1、Designation:C403/C403M16Standard Test Method forTime of Setting of Concrete Mixtures by PenetrationResistance1This standard is issued under the fixed designation C403/C403M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of
2、last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()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 Defense.1.Scope*1.1 This test method covers the determin
3、ation of the time ofsetting of concrete,with slump greater than zero,by means ofpenetration resistance measurements on mortar sieved from theconcrete mixture.1.2 This test method is suitable for use only when tests ofthe mortar fraction will provide the information required.1.3 This test method may
4、also be applied to preparedmortars and grouts.1.4 This test method is applicable under controlled labora-tory conditions,as well as under field conditions.1.5 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
5、exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the us
6、er 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:2C125 Terminology Relating to Concrete and Concrete Ag-gregatesC143/C143M Test Method for Slump of Hydraulic-Ceme
7、ntConcreteC172 Practice for Sampling Freshly Mixed ConcreteC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC231 Test Method for Air Content of Freshly Mixed Con-crete by the Press
8、ure MethodC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC802 Practice for Conducting an Interlaboratory Test Pro-gram to Determine the Precision of Test Methods forConstruction MaterialsD1558 Test Method for Moisture Content Penetration Resis-tan
9、ce Relationships of Fine-Grained SoilsE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids3.Terminology3.1 DefinitionsDefinitions are given in TerminologyC125.4.Summary of Test Method4.1 A mortar
10、sample is obtained by sieving a representativesample of fresh concrete.The mortar is placed in a containerand stored at a specified ambient temperature.At regular timeintervals,the resistance of the mortar to penetration by stan-dard needles is measured.From a plot of penetration resistanceversus el
11、apsed time,the times of initial and final setting aredetermined.5.Significance and Use5.1 Since the setting of concrete is a gradual process,anydefinition of time of setting must necessarily be arbitrary.Inthis test method,the times required for the mortar to reachspecified values of resistance to p
12、enetration are used to definetimes of setting.5.2 This test method can be used to determine the effects ofvariables,such as water content;brand,type and amount ofcementitious material;or admixtures,upon the time of setting1This test method is under the jurisdiction of ASTM Committee C09 onConcrete a
13、nd Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.23 on Chemical Admixtures.Current edition approved Oct.1,2016.Published January 2017.Originallyapproved in 1957.Last previous edition approved in 2008 as C403/C403M08.DOI:10.1520/C0403_C0403M-16.2For referenced ASTM standards,
14、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
15、 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,Guides and Recomme
16、ndations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 of concrete.This test method may also be used to determinecompliance with specified time-of-setting requirements.5.3 This test method may also be applied to preparedmortars and grouts.However,when the setting time of concreteis desired,the test shall be performed on mortar sieved fromthe concrete mixture and not on a prepared mortar intended tosimulate the mortar fraction of the concrete;it has been shown
