1、Designation:C1849/C1849M17Standard Test Method forDensity and Air Content(Pressure Method)of Freshly MixedRoller-Compacted Concrete1This standard is issued under the fixed designation C1849/C1849M;the number immediately following the designation indicates theyear of original adoption or,in the case
2、of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of density andair content of freshly mixed roller-compact
3、ed concrete(RCC)using the apparatus described in Test Method C231/C231Mand the vibrating hammer described in Test Method C1435/C1435M.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;the
4、refore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.NOTE1Sieve size is identified by its standard designation in Speci-fication E11.The alternative designation given in parentheses is forinformation only and d
5、oes not represent a different standard sieve size.1.3 The text of this test method references notes andfootnotes that provide explanatory information.These notesand footnotes(excluding those in tables and figures)shall notbe considered as requirements of this standard.1.4 This standard does not purp
6、ort to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.(WarningFreshhydraulic cementitious mixtures are
7、caustic and may causechemical burns to skin and tissue upon prolonged exposure.)21.5 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
8、and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3C31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC125 Terminology Relating to Concrete and Concrete Ag-gregatesC138/C138M Test Meth
9、od for Density(Unit Weight),Yield,and Air Content(Gravimetric)of ConcreteC172/C172M Practice for Sampling Freshly Mixed Con-creteC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC231/C231M Test Method forAir Content of Freshly MixedConcrete by the Pressure MethodC670
10、 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC1067 Practice for Conducting a Ruggedness Evaluation orScreening Program for Test Methods for ConstructionMaterialsC1170/C1170M Test Method for Determining Consistencyand Density of Roller-Compacted Conc
11、rete Using a Vi-brating TableC1435/C1435M Practice for Molding Roller-CompactedConcrete in Cylinder Molds Using a Vibrating HammerE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology C
12、125.4.Significance and Use4.1 The test determines the air content of freshly mixedRCC exclusive of any air that may exist inside voids withinaggregate particles.For this reason,it is applicable to concretemade with normal-density or high-density aggregate particles1This test method is under the juri
13、sdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.45 on Roller-Compacted Concrete.Current edition approved June 15,2017.Published July 2017.DOI:10.1520/C1849_C1849M-17.2Section on Safety Precautions,Manual of Aggregate and Concrete
14、Testing,Annual Book of ASTM Standards,Vol 04.02.3For referenced ASTM standards,visit the ASTM 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.Copyright ASTM Int
15、ernational,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 standardization established in the Decision on Principles for theDevelopment of International Standards,Guid
16、es and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 and requires determination of the aggregate correction factordescribed in Test Method C231/C231M.4.2 If the concrete being tested contains aggregate thatwould be retained on a 50-mm(2-in.)sieve,the air content ofthe total mixture is only approximated by the test.4.3 The test determines the density of freshly mixed RCCcontaining aggregate with a maximum size not greater than50-mm(2-in.).4.4 T
