1、Designation:C143/C143M-15INTERNATIONALStandard Test Method forSlump of Hydraulic-Cement Concrete1This standard is issued under the fixed designation C143/C143M:the number immediately following the designation indicates the yearof original adoption or.in the case of revision.the year of last revision
2、.A number in parentheses indicates the year of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense1.Scope*C173/C173M Test Method for Air Content of Freshly Mix
3、ed1.1 This test method covers determination of slump ofConcrete by the Volumetric Methodhydraulic-cement concrete,both in the laboratory and in theC231 Test Method for Air Content of Freshly Mixed Con-field.crete by the Pressure MethodC670 Practice for Preparing Precision and Bias Statements1.2 The
4、values stated in either SI units or inch-pound unitsfor Test Methods for Construction Materialsare to be regarded separately as standard.Within the text,theD638 Test Method for Tensile Properties of PlasticsSI units are shown in brackets.The values stated in eachsystem may not be exact equivalents:t
5、herefore,each system3.Summary of Test Methodshall be used independently of the other.Combining valuesfrom the two systems may result in non-conformance with the3.1 A sample of freshly mixed concrete is placed pacted by rodding in a mold shaped as the frustum of acone.The mold is raised,and the concr
6、ete allowed to subside.1.3 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotesThe vertical distance between the original and displaced(excluding those in tables and figures)shall not be consideredposition of the center of the top surfa
7、ce of the concrete ismeasured and reported as the slump of the concrete.as requirements of the standard.1.4 This standard does not purport to address all of the4.Significance and Usesafery concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro
8、-4.1 This test method is intended to provide the user with apriate safery and health practices and determine the applica-procedure to determine slump of plastic hydraulic-cementbility of regulatory limitations prior to use.(Warning-Freshconcretes.hydraulic cementitious mixtures are caustic and may c
9、auseNor 1-This test method was originally developed to provide achemical burns to skin and tissue upon prolonged exposure.2)technique to monitor the consistency of unhardened concrete.Underlaboratory conditions,with strict control of all concrete materials,the2.Referenced Documentsslump is generally
10、 found to increase proportionally with the water contentof a given concrete mixture,and thus to be inversely related to concrete2.1 ASTM Standards:strength.Under field conditions,however,such a strength relationship isC31/C31M Practice for Making and Curing Concrete Testnot clearly and consistently
11、shown.Care should therefore be taken inSpecimens in the Fieldrelating slump results obtained under field conditions to strength.C138/C138M Test Method for Density(Unit Weight).Yield.4.2 This test method is considered applicable to plasticand Air Content(Gravimetric)of Concreteconcrete having coarse
12、aggregate up to 1V in.37.5 mminC172 Practice for Sampling Freshly Mixed Concretesize.If the coarse aggregate is larger than 1 in.37.5 mminsize,the test method is applicable when it is performed on thefraction of concrete passing a 1V2-in.37.5-mmsieve,with theThis test method is under the jurisdictio
13、n of ASTM Committee C09 onlarger aggregate being removed in accordance with the sectionConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.60 on Testing Fresh Concrete.titled Additional Procedure for Large Maximum Size Aggre-Current edition approved June 15.2015.Publ
14、ished August 2015.Originallygate Concretein Practice C172approved in 1922.Last previous edition approved in 2012 as C143/C143M-12.D0L10.1520/C0143C0143M-154.3 This test method is not considered applicable to non-2Section on Safety Precautions,Manual of Aggregate and Concrete Testing.plastic and non-
15、cohesive concreteAnnual Book of ASTM Standards.Vol.04.02.For referenced ASTM standards.visit the ASTM website,www.astm.org.orNorE 2-Concretes having slumps less than in.15 mml may not becontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMadequately plastic and concretes having sl
16、umps greater than about 9 in.Standards volume information.refer to the standards Document Summary page on230 mmmay not be adequately cohesive for this test to have signifi-the ASTM website.cance.Caution should be exercised in interpreting such results.*A Summary of Changes section appears at the end
17、 of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700.West Conshohocken,PA 19428-2959.United StatesASTM InteC143/C143M-155.Apparatuscan be fully released without movement of the mold and the5.1 Mold-The test specimen shall be formed in a moldbase is large enough to contain
