ASTM_C_1362_-_09.pdf

Designation:C136209StandardTest Method forFlow of Freshly Mixed Hydraulic-Cement Concrete1This standard is issued under the fixed designation C1362;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 determination of the flow of asample of freshly mixed concrete,either in the field or in thelaboratory.1.2 This test method is applicable to concrete having coarseaggregate up to 37.5 mm in size.If the coarse aggregate islarger than 37.5 mm in size,the test method is applicable whenthe fraction of concrete larger than 37.5 mm is removed inaccordance with Practice C172.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 The text of this standard references notes and footnotesthat provide explanatory information.These notes and foot-notes(excluding those in tables and figures)shall not beconsidered as requirements of this 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 and health practices and determine the applica-bility of regulatory limitations prior to use.(WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)2.Referenced Documents2.1 ASTM Standards:3C172 Practice for Sampling Freshly Mixed ConcreteC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction Materials3.Summary of Test Method3.1 A flow apparatus comprising an outer partially perfo-rated hollow tube and an inner calibrated floating rod isinserted into a sample of freshly mixed concrete to a presetlevel and held in place by a collar floater.A portion of theconcrete is allowed to flow into the hollow tube through itsperforations for a period of 40 s.The inner floating rod is thenlowered onto the concrete surface that has penetrated thehollow tube.The height of the concrete in the hollow tube isread from the scale on the upper portion of the floating rodprotruding from the top of the hollow tube.With increasingfluidity of the concrete a higher flow reading is obtained on ascale from zero to one hundred divisions.4.Significance and Use4.1 This test method permits a rapid assessment of the flowand consistency of freshly mixed concrete(see Note 1).4.2 This test method also provides information on thechange in flow and consistency,with time,of concrete con-taining superplasticizer admixtures.4.3 This test method can be used to measure the uniformitycharacteristics of flow and consistency of freshly mixedconcrete and its change with time.NOTE1This test method may not be appropriate for use in evaluatinggap-graded aggregate concrete.5.Apparatus5.1 Details of the apparatus are shown in Fig.1.Theapparatus consists of(1)measuring rod,(2)scale datum,(3)hollow tube with round holes and longitudinal slots,(4)holding pin,(5)collar floater,and(6)tube point.5.2 Measuring rod is a hollow tube,13 mm in outsidediameter,336 mm long with a wall thickness of 1.5 mm and itis capped at both ends with a cap 15 mm in outside diameter.A scale datum is 45 mm in outside diameter and 25 mm wideand fabricated to fit hollow tube and accommodate measuringrod.Hollow tube has an outside diameter of 33 mm,and it is310 mm long with a wall thickness of 4 mm and has 16 roundholes,9.4 mm in diameter,and 4 longitudinal slots,9.4 mmwide by 50 mm long,which are distributed around thecircumference of the tube as shown in Fig.1.A pin which is arivet,3.2 mm in diameter,protrudes 3.2 mm inside tube.Collar1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.60 on Testing Fresh Concrete.Current edition approved June 1,2009.Published July 2009.Originally approvedin 1997.Last previous edition approved in 2004 as C136204.DOI:10.1520/C1362-09.2Section on Safety Precautions,Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards,Vol 04.023For 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 StatesNOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM International(www.astm.org)for the latest information1 floater,made of a plate 5 mm thick,has an outside diameter of90 mm and inside diameter of 33 mm,is