1、Designation:D5971/D5971M16Standard Practice forSampling Freshly Mixed Controlled Low-Strength Material1This standard is issued under the fixed designation D5971/D5971M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last
2、revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice explains the procedure for obtaining arepresentative sample of freshly mixed controlled low-strengthmaterial(CLSM
3、)as delivered to the project site on which testsare to be performed to determine compliance with qualityrequirements of the specifications under which the CLSM isfurnished(Note 1).This practice includes sampling fromrevolving-drum truck mixers and from agitating equipmentused to transport central-mi
4、xed CLSM.This Practice is basedon Practice C172 for concrete.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalue
5、s from the two systems may result in non-conformancewith the standard.NOTE1Composite samples are required by this practice unlessspecifically excepted by procedures governing the tests to be performed,such as tests to determine uniformity of consistency and mixer efficiency.Procedures used to select
6、 the specific test batches are not described in thispractice.It is recommended that random sampling be used to determineoverall specification compliance.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this
7、standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.(WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)1.4 This practice offers a set of i
8、nstructions for performingone or more specific 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
9、the standard of care bywhich the adequacy of 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 consens
10、usprocess.2.Referenced Documents2.1 ASTM Standards:3C172 Practice for Sampling Freshly Mixed ConcreteD653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and Co
11、nstructionD4832 Test Method for Preparation and Testing of Con-trolled Low Strength Material(CLSM)Test CylindersD6023 Test Method for Density(Unit Weight),Yield,Ce-ment Content,and Air Content(Gravimetric)of Con-trolled Low-Strength Material(CLSM)D6103 Test Method for Flow Consistency of ControlledL
12、ow Strength Material(CLSM)(Withdrawn 2013)43.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms in thisstandard,refer to Terminology D653.3.1.2 controlled low-strength material(CLSM),na mix-ture of soil,aggregates(sand,gravel,or both),cementitiousmaterials,water,and sometimes
13、 admixtures,that hardens intoa material with a higher strength than the soil,but less thanabout 8400 kPa 1200 psi.3.1.2.1 DiscussionUsed as a replacement for compactedbackfill,CLSM can be placed as a slurry,a mortar,or acompacted material and typically has strengths of 350 to 700kPa 50 to 100 psi fo
14、r most applications.3.2 Definitions of Terms Specific to This Standard:1This practice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.15 on Stabilization WithAdmixtures.Current edition approved Dec.1,2016.Published December 2016.Or
15、iginallyapproved in 1995.Last previous edition approved in 2013 as D5971 13.DOI:10.1520/D5971_D5971M-16.2Section on Safety Precautions,Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards,Vol 04.02.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Cu
16、stomer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.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 StatesThis international standard was developed in accordance with internationally recognized princ
