ASTM D5121-06
(Practice)Standard Practice for Preparation of Rock Slabs for Durability Testing
Standard Practice for Preparation of Rock Slabs for Durability Testing
SIGNIFICANCE AND USE
This practice is used to prepare specimens to evaluate any internal defects, such as cracks, that may not be apparent on the surfaces of broken blocks of rock. Such evaluation can also aid in the selection and location of slabs for testing as outlined in Practice D 4992. In some cases, the need for further testing or evaluation may be eliminated.
The sawing of rock samples will reduce them to a suitable size for testing and, in many cases, preserve the natural structure of the internal defects so the samples can be evaluated by the various durability tests.
Durability tests specimens should be 64 ± 6 mm 2.5± 0.25 in) thick normal to bedding or any potential planes of weakness which may be observed in the samples. In no case will the size of the slab be less than 125 mm (5 in.) on a side, excluding the thickness Ideally, a test specimen size equal to the proposed design size would provide the ultimate in correlation between laboratory tests and actual field performance. However, in most cases, this is neither practical nor economically feasible.
SCOPE
1.1 This practice covers the preparation of rock slabs for various tests used to evaluate any visual internal defects, or the durability of rock by means of laboratory tests. These tests include, but are not limited to, Test Methods D 5240, D 5312, and D 5313.
1.2 Units The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
1.3 All observed and measured values shall conform to the guidelines for significant digits and rounding established in Practice D 6026.
1.4 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word "Standard" in the title of this document means only that the document has been approved through the ASTM consensus process.
This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific hazards statement, see Section 7.
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Designation:D5121–06
Standard Practice for
1
Preparation of Rock Slabs for Durability Testing
This standard is issued under the fixed designation D5121; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D4992 Practice for Evaluation of Rock to be Used for
Erosion Control
1.1 This practice covers the preparation of rock slabs for
D5240 Test Method for Testing Rock Slabs to Evaluate
various tests used to evaluate any visual internal defects, or the
Soundness of Riprap by Use of Sodium Sulfate or Mag-
durability of rock by means of laboratory tests. These tests
nesium Sulfate
include, but are not limited to, Test Methods D5240, D5312,
D5312 Test Method for Evaluation of Durability of Rock
and D5313.
for Erosion Control Under Freezing and Thawing Condi-
1.2 Units—The values stated in inch-pound units are to be
tions
regarded as the standard. The SI units given in parentheses are
D5313 Test Method for Evaluation of Durability of Rock
for information only.
for Erosion Control Under Wetting and Drying Conditions
1.3 All observed and measured values shall conform to the
D6026 PracticeforUsingSignificantDigitsinGeotechnical
guidelines for significant digits and rounding established in
Data
Practice D6026.
1.4 This practice offers a set of instructions for performing
3. Terminology
one or more specific operations. This document cannot replace
3.1 Definitions—The definitions of terms used in this prac-
education or experience and should be used in conjunction
tice shall be in accordance with Terminology D653.
with professional judgment. Not all aspects of this practice may
3.2 Definitions of Terms Specific to This Standard:
be applicable in all circumstances. This ASTM standard is not
3.2.1 slab, n—a section of rock having two smooth, ap-
intended to represent or replace the standard of care by which
proximately parallel faces, produced by two saw cuts. The
the adequacy of a given professional service must be judged,
thickness of the slab is generally less than the other dimensions
nor should this document be applied without consideration of
of the rock. The slab will be the specimen of a rock which will
a project’s many unique aspects. The word “Standard” in the
subsequently undergo durability tests.
title of this document means only that the document has been
3.2.2 slice, n—in rock testing, the smooth surface of rock
approved through the ASTM consensus process.
piece produced by the cutting of the rock by a saw.
1.5 This standard does not purport to address all of the
3.2.3 rocksaw, n—a saw capable of cutting rock. The term
safety concerns associated with its use. It is the responsibility
“saw” shall include the blade, framework on which the blade is
of the user of this standard to establish appropriate safety and
mounted, and the motor.
health practices and determine the applicability of regulatory
limitations prior to use. For a specific hazards statement, see
4. Significance and Use
Section 7.
4.1 This practice is used to prepare specimens to evaluate
any internal defects, such as cracks, that may not be apparent
2. Referenced Documents
2 on the surfaces of broken blocks of rock. Such evaluation can
2.1 ASTM Standards:
also aid in the selection and location of slabs for testing as
D653 Terminology Relating to Soil, Rock, and Contained
outlined in Practice D4992. In some cases, the need for further
Fluids
testing or evaluation may be eliminated.
4.2 The sawing of rock samples will reduce them to a
1
This practice is under the jurisdiction of ASTM Committee D18 on Soil and suitablesizefortestingand,inmanycases,preservethenatural
Rock and is the direct responsibility of Subcommittee D18.17 on Rock for Erosion
structureoftheinternaldefectssothesamplescanbeevaluated
Control.
by the various durability tests.
Current edition approved Dec. 1, 2006. Published January 2007. Originally
4.3 Durability tests specimens should be 64 66mm2.56
approved in 1990. Last previous edition approved in 2001 as D5121–90(2001).
DOI: 10.1520/D5121-06.
0.25 in) thick normal to bedding or any potential planes of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
weakness which may be observed in the samples. In no case
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
will the size of the slab be less than 125 mm (5 in.) on a side,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. excluding the thickness Ideally, a test specimen size equal to
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 1
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