ASTM C937-2002 Standard Specification for Grout Fluidifier for Preplaced-Aggregate Concrete《预置集料混凝土的灌浆流动机械的标准规范》.pdf

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1、Designation: C 937 02Standard Specification forGrout Fluidifier for Preplaced-Aggregate Concrete1This standard is issued under the fixed designation C 937; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.

2、A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers fluidifier for grout used

3、 forpreplaced-aggregate (PA) concrete.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationpurposes only.1.3 The following precautionary caveat pertains only to thetest method portion, Section 8, of this standard: This standarddoes n

4、ot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:C

5、 33 Specification for Concrete Aggregates2C 150 Specification for Portland Cement3C 618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in Concrete2C 637 Specification for Aggregates for Radiation-ShieldingConcrete2C 938 Practice for Proportioning Grout Mixtures forPreplac

6、ed-Aggregate Concrete2C 939 Test Method for Flow of Grout for Preplaced-Aggregate Concrete (Flow Cone Method)2C 940 Test Method for Expansion and Bleeding of FreshlyMixed Grouts for Preplaced-Aggregate Concrete in theLaboratory2C 941 Test Method for Water Retentivity of Grout Mixturesfor Preplaced-A

7、ggregate Concrete in the Laboratory2C 942 Test Method for Compressive Strength of Grouts forPreplaced-Aggregate Concrete in the Laboratory2C 943 Practice for Making Test Cylinders and Prisms forDetermining Strength and Density of Preplaced-AggregateConcrete in the Laboratory2C 953 Test Method for Ti

8、me of Setting of Grouts forPreplaced-Aggregate Concrete in the Laboratory23. Ordering Information3.1 The purchaser shall specify the material desired as“grout fluidifier for preplaced-aggregate concrete.” The mate-rial shall meet the requirements of this specification.4. Materials4.1 Grout ingredien

9、ts shall conform to the following re-quirements:4.1.1 Portland cement shall meet the requirements of Speci-fication C 150 for the type to be used.4.1.2 Pozzolan shall meet the requirements of SpecificationC 618.4.1.3 Fine aggregate shall meet the requirements of Speci-fication C 33 except that gradi

10、ng shall conform to SpecificationC 637, Table number 2, Grading 1 for Fine Aggregate.5. Physical Requirements5.1 The fluidifier, when tested in grout as specified herein,shall conform to the following requirements:Reduction in mixing water, min, % of control(Test Method C 941) 3Expansion, 3 h after

11、mixing,(Test Method C 940) See Table 1Bleeding, 3 h after mixing, (Test Method C 940),max, % 2Increase in water retentivity (Test Method C 941),min, % of control 60Initial setting time, min, h (Test Method C 953) 4Final setting time, max, h (Test Method C 953) 241This specification is under the juri

12、sdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC9.41 on Concrete for Radiation Shielding.Current edition approved Dec. 10, 2002. Published February 2003. Originallyapproved in 1980. Last previous edition approved in 1997 as C 93797.2

13、Annual Book of ASTM Standards, Vol 04.02.3Annual Book of ASTM Standards, Vol 14.01.TABLE 1 Expansion LimitsAlkali Content of Cement, %Expressed as Na2OExpansion Limits, %0.80 or more 7 to 140.40 to 0.79 5 to 120.39 or less 3 to 91Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West

14、 Conshohocken, PA 19428-2959, United States.Compressive strength at 7 days and 28 days, (TestMethod C 942), min, % of control 906. Composition6.1 The fluidifier shall be composed of materials that willyield a product having the properties stipulated under PhysicalRequirements when tested in accordan

15、ce with this specifica-tion.7. Sampling7.1 The test sample of fluidifier shall have a mass of at least225g(12 lb) and shall be representative of the materialsupplied. When feasible, the test sample shall be compositedfrom grab samples taken from not fewer than four packagesselected at random.8. Test

