slurry pavement preservation mix design testing.

The Morris, Illinois-based firm is the first in the U.S. to receive such accreditation for pavement preservation standards.

“Tri-State built its foundation from two main principles: high quality products and superior customer service,” says owner Todd Weist. “An accreditation like this is an important step forward in the evolution of our company and products as we continue to be leaders in the industry.”

AASHTO’s Material Reference Laboratory (AMRL) verifies facilities for the AASHTO Accreditation Program (AAP), which was created in 1988 to “formally” recognize the “competence” of testing labs working on specific tests on construction materials.

AMRL, AASHTO says, provides administrative coordination and technical support for the AAP, which accredits more than 650 AASHTO, American Society for Testing and Materials (ASTM), as well as state standards.

The International Slurry Surfacing Association (ISSA) says agencies are seeking top-notch pavement preservation technologies that meet their needs. “They want confirmation that the products for which they are paying are designed by qualified laboratories,” ISSA says.

”Tri-State being the first lab in the country for micro-surfacing and slurry seal mix design process, is now able to supply that credibility thanks to the lab assessment program developed by AMRL,” the company says.

Tri-State Asphalt has been accredited for its quality management system and asphalt binder since Dec. 12, 2011, according to AMRL’s directory of AASHTO Accredited Testing and Inspection Agencies. The most recent accreditation includes aggregate in addition to pavement preservation. These include:

  • Pavement Preservation – accredited since 5/2/2016
    TB-100, TB-106, TB-109, TB-113, TB-114, TB-139, TB-144, TB-147, D3910, D6372, D3910/D6372
  • Aggregate – accredited since 5/2/2016
    T11 (Fine Aggregate), T19, T27 (Fine Aggregate), T176, T255, C29, C117 (Fine Aggregate), C136 (Fine Aggregate), C566, D2419