1、Designation:D7759/D7759M21Standard Guide forNuclear Surface Moisture and Density Gauge Calibration1This standard is issued under the fixed designation D7759/D7759M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revi
2、sion.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 Procedure AThis guide describes the process andobjective of formulating the mathematical relationship betweenthe density system cou
3、nt of a nuclear surface moisture anddensity gauge and the corresponding wet density value of thedensity standard upon which the density system response wasobserved.1.2 Procedure BThis guide describes the process andobjective of comparing the wet density measured by a nuclearsurface moisture and dens
4、ity gauge and the correspondingdensity value of the density standard upon which the densitysystem response was observed.1.3 This guide describes the process and objective of theverification of the measurements of a nuclear surface moistureand density gauge.1.4 Procedure AThis guide describes the pro
5、cess andobjective of formulating the mathematical relationship betweenthe water content system count of a nuclear surface moistureand density gauge and the corresponding water mass per unitvolume value of the water content standard upon which thewater content system response was observed.1.5 Procedu
6、re BThis guide describes the process andobjective of comparing the water mass per unit volumemeasured by a nuclear surface moisture and density gauge andthe corresponding water mass per unit volume of the corre-sponding water content standard upon which the water contentsystem response was observed.
7、1.6 This guide describes the process and objective of theverification of the measurements of a nuclear surface moistureand density gauge.1.7 This guide describes two mathematical processes bywhich the gauge measurement precision may be computed ormeasured.1.8 This guide offers guidance for developin
8、g and reportingestimates of uncertainties in measurements made with gaugesthat have undergone calibration and verification.1.9 All observed and calculated values shall conform to theguide for significant digits and rounding established in PracticeD6026.1.10 UnitsThe values stated in either SI units
9、or inch-pound units are to be regarded separately as standard.Thevalues stated in each system are not necessarily exact equiva-lents;therefore,to ensure conformance with the standard,eachsystem shall be used independently of the other,and valuesfrom the two systems shall not be combined.Within the t
10、ext ofthis standard,SI units appear first followed by the inch-pound(or other non-SI)units in brackets.1.10.1 Reporting of test results in units other than SI shallnot be regarded as nonconformance with this guide.1.11 This standard does not purport to address all of thesafety concerns,if any,associ
11、ated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.12 This guide offers an organized collection of informa-tion or a series of options and
12、 does not recommend specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all aspects of this guide may be applicable in allcircumstances.This ASTM standard is not intended to repre-sent or replace the standard of
13、 care by which the adequacy ofa given professional service must be judged,nor should thisdocument be applied without consideration of a projects manyunique aspects.The word“Standard”in the title of thisdocument means only that the document has been approvedthrough the ASTM consensus process.1This pr
14、actice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.08 on Special andConstruction Control Tests.Current edition approved May 1,2021.Published June 2021.Originallyapproved in 2012.Last previous edition approved in 2014 as D775914
15、.DOI:10.1520/D7759-21.*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 principles on sta
16、ndardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.11.13 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalB