Programs that work for you

The AASHTO Accreditation Program has released a new policy and guidance document. The "AASHTO T152 and ASTM C231: Aggregate Correction Factors for Concrete Air Content Determinations Using Pressure Meters" clarifies how laboratories should determine and apply the aggregate correction factor required by AASHTO T 152 and ASTM C231. It outlines AASHTO Accreditation Program expectations for compliant practice and resolving related nonconformities. Until updates are made within ASTM C231, this document serves as the essential reference for accredited laboratories.

The newly redesigned AAP Procedures Manual presents the requirements of the AASHTO Accreditation Program in a new format that is easier to read and understand. This new version integrates the old procedures manual with the newer policy and guidance documents that AASHTO re:source had been issuing on its website. It also includes helpful links that can take the reader to other documents or websites to learn more.

The AASHTO Accreditation Program has clarified its suspension policy regarding consecutive low ratings when current round ratings are suppressed. For example, since ratings for the 2025 Hot Mix Gyratory Proficiency Samples were suppressed, the 2024 and 2026 results will be used to determine any potential suspensions.

We are currently preparing the 2026 Proficiency Sample billing cycle. To streamline the invoicing process and ensure customers receive an accurate invoice, we are asking customers to review their laboratory’s proficiency sample subscription and make any necessary changes by August 15, 2025.

The AASHTOresource.org website will be taken offline Friday, April 11 at 5:00 p.m. EDT. We will be migrating our systems to a new data center over the weekend. We expect to restore service on Monday, April 14 at around 10:00 a.m. EDT. If this timeframe is extended, updated information will be provided on a temporary page at AASHTOresource.org.

We have discovered that some testing laboratories have sought laboratory accreditation for facilities that primarily serve as sample transfer depots rather than fully-operational testing laboratories. AASHTO Accreditation is strictly reserved for testing laboratories and does not extend to sample transfer depots. The AASHTO Accreditation Program (AAP) has been actively identifying and removing such facilities from the program as they are discovered.

The AASHTO Accreditation Program (AAP) has released the following policy document: AASHTO Accreditation Policy and Guidance on Masonry Unit and Prism Testing. This policy is based on the requirements of ASTM C1716/C1716M-24, ASTM C140/C140M-24, and ASTM C1314-23b.

Starting October 2, 2024, customers will no longer be able to request AASHTO re:source on-site assessments for E329 (Steel Inspection); however, the laboratories currently accredited for this standard will continue to maintain accreditation until their next AASHTO re:source on-site assessments have been fully processed.

Use this table as the first step when searching for a technician certification program that meets your laboratory’s needs and for confirmation that a certification program meets the requirements specified in ASTM Quality Management System standards.​

Effective July 1st, 2024, as part of our commitment to maintaining high standards and ensuring the program’s sustainability, we are implementing changes to the annual AASHTO Accreditation Program fees.

Registration and enrollment is now open for these new proficiency sample programs: Asphalt Mixture Hamburg Wheel Track (HWT) and Winter Maintenance Products (WMP)!

In collaboration with the California Division of the State Architect (DSA), we have developed an on-site evaluation program for laboratories providing special inspection and/or structural testing services to the DSA. The Special Inspection Program (SIP) is specifically for laboratories seeking to meet or maintain DSA’s Laboratory Evaluation and Acceptance (LEA) program requirements.

The AASHTO Accreditation and Laboratory Assessment Programs have removed the following metal tests from their scopes.

We are pleased to announce that our website is back up and running. It has been a challenging month involving a cyber incident impacting our web hosting company. Please review the details regarding logging into your account and extended deadlines.

In 2023 the following changes were made to the AASHTO Accreditation Policy and Guidance on Prerequisites for Accreditation.

Starting January 2024, as part of the Annual Review process, the AASHTO Accreditation Program will carry out a review of every AASHTO Accredited laboratory’s website to verify that the language and logos used are in conformance with the AASHTO Accreditation Policy on Publicizing Accreditation.

The following has been added to our False Claims of Accreditation page. Please visit that page for a current list of any known false claims of AASHTO Accreditation.

Effective January 1, 2024, the AASHTO re:source Laboratory Assessment Program (LAP) will implement a new hourly-rate fee structure for on-site assessments. This replaces the current half-day fee structure and is a more accurate and fair representation of our staff's time spent at your laboratory. This change was made in part due to feedback received from customers on potential inaccuracies of the half-day fee structure.

The following has been added to our False Claims of Accreditation page. Please visit that page for a current list of any known false claims of AASHTO Accreditation.

Monday, July 31, 2023, AASHTO released the Standard Specifications for Transportation Materials and Methods of Sampling and Testing, and AASHTO Provisional Standards, 43rd Edition—2023 (the “Materials Standards”).