1、Designation:D644999(Reapproved 2015)1Standard Test Method forFlow of Fine Aggregate Concrete for Fabric FormedConcrete(Flow Cone Method)1This standard is issued under the fixed designation D6449;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially updated units of measurement statement in April 2018.1.Scope1.1 This test method covers a proce
3、dure,used both in thelaboratory and in the field,for determining the time of efflux ofa specified volume of the fine aggregate concrete through astandardized flow cone and used for fabric formed concrete(FFC);however,the test method may also be used for otherfluid concrete.1.2 It is for use with fin
4、e aggregate concrete containing fineaggregate as define in Specification C33.1.3 This test method is intended for use with fine aggregateconcrete having an efflux time 9 to 15 s.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses after SI units areprov
5、ided for information only and are not considered standard.1.5 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 standard to establish appro-priate safety,health,and environmental practices and deter-mine the
6、 applicability of regulatory limitations prior to use.1.6 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
7、 by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC94/C94M Specification for Ready-Mixed ConcreteC109/C109M Test
8、Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C1064/C1064M Test Method for Temperature of FreshlyMixed Hydraulic-Cement Concrete3.Summary of Test Method3.1 The time of efflux of a specified volume of fineaggregate concrete from a standardized flow cone
9、is measured.4.Significance and Use4.1 This test method is applicable to the determination ofthe fluidity of various fluid fine aggregate concrete mixtures.5.Interferences5.1 The presence of solid particles retained on the 9.53 mm(38in.)sieve or lumps of unmixed material in the fineaggregate may caus
10、e the fine aggregate concrete to flowunevenly through the discharge tube of the flow cone or stopthe flow completely.Uneven flow will result in slower transitof the fine aggregate concrete,thereby indicating a falseconsistency.6.Apparatus6.1 Flow Cone,the dimensions as shown in Fig.1.The bodyand dis
11、charge tube can be stainless steel,cast aluminum,orother essentially noncorroding metal.6.2 Receiving Container,capacity 2000 mL(2.114 qt),minimum.6.3 Ring Stand or other devise,capable of supporting theflow cone in a vertical,steady position over the receivedcontainer.6.4 Level,carpenters or simila
12、r.6.5 Stop Watch,least reading of not more than 0.2 s.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.25 on Erosion andSediment Control Technology.Current edition approved Feb.15,2015.Published February 2015.Origin
13、allyapproved in 1999.Last previous edition approved in 2008 as D6449 99(2008).DOI:10.1520/D6449-99R15E01.2For 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 Do
14、cument Summary page onthe ASTM website.Copyright 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 standardization established in the Decision on Prin
15、ciples for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.6 Thermometer,having a range from 18 to 49C(0 to120F)and conforming to the requirements for ASTM ther-mometer No.36 degrees C.Other the
16、rmometers of the requiredaccuracy,including the metal immersion type,are acceptable.7.Test Sample7.1 The fine aggregate concrete test sample shall be inexcess of 1725 mL(1.823 qt)and shall be representative of thefine aggregate concrete in the mixer.7.2 When sampling and testing is being done for thepurpose of proportioning or comparing mixes or for qualifyingmaterials,the temperature of the fine aggregate concrete shallbe in accordance with Specification C94/C94M,unless other-wise specified.8.C