16、 Method8.1 Summary of MethodPhysical properties of grout con-taining fluidifier are determined and compared with corre-sponding properties of grout made without fluidifier.8.2 Significance and UseThe effects of adding fluidifier toa standard grout mixture are determined in order to evaluate itsabili

17、ty to reduce mixing water, prevent early stiffening, holdsolid constituents in suspension, produce controlled expansionprior to initial setting, and maintain or increase compressivestrength.8.3 Procedure:8.3.1 Have all grout materials including mixing water at23.0 6 2.0C (73.5 6 3.5F) at the start o

18、f the test.8.3.2 Maintain the laboratory and curing room at 23.0 62.0C (73.5 6 3.5F) at all times during testing.8.3.3 Grout Preparation:8.3.3.1 Proportion two grout mixtures, one a control mix-ture without and one a test mixture with the grout fluidifierunder consideration, each containing equal pa

19、rts, by weight, ofcementitious material and fine aggregate, with sufficient waterto produce a grout efflux time by Test Method C 939 of 21 62 s. The cementitious material shall consist of two partsportland cement to one part of pozzolan, by weight.8.3.3.2 The test mixture shall contain grout fluidif

20、ier equalto 1% of the combined weight of portland cement pluspozzolan; unless otherwise recommended by the manufacturer.The control mixture shall contain no fluidifier.8.3.3.3 The volume of each batch shall be approximately0.03 m3(1 ft3).8.3.3.4 Mix grout in a mixer of the type shown in Fig. 1 ofPra

21、ctice C 938. Dampen the inside of the drum, start the mixerand charge ingredients within a period of 2 min in thefollowing order: water, fluidifier (if used), pozzolan, cement,and fine aggregate. Mix for 3 to 314 min.8.3.3.5 Determine time of efflux by Test Method C 939. Ifwithin acceptable range, p

22、roceed with tests to provide datarequired for the calculations.8.4 CalculationsCalculate the following items:8.4.1 Reduction in water requirement ( Rw):Rw5Wc2 Wt! 3 100Wc(1)where:Rw= reduction in water requirement, %,Wc= mass of water required in grout mixture withoutfluidifier, andWt= mass of water

23、 required in grout mixture with fluidi-fier.8.4.2 Increase in water retentivity ( Ir):Ir5Rt2 Rc! 3 100Rc(2)where:Ir= increase in water retentivity, %,Rc= time required to extract 60 mL of water from thecontrol sample without fluidifier, s, andRt= time required to extract 60 mL of water from the test

24、sample with fluidifier.8.5 ReportFor each grout mixture, the following test datashall be reported:8.5.1 Description and source of materials used,8.5.2 Material proportions by mass,8.5.3 Average time of grout efflux, s,8.5.4 Expansion and bleeding, %,8.5.5 Water retentivity, s,8.5.6 Initial setting t

25、ime, h,8.5.7 Final setting time, h,8.5.8 Compressive strength at 7 days, psi or MPa, and8.5.9 Compressive strength at 28 days, psi or MPa.8.5.10 The following computed values shall also be re-ported:8.5.11 Reduction in water requirement, Rw%,8.5.12 Increase in water retentivity, Ir%, and8.5.13 Compr

26、essive strength at 7 days, expressed as per-centage of control specimens, %.9. Rejection9.1 The fluidifier shall be rejected if it fails to meet any ofthe requirements of this specification.10. Packaging and Marking10.1 Grout fluidifier shall be packaged in moisture-resistantcontainers and stored in

27、 a dry covered area to prevent deterio-ration.10.2 Containers shall be marked to provide at least thefollowing information:10.2.1 A statement to the effect that the contained materialmeets the requirements of this specification.10.2.2 Weight of the contained material.10.2.3 Basic instructions for us

28、e of the material.10.2.4 Manufacturers lot number and date of manufacture.11. Keywords11.1 efflux time; fluidifier; grout; pre-placed aggregate;water demand; water retentivityC937022ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item

29、 mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical commi

30、ttee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a me

31、eting 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 International, 100 Barr Harbor Drive,

32、 PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C937023