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.
Best practices for storing binders to prevent oxidation and viscosity changes. asphalt institute ms-26 pdf
The Asphalt Binder Handbook is structured to take the reader from the fundamental science of liquid asphalt to its advanced engineering applications. Here are the primary pillars of the manual: 1. Nature and Chemistry of Asphalt Binders The Asphalt Binder Handbook is structured to take
): Indicates how much the binder permanently deforms under repeated loads. A lower Jnrcap J sub n r end-sub signifies better rutting resistance. A lower Jnrcap J sub n r end-sub
Measures the low-temperature stiffness and relaxation properties to evaluate resistance to thermal cracking.
It synthesizes information from various Asphalt Institute publications (including MS-4, MS-5, MS-19, and SP-1) and contains specialized information on modern testing techniques. Key Topics Covered in MS-26 (3rd Edition)
The handbook also examines the use of asphalt binders in emulsions and cutbacks, discussing the types, tests, and specifications for these products. It also touches on air-blown asphalts used in the roofing industry.