1、Designation: C937 10Standard Specification forGrout Fluidifier for Preplaced-Aggregate Concrete1This standard is issued under the fixed designation C937; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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. Scope*1.1 This specification covers fluidifier for grout used f
3、orpreplaced-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 9, of this standard: This standarddoes not
4、 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:2C3
5、3 Specification for Concrete AggregatesC125 Terminology Relating to Concrete and Concrete Ag-gregatesC150 Specification for Portland CementC219 Terminology Relating to Hydraulic CementC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC637 Specification for Ag
6、gregates for Radiation-ShieldingConcreteC938 Practice for Proportioning Grout Mixtures forPreplaced-Aggregate ConcreteC939 Test Method for Flow of Grout for Preplaced-Aggregate Concrete (Flow Cone Method)C940 Test Method for Expansion and Bleeding of FreshlyMixed Grouts for Preplaced-Aggregate Concr
7、ete in theLaboratoryC941 Test Method for Water Retentivity of Grout Mixturesfor Preplaced-Aggregate Concrete in the LaboratoryC942 Test Method for Compressive Strength of Grouts forPreplaced-Aggregate Concrete in the LaboratoryC953 Test Method for Time of Setting of Grouts forPreplaced-Aggregate Con
8、crete in the Laboratory3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method, referto Terminologies C125 and C219.4. Ordering Information4.1 The purchaser shall specify the material desired as“grout fluidifier for preplaced-aggregate concrete.” The mate-rial shall mee
9、t the requirements of this specification.5. Materials5.1 Grout ingredients shall conform to the following re-quirements:5.1.1 Portland cement shall meet the requirements of Speci-fication C150 for the type to be used.5.1.2 Pozzolan shall meet the requirements of SpecificationC618.5.1.3 Fine aggregat
10、e shall meet the requirements of Speci-fication C33 except that grading shall conform to SpecificationC637, Table number 2, Grading 1 for Fine Aggregate.6. Physical Requirements Physical Requirements6.1 The fluidifier, when tested in grout as specified herein,shall conform to the following requireme
11、nts:Reduction in mixing water, min, % of control(Test Method C941)3Expansion, 3 h after mixing,(Test Method C940) See Table 11This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.41 on Hydraulic Ceme
12、nt Grouts.Current edition approved June 15, 2010. Published July 2010. Originallyapproved in 1980. Last previous edition approved in 2002 as C93702. DOI:10.1520/C0937-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annu
13、al Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.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 91*A Summary of Changes section appears at the
14、 end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Bleeding, 3 h after mixing, (Test Method C940),max, % 2Increase in water retentivity (Test Method C941),min, % of control 60Initial setting time, min, h (Test Metho
15、d C953)4Final setting time, max, h (Test Method C953)24Compressive strength at 7 days and 28 days, (TestMethod C942), min, % of control 907. Composition7.1 The fluidifier shall be composed of materials that willyield a product having the properties stipulated under PhysicalRequirements when tested i
16、n accordance with this specifica-tion.8. Sampling8.1 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 rand
17、om.9. Test Method9.1 Summary of MethodPhysical properties of grout con-taining fluidifier are determined and compared with corre-sponding properties of grout made without fluidifier.9.2 Significance and UseThe effects of adding fluidifier toa standard grout mixture are determined in order to evaluat
18、e itsability to reduce mixing water, prevent early stiffening, holdsolid constituents in suspension, produce controlled expansionprior to initial setting, and maintain or increase compressivestrength.9.3 Procedure:9.3.1 Have all grout materials including mixing water at23.0 6 2.0C (73.5 6 3.5F) at t
19、he start of the test.9.3.2 Maintain the laboratory and curing room at 23.0 62.0C (73.5 6 3.5F) at all times during testing.9.3.3 Grout Preparation:9.3.3.1 Proportion two grout mixtures, one a control mix-ture without and one a test mixture with the grout fluidifierunder consideration, each containin
20、g equal parts, by weight, ofcementitious material and fine aggregate, with sufficient waterto produce a grout efflux time by Test Method C939 of 21 6 2s. The cementitious material shall consist of two parts portlandcement to one part of pozzolan, by weight.9.3.3.2 The test mixture shall contain grou
21、t fluidifier equalto 1% of the combined weight of portland cement pluspozzolan; unless otherwise recommended by the manufacturer.The control mixture shall contain no fluidifier.9.3.3.3 The volume of each batch shall be approximately0.03 m3(1 ft3).9.3.3.4 Mix grout in a mixer of the type shown in Fig
22、. 1 ofPractice C938. 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.9.3.3.5 Determine time of efflux by Test Method C939.Ifwithin acceptable ra
23、nge, proceed with tests to provide datarequired for the calculations.9.4 CalculationsCalculate the following items:9.4.1 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
24、 water required in grout mixture with fluidi-fier.9.4.2 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 th
25、e testsample with fluidifier.9.5 ReportFor each grout mixture, the following test datashall be reported:9.5.1 Description and source of materials used,9.5.2 Material proportions by mass,9.5.3 Average time of grout efflux, s,9.5.4 Expansion and bleeding, %,9.5.5 Water retentivity, s,9.5.6 Initial set
26、ting time, h,9.5.7 Final setting time, h,9.5.8 Compressive strength at 7 days, psi or MPa, and9.5.9 Compressive strength at 28 days, psi or MPa.9.5.10 The following computed values shall also be re-ported:9.5.11 Reduction in water requirement, Rw%,9.5.12 Increase in water retentivity, Ir%, and9.5.13
27、 Compressive strength at 7 days, expressed as per-centage of control specimens, %.10. Rejection10.1 The fluidifier shall be rejected if it fails to meet any ofthe requirements of this specification.11. Packaging and Marking11.1 Grout fluidifier shall be packaged in moisture-resistantcontainers and s
28、tored in a dry covered area to prevent deterio-ration.11.2 Containers shall be marked to provide at least thefollowing information:11.2.1 A statement to the effect that the contained materialmeets the requirements of this specification.11.2.2 Weight of the contained material.11.2.3 Basic instruction
29、s for use of the material.11.2.4 Manufacturers lot number and date of manufacture.12. Keywords12.1 efflux time; fluidifier; grout; pre-placed aggregate;water demand; water retentivityC937 102SUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this specification since t
30、he last issue,C93702, that may impact the use of this specification. (Approved June 15, 2010)(1) Added new Section 3 Terminology to reference appropriateterminology documents under C01 and C09 and renumberedsubsequent sections.ASTM International takes no position respecting the validity of any paten
31、t rights asserted in connection with any item 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 a
32、t any time by the responsible technical committee 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 commen
33、ts will receive careful consideration at a meeting 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
34、by ASTM International, 100 Barr Harbor Drive, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C937 103
