Once you secure your legitimate MS-26 PDF, you need to use it properly. The manual is dense; here is the roadmap for the verified user:
A: The 6th edition (2001) still uses some obsolete AASHTO T-series tests. The 7th edition (2015/2020) harmonizes with AASHTO R 35 (Superpave Volumetric Mix Design) and includes updated gyratory compaction angles (1.16 degrees versus older 1.25 degrees).
Because the Asphalt Institute is a non-profit industry association that funds research and education through these sales, downloading illegal copies undermines the industry. asphalt+institute+ms26+pdf+verified
Reliable Sources:
Open the PDF and locate the Library of Congress Cataloging-in-Publication Data page. The correct 7th Edition will state: Once you secure your legitimate MS-26 PDF, you
“Copyright © 2015 by The Asphalt Institute. Revised 2018, 2020.”
Some state DOTs and university libraries hold the official CD-ROM version of MS-26. You can check out the disc and create a personal backup—but ALWAYS verify the hash checksum against the Asphalt Institute’s published MD5 checksum. “Copyright © 2015 by The Asphalt Institute
To get a verified PDF of Asphalt Institute MS-26:
No free version is verified by the Asphalt Institute. If you see a “free PDF,” assume it is unauthorized and potentially outdated or corrupted.
The most current edition is MS-26, 4th Edition (2015). Earlier editions (1st–3rd) are obsolete due to significant changes in Superpave PG grading, MSCR test adoption, and modified binder specifications.