Density sand is used for sand cone density testing of soils is clean, uniform, uncemented and free-flowing, and meets ASTM D1556 and AASHTO T 191. Few particles pass No.200 (75μm) or are retained on No.10 (2.00mm) sieves. Uniformity coefficient less than 2.0, and less than 3% passes No.60 (250µm). Bulk density varies less than 1%.