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Anthracite Building

Technical Information

Typical Sieve Analysis of CEI Anthracite
Grade No. LFM 1.3
US Std. Sieve Nominal Opening Calibrated Opening Percent Passing
#10 2.00 mm 2.050 mm 100.0
#12 1.70 mm 1.738 mm 100.0
#14 1.40 mm 1.425 mm 87.3
#16 1.18 mm 1.202 mm 49.3
#18 1.00 mm 1.005 mm 12.2
#20 0.85 mm 0.878 mm 1.3
#25 0.71 mm 0.701 mm 0.3
#30 0.60 mm 0.597 mm 0.2
Effective Size: 0.99 mm
Uniformity Coefficient: 1.3
Acid Solubility: < 2%
Specific Gravity: +/-1.65
Moh's Hardness: 3.0
Moisture Content: < 2%
Weight Calculation: 50 lbs./cu.ft.

ASTM C136 standard test method for sieve analysis of fine and coarse aggregates defines the sieve procedure to determine effective size and uniformity coefficient. 

Generally sieves require machine shaking times of 10 min (+/-0.5 min) for sand or gravel and 5 min (+/-0.5 min) for anthracite. All standard sieves used for testing filter media should conform to the tolerances defined in ASTM E11. 

Terms & Definitions

EFFECTIVE SIZE - The opening that will pass 10% (by dry wt.) of a representative sample of the filter material;

Example: distribution shows 12.2% passing #18 sieve (1.00 mm) therefore the sample has an effective size (d10) of 0.99 mm. 

UNIFORMITY COEFFICIENT - A ratio calculated as the size opening that will just pass 60% (by dry wt.) of a representative sample of the filter material divided by the size opening that will just pass 10% (by dry wt.) of the same sample.

Example: distribution shows 49.8 passing #16 sieve (1.18 mm) divided by the size opening that will just pass 10%. 


All Products Exceed AWWA Standards. NSF Approved.

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