1、Designation:D507908Standard Practices forPreserving and Transporting Rock Core Samples1This standard is issued under the fixed designation D5079;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in pa
2、rentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 These practices cover the preservation,transportation,storage,cataloging,retrieval,and post-test disposition of rockcore samples obtained for testing
3、purposes and geologic study.1.2 These practices apply to both hard and soft rock,butexclude ice and permafrost.1.3 These practices do not apply to those situations in whichchanges in volatile gas components,contamination of the porefluids,or mechanical stress relaxation affect the intended usefor th
4、e core.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This practice offers a set of instruction for performingone or more specifi
5、c operations.This document cannot replaceeducation or experience and should be used in conjunctionwith professional judgement.Not all aspects of this practicemay be applicable in all circumstances.This ASTM standard isnot intended to represent or replace the standard of care bywhich the adequacy of
6、a given professional service must bejudged,nor should this document be applied without consid-eration of a projects many unique aspects.The word“Stan-dard”in the title of this document means only that thedocument has been approved through the ASTM consensusprocess.1.6 This standard does not purport
7、to address the safetyproblems associated with its use.It is the responsibility of theuser of this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2D420 Guide to Site Characte
8、rization for Engineering Designand Construction Purposes(Withdrawn 2011)3D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2113 Practice for Rock Core Drilling and Sampling ofRock for Site InvestigationD4220 Practices for Preserving and Transporting SoilSamples2.2 API Standard:API RP-40 Rec
9、ommended Practice for Core Analysis Pro-cedure43.Terminology3.1 DefinitionsSee Terminology D653 for general defini-tions.3.2 Definitions of Terms Specific to This Standard:3.2.1 critical caresamples which are fragile or fluid ortemperature sensitive.This protection level includes the re-quirements p
10、rescribed for routine and special care.3.2.2 routine carenon-sensitive,non-fragile samples forwhich only general visual identification is necessary,andsamples which will not change or deteriorate before laboratorytesting.3.2.3 soil-like carematerials which are so poorly consoli-dated that soil sampl
11、ing procedures must be employed toobtain intact pieces of core.3.2.4 special carefluid sensitive samples and those whichmust later be subjected to testing.Requirements for this levelof protection include those prescribed for routine care.1These practices are under the jurisdiction ofASTM Committee D
12、18 on Soil andRock and are the direct responsibility of Subcommittee D18.12 on Rock Mechanics.Current edition approved July 1,2008.Published July 2008.Originally approvedin 1990.Last previous edition approved in 2006 as D5079 02(2006).DOI:10.1520/D5079-08.2For referenced ASTM standards,visit the AST
13、M website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American P
14、etroleum Institute(API),1220 L.St.,NW,Washington,DC 20005-4070,http:/www.api.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Significance and Use4.1 The geologic chara
15、cteristics and the intended use of therock core samples determine the extent and type of preserva-tion required.If engineering properties are to be determined forthe core,it must be handled and preserved in such a way thatthe measured properties are not significantly influenced bymechanical damage,c
16、hanges in chemistry,and environmentalconditions of moisture and temperature,from the time that thecore is recovered from the core drill until testing is performed.Drill core is also the sample record for the subsurface geologyat the borehole location,and as such must be preserved forsome period of time,in some cases indefinitely,for futuregeologic study.4.2 These practices present a selection of curatorial require-ments which apply to the majority of projects.The require-ments are given for a va