I can’t directly provide or link to a PDF copy of Asphalt Institute MS-26, as that would likely violate copyright. However, I can give you useful information about it.

MS-26: The Asphalt Binder Handbook is a key publication from the Asphalt Institute. Here’s what you should know:

• Full Title: MS-26 Asphalt Binder Handbook
• Purpose: Provides comprehensive information on asphalt binders (bitumen), including specification testing, selection, storage, handling, and performance grading (PG) per AASHTO M320.
• Key Contents:
  • Binder chemistry and properties
  • Superpave performance grading system
  • Tests for rutting, fatigue cracking, low-temperature cracking
  • Modified binders (polymer, rubber, etc.)
  • Aging, adhesion, and rheology
  • Binder selection guidelines
• Target Audience: Pavement engineers, materials specifiers, lab technicians, and quality control personnel.
• Status: Often used alongside MS-2 (Asphalt Mix Design Methods) and MS-4 (The Asphalt Handbook).

Possible Contents of MS-26

While I don't have the specific content of MS-26, Asphalt Institute publications typically cover a range of topics, including:

• Asphalt Materials: Specifications and properties of asphalt materials used in construction.
• Pavement Design: Guidelines and standards for designing asphalt pavements.
• Construction Practices: Best practices for the construction of asphalt pavements, including laying, compaction, and finishing.
• Maintenance and Rehabilitation: Strategies for maintaining and rehabilitating asphalt pavements.

What is MS-26?

Unlike the famous MS-2 (Mix Design Methods) which focuses on asphalt mixtures, MS-26 is entirely dedicated to the binder itself. It covers the chemistry, testing, grading (PG, Performance Grade), rheology, and storage of asphalt cement, modified binders, and emulsions.

4. Modified Asphalt Binders

As polymer-modified asphalts (PMA) became standard for high-traffic roads, the original PG system required updates. MS-26 addresses the challenges of testing modified binders, including the use of the Multiple Stress Creep Recovery (MSCR) test, which is better suited for detecting the elastic recovery properties of polymers than standard DSR tests.

The Future of Asphalt Pavement Design

The Asphalt Institute MS-26 PDF remains relevant, but the industry is shifting. The 10th Edition (rumored for late 2020s) will likely:

• Fully embrace the AASHTOWare Pavement ME Design software.
• Include perpetual pavement design concepts.
• Address recycled materials (RAP, RAS, shingles) in thickness calculations.
• Integrate life-cycle assessment (LCA) for carbon footprint.

Until then, the current 9th Edition PDF is your most authoritative guide.