ASTM_C_1437_-_15.pdf

Designation:C143715Standard Test Method forFlow of Hydraulic Cement Mortar1This standard is issued under the fixed designation C1437;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of flow ofhydraulic cement mortars.1.2 The values stated in SI units are to be regarded as thestandard.No other units of measurement are included in thisstandard.When combined standards are cited,the selection ofthe measurement systems is at the users discretion subject tothe requirements of the referenced standard.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 standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C185 Test Method for Air Content of Hydraulic CementMortarC230/C230M Specification for Flow Table for Use in Testsof Hydraulic CementC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and Concretes3.Significance and Use3.1 This test method is intended to be used to determine theflow of hydraulic cement mortars,and of mortars containingcementitious materials other than hydraulic cements.3.2 While flow is not usually included in hydraulic cementspecifications,it is commonly used in standard tests thatrequire the mortar to have a water content that provides aspecified flow level.4.Apparatus4.1 Flow Table,Flow Mold,Conforming to the require-ments of Specification C230/C230M.4.2 Caliper,Conforming to the requirements of Specifica-tion C230/C230M.Alternatively,any outside-measuring cali-per constructed of corrosion-resistant material may be used,provided that it is incremented in millimetres and its maximumextent of measuring is at least 260 mm.4.3 Tamper,conforming to the requirements of Test MethodC109/C109M.4.4 Trowel,having a steel blade 100 to 150 mm in length,with straight edges.The edges when placed on a plane surfaceshall not depart from straightness by more than 1 mm.4.5 Straightedge,made of steel,shall be at least 200 mmlong and not less than 1.5 mm nor more than 3.5 mm inthickness.Its edge shall not depart from a plane surface bymore than 1 mm.5.Temperature and Humidity5.1 The temperature and relative humidity of the air in themixing room shall be as prescribed in Specification C511.6.Materials6.1 Hydraulic Cement MortarA mortar for which thedetermination of flow is specified or desired.7.Procedure7.1 Determination of Flow:7.1.1 Carefully wipe the flow table clean and dry,and placethe flow mold at the center.Place a layer of mortar about25 mm in thickness in the mold and tamp 20 times with thetamper.The tamping pressure shall be just sufficient to ensureuniform filling of the mold.Tamping should be uniformlydistributed over the cross section of each layer.For the bottomlayer this will necessitate inclining the tamper slightly whentamping near the perimeter.Then fill the mold with mortar andtamp as specified for the first layer.Cut off the mortar to a planesurface flush with the top of the mold by drawing thestraightedge or the edge of the trowel with a sawing motionacross the top of the mold.Wipe the table top clean and dry,being especially careful to remove any water from around theedge of the flow mold.Lift the mold away from the mortar1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.22 on Workability.Current edition Dec.1,2015.Published December 2015.Originally approved in1999.Last previous edition approved in 2013 as C1437 13.DOI:10.1520/C1437-15.2For 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 Document Summary page onthe ASTM website.*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 1 min after completing the mixing operation.Immediately dropthe table 25 times in 15 s,unless otherwise specified.7.1.2 If using the caliper specified in Specification C230/C230M,measure the diameter of the mortar along the fourlines scribed in the table top,recording each diameter as thenumber of caliper divisions,estimated to one tenth of adivision.If some other caliper is being used,measure thediameter of the mortar along the four lines scribed in the tabletop,recording each diameter to the nea