ASTM C121-06
(Test Method)Standard Test Method for Water Absorption of Slate
Standard Test Method for Water Absorption of Slate
SIGNIFICANCE AND USE
This test method is useful in indicating the differences in water absorption of slates. This test method also provides one element in the comparison of slates.
SCOPE
1.1 This test method covers the determination of the water absorption of slate.
1.2 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C121–06
Standard Test Method for
1
Water Absorption of Slate
This standard is issued under the fixed designation C 121; 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.
This standard has been approved for use by agencies of the Department of Defense.
INTRODUCTION
Itisoftendesirabletogainsomeideaoftheporosityofamaterialinquestion.Actualdeterminations
of the pore space require the use of rather elaborate and refined equipment as well as considerable
precision in carrying out the tests. For comparative purposes the absorption test affords a simple and
sufficiently accurate means of obtaining the desired information. As applied to slate this test requires
somewhat more care and precision than many other materials because of its dense nature and,
consequently, the small quantities to be dealt with. Furthermore, the cleavage of slate—that property
which permits it to be split into thin sheets of uniform thickness—must be taken into consideration
when this test is made. On this account misleading results are often obtained on cubical specimens due
to accidental cleavage cracks in the specimens. The shapes of specimens and larger number of
specimens recommended in the following procedure are intended to eliminate to a large extent the
inconsistent results which may be obtained on this material.
1. Scope 5. Test Specimens
1.1 This test method covers the determination of the water 5.1 The test specimens shall consist of square or rectangular
3 5
absorption of slate. slabs from ⁄16 to ⁄16 in. (4.8 to 7.9 mm) in thickness and not
1.2 This standard does not purport to address the safety less than 4 in. (101.6 mm) on any side.
concerns, if any, associated with its use. It is the responsibility 5.2 Not less than six specimens shall be prepared from each
of the user of this standard to consult and establish appropriate sample of slate, the sample being considered as any number of
safety and health practices and determine the applicability of pieces selected to represent a definite part or grade of the
regulatory limitations prior to use. deposit.
2. Referenced Documents 6. Sampling
2.1 ASTM Standards: 6.1 Select the sample to represent a true average of the type
C119 Terminology Relating to Dimension Stone or grade of stone under consideration and of the quality
supplied to the market under the type designation to be tested.
3. Terminology
The sample may be selected by the purchaser or his authorized
3.1 Definitions—All definitions are in accordance with Ter- representativefromthequarriedstoneortakenfromthenatural
minologyC119. ledge and shall be of adequate size to permit the preparation of
the desired number of test specimens. When perceptible
4. Significance and Use
variations occur, the purchaser may select as many samples as
4.1 This test method is useful in indicating the differences in
are necessary for determining the variations in water absorp-
water absorption of slates. This test method also provides one
tion of slate.
element in the comparison of slates.
7. Preparation of Specimens
7.1 Split the slate to the required thickness and saw to size.
1
This test method is under the jurisdiction of ASTM Committee C18 on
When the specimens are prepared from shingles no saw cut
Dimension Stone and is the direct responsibility of Subcommittee C18.01 on Test
shall be nearer than 1 in. (25.4 mm) to the sheared edge of the
Methods.
Current edition approved Feb. 1, 2006. Published February 2006. Originally
shingle.
approved in 1925 as C 121 – 25 T. Last previous edition approved in 1999 as
C 121– 90(1999).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C121–06
7.2 Free the specimens from loose particles by scrubbing of immersion. Instead of allowing the specimens to soak for 48
with a fiber brush and clean water. h place them in an enameled pan or other suitable vessel, cover
with water, and boil for 8 h. Before the final weighing, cool the
8. Procedure, Preferred Method
specimens by allowing tap water to flow over them for at least
8.1 Dry the specimens for 48 h in a ventilated oven at a
30 min.
temperature of 60 6 2°C (140 6 4°F). At the 46th, 47th, and
NOTE 2—Boiling for 8 h has been found to give practically the same
48th hour, weigh the specimens to ensure that the weight is the
saturation as immersion for 48 h.
same. If the weight continues to drop, continue to dry the
specimens until there are three successive hourly readings with
10. Calculation and Report
the same weight.
10.1
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.