ASTM C121-90(1999)

Standard Test Method for Water Absorption of Slate

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

• Status: Historical
• Publication Date: 09-Apr-1999
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: C18 - Dimension Stone
• Drafting Committee: C18.01 - Test Methods

Relations

• Replaced By: ASTM C121-06 - Standard Test Method for Water Absorption of Slate
• Effective Date: 01-Feb-2006
• Referred By: ASTM C1353/C1353M-20e1 - Standard Test Method for Abrasion Resistance of Dimension Stone Subjected to Foot Traffic Using a Rotary Platform Abraser
• Effective Date: 10-Apr-1999
• Referred By: ASTM C1721-22 - Standard Guide for Petrographic Examination of Dimension Stone
• Effective Date: 10-Apr-1999
• Referred By: ASTM C1799/C1799M-22e1 - Standard Guide to Dimension Stone Test Specimen Sampling and Preparation
• Effective Date: 10-Apr-1999

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C121–90(Reapproved 1999)
Standard Test Method for
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. Preparation of Specimens
2.1 ASTM Standards: 6.1 Split the slate to the required thickness and saw to size.
C 119 Terminology Relating to Dimension Stone When the specimens are prepared from shingles no saw cut
shall be nearer than 1 in. (25.4 mm) to the sheared edge of the
3. Terminology
shingle.
3.1 Definitions—All definitions are in accordance with Ter- 6.2 Free the specimens from loose particles by scrubbing
minology C 119. with a fiber brush and clean water.
4. Significance and Use
7. Procedure, Preferred Method
4.1 This test method is useful in indicating the differences in 7.1 Dry the specimens for 48 h in a ventilated oven at a
water absorption of slates. This test method also provides one
temperature of 60 6 2°C (140 6 4°F). At the 46th, 47th, and
element in the comparison of slates. 48th hour, weigh the specimens to ensure that the weight is the
same. If the weight continues to drop, continue to dry the
specimens until there are three successive hourly readings with
This test method is under the jurisdiction of ASTM Committee C-18 on
the same weight.
Dimension Stone and is the direct responsibility of Subcommittee C18.01 on Test
Methods.
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