18、all of the slumped concrete inmade of metal or plastic not readily attacked by the cementan acceptable test.paste.The mold shall be sufficiently rigid to maintain theNore 3-ABS(Acrylonitrile Butadiene Styrene)plastic exhibits thespecified dimensions and tolerances during use,resistant tofollowing mi
19、nimum mechanical properties:impact forces,and shall be non-absorbent.Metal molds shallTensile modulus of elasticity.320000p82206MPahave an average thickness of not less than 0.060 in.1.5 mmat 73 F 23Cwith no individual thickness measurement less than 0.045 in.Tensile strength(Test Method D638)5670ps
20、39 MPa1.15 mm.Plastic molds shall be ABS plastic or equivalent(Note 3)with a minimum average wall thickness of 0.125 in.Percent Elongation at Break,40%at 73 F 23 C3 mm,with no individual thickness measurement less than0.100 in.2.5 mml.The manufacturer or supplier shall certify5.1.1 Check and record
21、conformance to the molds specifiedthe materials used in mold construction are in compliance withdimensions when it is purchased or first placed in service andthe requirements of this test method.The mold shall be in theat least annually thereafter.form of the lateral surface of the frustum of a cone
22、 with the5.2 Tamping Rod-A round,smooth,straight steel rod,withbase 8 in.200 mmin diameter,the top 4 in.100 mmina 5 in.16 mml 6 in.2 mml diameter.The length of thediameter,and the height 12 in.300 mml.Individual diameterstamping rod shall be at least 4 in.100 mmgreater than theand heights shall be w
23、ithin in.3 mml of the prescribeddepth of the mold in which rodding is being performed,but notdimensions.The base and the top shall be open and parallel togreater than 24 in.600 mmin overall length(Note 4).The rodeach other and at right angles to the axis of the cone.The moldshall have the tamping en
24、d or both ends rounded to ashall be provided with foot pieces and handles similar to thosehemispherical tip of the same diameter as the rod.shown in Fig.I.The mold shall be constructed without a seam.Nore 4-A rod length of 16 in.400 mmto 24 in.600 mmmeets theThe interior of the mold shall be relativ
25、ely smooth and freerequirements of the following:Practice C31/C3IM.Test Method C138/C138M.Test Method C143/C143M.Test Method C173/C173M.and Testfrom projections.The mold shall be free from dents,Method C231.deformation,or adhered mortar.A mold which clamps to anonabsorbent base plate is acceptable i
26、nstead of the one5.3 Measuring Device-A ruler,metal roll-up measuringillustrated,provided the clamping arrangement is such that ittape,or similar rigid or semi-rigid length measuring instrumentmarked in increments of in.5 mmor smaller.Theinstruement length shall be at least 12 in.300 mml.5.4 Scoop-o
27、f a size large enough so each amount ofconcrete obtained from the sampling receptacle is representa-tive and small enough so it is not spilled during placement inthe mold.6.Sample6.1 The sample of concrete from which test specimens aremade shall be representative of the entire batch.It shall beobtai
28、ned in accordance with Practice C172.PLAN7.Procedure4持ID7.1 Dampen the mold and place it on a rigid,flat,level,moist,nonabsorbent surface,free of vibration,and that is largeenough to contain all of the slumped concrete.It shall be heldfirmly in place during filling and perimeter cleaning by theopera
29、tor standing on the two foot pieces or by a clamping16Thicknessarrangement to a base plate as described in 5.1.From thesample of concrete obtained in accordance with Section 6,immediately fill the mold in three layers,each approximatelyone third the volume of the mold(See Note 5).Place theconcrete i
30、n the mold using the scoop described in 5.4.Movethe scoop around the perimeter of the mold opening to ensurean even distribution of the concrete with minimal segregation.8IDThickness6NorE 5-One third of the volume of the slump mold fills it to a depthof 2%in.70 mml:two thirds of the volume fills it
31、to a depth of 6%in.Dimensional Units160mml.in.3%12mm121315257580】【10020013007.2 Rod each layer 25 times uniformly over the crosssection with the rounded end of the rod.For the bottom layer,FIG.1 Mold for Slump Testthis will necessitate inclining the rod slightly and makingt ASTM Inte4C143/C143M-15SU
32、MMARY OF CHANGESCommittee C09 has identified the location of selected changes to this standard since the last issue(C143/C143M-12)that may impact the use of this standard.(Approved June 15,2015.)(/Section 5.1.1.I was deleted.ASTM International takes no position respecting the validity of any patent
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35、eceive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM Inte
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