ASTM D 5644 - 01 (Reapproved 2013) Standard Test Methods for Rubber Compounding Materials - Determination of Particle Size Distribution of Recycled Vulcanizate Particulate Rubber

Current edition approved Nov. 1, 2013. Published January 2014. Originally approved in 1994. Last previous edition approved in 2008 as D5644 – 01 (2008)ε1. — 4 p.
These test methods describe the procedures for determining average particle size distribution of recycled vulcanizate particulate.
Method A describes the Ro-tap sieve test method for 60 mesh or coarser particles.
Method B describes the ultrasonic technique combined with optical microscope especially suitable for 80 mesh or finer particles. This procedure is based on Test Method D3849.