1、Designation:C80713Standard Test Method forTime of Setting of Hydraulic Cement Mortar by ModifiedVicat Needle1This standard is issued under the fixed designation C807;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last re
2、vision.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 the time ofsetting of hydraulic cement mortar by means of the modifiedVicat needle.1
3、.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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-pri
4、ate 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)1.4 The text of this standard references notes and footnoteswhich
5、provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.2.Referenced Documents2.1 ASTM Standards:3C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C
6、183 Practice for Sampling and the Amount of Testing ofHydraulic CementC187 Test Method for Amount of Water Required for Nor-mal Consistency of Hydraulic Cement PasteC219 Terminology Relating to Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic Consi
7、stencyC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC778 Specification for SandC845 Specification for Expa
8、nsive Hydraulic CementC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsD1193 Specification for Reagent Water3.Terminology3.1 Terms used in this standard are defined in TerminologyC219.4.Summary of Test Method4.1 A
9、mortar is prepared with the cement to be tested,usingstipulated quantities of cement and water,and sufficient stan-dard sand to produce a required consistency as determined bya stipulated penetration using the plunger of the modified Vicatapparatus.Mortar of the proper consistency is then tested for
10、time of setting,using the needle of the modified Vicatapparatus for the determination of a stipulated penetration.Thetime required to obtain the stipulated penetration of themodified Vicat needle is the time of setting.5.Significance and Use5.1 The purpose of this test method is to establish whether
11、or not a cement complies with a specification limit on time ofsetting.It has been found to be particularly applicable for thedetermination of the setting time of expansive cements(seeSpecification C845).6.Apparatus6.1 Tamper and Trowel,conforming to the requirements ofTest Method C109/C109M.In addit
12、ion,the edges of the trowelwhen placed on a plane surface shall not depart from straight-ness by more than 1 mm.6.2 Vicat Apparatus,conforming to the requirements of TestMethod C187,with the following modifications:6.2.1 For consistency determination,the plunger end of themovable rod shall be 17.5 6
13、 0.5 mm in diameter instead of 101This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.30 on Time of Set.Current edition approved Dec.1,2013.Published January 2014.Originallyapproved in 1975.Last previous edition approved in 2
14、008 as C807 08.DOI:10.1520/C0807-13.2See the section on Safety,Manual of Cement Testing,Annual Book of ASTMStandards,Vol 04.01.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,ref
15、er 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 mm,and the total mass of the movable rod(including the17.5-mm pl
16、unger)shall be 400 6 0.5 g.6.2.2 For time of setting determination,a 2 6 0.05-mmstainless steel needle shall be substituted for the 1-mm needle.The total mass of the movable rod with the 2-mm needle shallbe 300 6 0.5 g.6.3 Mold for Consistency and Setting TimeA smoothcylindrical brass ring 76 6 0.5 mm inside diameter(3-in.brasstubing)by 40 6 1 mm deep,cemented to a plane,non-absorptive plate,or smooth cylindrical brass cups having theabove dimensions.6.4 Mixer,Bowl,Paddle,and Scraper,conforming