🔧 – Where to find it:
Need a reliable method for determining the particle size distribution of soils and aggregates?
⚠️ Avoid sketchy "free PDF" sites – many have missing tables or incorrect equations.
✅ Official: AASHTO Store (current, pay-per-download) ✅ Free: Some university repositories (older versions) ✅ Alternate: Check ASTM D1140 (similar wash sieve method)
Need the wash loss formula? I can share an example calc sheet. 👇
