Certified Materials Testing Products offers standard sand and silica that are specially graded for ASTM tests and are naturally rounded silica sands of nearly pure quartz.
The Sand Cone Density Sand is clean, uniform, uncemented, and free flowing. The 20-30 Standard Sand is manufactured to pass 850µm sieve mesh (No.20) and be retained on 600µm sieve mesh (No.30). The Graded Standard Sand #30-#100 will pass between No.30 (600µm) and No.100 (150µm) sieves.
