ASTM C325-81(1997)e1

e1
Designation: C 325 – 81 (Reapproved 1997)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Wet Sieve Analysis of Ceramic Whiteware Clays
This standard is issued under the fixed designation C 325; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Section 8 was added editorially in October 1997.
1. Scope 4.2 The sample as received shall be placed in a drying oven
at 100 to 110°C for a period of not less than 5 h prior to testing.
1.1 This test method covers the wet sieve analysis of
ceramic whiteware clays. This test method is intended for use
5. Procedure
in testing shipments of clay as well as for plant control tests.
5.1 Transfer duplicate portions, of approximately 250 g of
1.2 This standard does not purport to address all of the
the dried clay sample, weighed to the nearest 0.1 g, to
safety concerns, if any, associated with its use. It is the
containers of at least 2-L capacity. Wet the clay with 1 L of
responsibility of the user of this standard to establish appro-
water and allow to slake for 2 h. If a free-flowing slurry is not
priate safety and health practices and determine the applica-
produced by this treatment, add another 500 mL of water.
bility of regulatory limitations prior to use.
5.2 To ensure complete separation of clay from nonplastic
2. Referenced Documents impurities, agitate the slurry by means of a mechanical stirrer
(3.1). Continue the stirring between 5 and 10 min.
2.1 ASTM Standards:
2 5.3 Transfer the slaked and stirred sample, without loss, to
C 322 Practice for Sampling Ceramic Whiteware Clays
the finest sieve to be employed in the test, and wash by means
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
3 of a small jet of water from a ⁄4-in. (6.4-mm) soft rubber hose
poses
attached to a water supply having a pressure not in excess of
3. Apparatus that of an ordinary city main. The force of the jet may be
controlled by compressing the end of the hose between the
3.1 Stirring Device—A mechanical stirrer with a three-
thumb and forefinger. Take care to avoid loss of sample from
bladed propeller 2 in. (51 mm) in diameter and having a speed
splashing. Continue washing until water passing through the
of approximately 1700 r/min, or the equivalent, shall be
sieve shows only traces of sample. Should lumpy material
provided.
remain on the screen, return the residue to the stirrer container
3.2 Sieves—The sieves shall conform to Specification E 11
by careful washing with a gentle jet of water, and agitate in
and shall include the No. 100 (150-μm), No. 140 (106-μm), No.
approximately 1 L of water for 10 min, then wash the slurry as
200 (75-μm) and No. 325 (45-μm) sieves (Note 1). The wire
previously described.
cloth for these sieves shall be woven (not twilled) and shall be
5.4 Wash the residue remaining on the finest sieve into the
mounted in circular metal frames 8 in. (203 mm) in diameter,
pan. Thoroughly wet the remaining sieves to be used in the test
which shall be so constructed as to permit nesting of two or
with clear water, and nest them in the proper sequence on the
more sieves. A pan and cover for the sieves shall be provided.
finest sieve. Wash the residue in the pan quantitatively onto the
NOTE 1—Equivalent sieves from other standard series, such as the Tyler
top sieve, and give the stack a prelimina
...