ASTM C117 − 13 Standard Test Method for Materials Finer than 75 µm No. 200 Sieve in Mineral Aggregates by Washing

Scope of ASTM C117 − 13 Standard Test Method for Materials Finer than 75 µm No. 200 Sieve in Mineral Aggregates by Washing

1.1 This test method covers the determination of the amount of material finer than a 75-µm (No. 200) sieve in

aggregate by washing. Clay particles and other aggregate particles that are dispersed by the wash water,

as well as water-soluble materials, will be removed from the aggregate during the test.

1.2 Two procedures are included, one using only water for the washing operation, and the other including a

wetting agent to assist the loosening of the material finer than the 75-µm (No. 200)

sieve from the coarser material. Unless otherwise specified, Procedure A (water only) shall be used.

1.3 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

Significance and Use of ASTM C117 − 13 Standard Test Method for Materials Finer than 75 µm No. 200 Sieve in Mineral Aggregates by Washing

4.1 Material finer than the 75-µm (No. 200) sieve can be separated from larger particles much more efficiently and completely by wet sieving than through the use of dry sieving.

Therefore, when accurate determinations of material finer than 75 µm in fine or coarse aggregate are desired, this test method is used on the sample prior to dry sieving in accordance with Test Method C136.