ASTM C807-2005 Standard Test Method for Time of Setting of Hydraulic Cement Mortar by Modified Vicat Needle《用改良的维卡特针测定水凝水泥灰浆凝固时间的标准试验方法》.pdf
《ASTM C807-2005 Standard Test Method for Time of Setting of Hydraulic Cement Mortar by Modified Vicat Needle《用改良的维卡特针测定水凝水泥灰浆凝固时间的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C807-2005 Standard Test Method for Time of Setting of Hydraulic Cement Mortar by Modified Vicat Needle《用改良的维卡特针测定水凝水泥灰浆凝固时间的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 807 05Standard Test Method forTime of Setting of Hydraulic Cement Mortar by ModifiedVicat Needle1This standard is issued under the fixed designation C 807; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the time ofsetting of hydraulic cement mortar by means of the modifiedVi
3、cat needle.1.2 The values stated in SI units are to be regarded asstandard. The values given in parentheses are for informationonly.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 establ
4、ish 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.The use of gloves, protective clothing, and eye protec
5、tion isrecommended. Wash contact area with copious amounts ofwater after contact. Wash eyes for a minimum of 15 min.Avoidexposure of the body to clothing saturated with the liquid phaseof the unhardened material. Remove contaminated clothingimmediately after exposure.)1.4 The text of this standard r
6、eferences notes and footnoteswhich 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:2C 109/C 109M Test Method for Compressive Strength ofHydraulic Cement Mor
7、tars (Using 2-in. or 50-mm CubeSpecimens)C 183 Practice for Sampling and the Amount of Testing ofHydraulic CementC 187 Test Method for Normal Consistency of HydraulicCementC 219 Terminology Relating to Hydraulic CementC 305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plas
8、tic ConsistencyC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC 670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC 778 Specification for Standard SandC 845
9、 Specification for Expansive Hydraulic CementC 1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsD 1193 Specification for Reagent Water3. Terminology3.1 Terms used in this standard are defined in TerminologyC 219.4.
10、Summary of Test Method4.1 A 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
11、 consistency is then tested fortime 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 t
12、est method is to establish whetheror 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 C 845).6. Apparatus6.1 Tamper and Trowel, conforming to the require
13、ments ofTest Method C 109/C 109M.6.2 Vicat Apparatus, conforming to the requirements of TestMethod C 187, with the following modifications:1This 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
14、 approved May 1, 2005. Published May 2005. Originallyapproved in 1975. Last previous edition approved in 2003 as C 807 03a.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, re
15、fer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.2.1 For consistency determination, the plunger end of themovable rod shall be 17.5 6 0.5 mm in diameter instead of 10mm,
16、and the total mass of the movable rod (including the17.5-mm plunger) 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 Cons
17、istency 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 to therequirements of Prac
18、tice C 305.6.5 Glass Graduates, conforming to the requirements ofSpecification C 1005.6.6 Masses and Mass Determining Devices, conforming tothe requirements of Specification C 1005.7. Reagents and Materials7.1 Graded Standard Sand, conforming to the requirementsof Specification C 778.7.2 Mixing Wate
19、rPotable water is satisfactory for routinetests. For all referee and cooperative tests, reagent waterconforming to the requirements of Specification D 1193 forType III or Type IV grade of reagent water shall be used.8. Sampling8.1 When the test is part of acceptance testing, sample thecement in acco
20、rdance with Practice C 183.9. Conditioning9.1 Maintain the temperature of the room, dry materials,paddle, bowl, and molds at 23.0 6 3.0 C.9.2 Maintain the temperature of the mixing water at 23.0 62.0 C9.3 The relative humidity of the laboratory shall not be lessthan 50 %.9.4 The moist closet or mois
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