1、Designation: C937 16Standard 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 U.S. Department of Defense.1. Scope*1.1 This specification covers fluidifier for grout u
3、sed forpreplaced-aggregate (PA) concrete.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 The following precautionary caveat pertains only to thetest method portion, Section 8, of this standard: This standarddoes not purp
4、ort 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:2C33/C33
5、M Specification for Concrete AggregatesC125 Terminology Relating to Concrete and Concrete Ag-gregatesC150/C150M Specification for Portland CementC219 Terminology Relating to Hydraulic CementC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC637 Specification
6、for Aggregates for Radiation-ShieldingConcreteC938 Practice for Proportioning Grout Mixtures forPreplaced-Aggregate ConcreteC939/C939M 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-Agg
7、regate Concrete 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-A
8、ggregate Concrete 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-ri
9、al shall meet 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/C150M for the type to be used.5.1.2 Pozzolan shall meet the requirements of SpecificationC618.5
10、.1.3 Fine aggregate shall meet the requirements of Speci-fication C33/C33M except that grading shall conform toSpecification C637, Table number 2, Grading 1 for FineAggregate.6. Physical Requirements6.1 The fluidifier, when tested in grout as specified herein,shall conform to the requirements of Tab
11、le 1.7. Sampling7.1 The test sample of fluidifier shall have a mass of at least225 g and shall be representative of the material supplied. Iffeasible, the test sample shall be composited from grab samplestaken from not fewer than four packages selected at random.8. Test Methods8.1 Summary of MethodP
12、hysical properties of grout con-taining fluidifier are determined and compared with corre-sponding properties of grout made without fluidifier.1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.41
13、 on Hydraulic Cement Grouts.Current edition approved Feb. 1, 2016. Published March 2016. Originallyapproved in 1980. Last previous edition approved in 2010 as C93710. DOI:10.1520/C0937-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service
14、astm.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 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United S
15、tates18.2 Significance and UseThe effects of adding fluidifier toa standard grout mixture are determined in order to evaluate itsability to reduce mixing water, prevent early stiffening, holdsolid constituents in suspension, produce controlled expansionprior to initial setting, and maintain or incre
16、ase compressivestrength.8.3 Procedure:8.3.1 Have all grout materials including mixing water at23.0 6 2.0C at the start of the test.8.3.2 Maintain the laboratory and curing room at 23.0 62.0C at all times during testing.8.3.3 Grout Preparation:8.3.3.1 Proportion two grout mixtures, one a control mix-
17、ture without and one a test mixture with the grout fluidifierunder consideration, each containing equal parts, by mass, ofcementitious material and fine aggregate, with sufficient waterto produce a grout efflux time by Test Method C939/C939M of21 6 2 s. The cementitious material shall consist of two
18、 partsportland cement to one part of pozzolan, by mass.8.3.3.2 The test mixture shall contain grout fluidifier equalto 1% of the combined mass of portland cement plus pozzolan;unless otherwise recommended by the manufacturer. Thecontrol mixture shall contain no fluidifier.8.3.3.3 The volume of each
19、batch shall be approximately0.03 m3.8.3.3.4 Mix grout in a mixer of the type shown in Fig. 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
20、 3 to 314 min.8.3.3.5 Determine time of efflux by Test Method C939/C939M. If within acceptable range, proceed with tests toprovide data required for the calculations.8.4 CalculationsCalculate the following items:8.4.1 Reduction in water requirement (Rw):Rw5Wc2 Wt! 3100Wc(1)where:Rw= reduction in wat
21、er requirement, %,Wc= mass of water required in grout mixture withoutfluidifier, andWt= mass of water required in grout mixture with fluidifier.8.4.2 Increase in water retentivity (Ir):Ir5Rt2 Rc!3100Rc(2)where:Ir= increase in water retentivity, %,Rc= time required to extract 60 mL of water from thec
22、ontrol sample without fluidifier, s, andRt= time required to extract 60 mL of water from the testsample with fluidifier.8.5 Determine the expansion, 3 h after mixing, using TestMethod C940.8.6 Determine the bleeding, 3 h after mixing, using TestMethod C940.8.7 Determine the increase in water retenti
23、vity using TestMethod C941.8.8 Determine the initial and final time of setting using TestMethod C953.8.9 Determine the compressive strength at 7 days and 28days using Test Method C942.9. Report9.1 ReportFor each grout mixture, the following test datashall be reported:9.1.1 Description and source of
24、materials used,9.1.2 Material proportions by mass,9.1.3 Average time of grout efflux, s,9.1.4 Expansion and bleeding, %,9.1.5 Water retentivity, s,9.1.6 Initial setting time, h,9.1.7 Final setting time, h,9.1.8 Compressive strength at 7 days, MPa, and9.1.9 Compressive strength at 28 days, MPa.9.1.10
25、 The following computed values shall also be re-ported:9.1.11 Reduction in water requirement, Rw%,9.1.12 Increase in water retentivity, Ir%, and9.1.13 Compressive strength at 7 days, expressed as per-centage of control specimens, %.TABLE 1 Physical Requirements for Grout with FluidifierReduction in
26、mixing water,min, % of control(Test Method C939/C939M)3Expansion Limits, %: . . .Expansion, 3 h after mixing,(Test Method C940)with the fluidifier: . . .0.80 or more Alkali Content of Cement,% expressed as Na2O7to140.40 to 0.79 Alkali Content of Cement,% expressed as Na2O520.39 or less Alkali Conten
27、t of Cement,% expressed as Na2O 3 to 9Bleeding, 3 h after mixing,(Test Method C940),max, % with the fluidifier 2Increase in water retentivity(Test Method C941),min, % of control 60Initial setting time, min, h(Test Method C953)4Final setting time, max, h(Test Method C953)24Compressive strength at7 da
28、ys and 28 days,(Test Method C942),min, % of control 90C937 16210. Rejection10.1 The purchaser has the right to reject material that failsto conform to the requirements of this specification. Rejectionshall be reported to the producer or supplier in writing.11. Packaging and Marking11.1 Grout fluidif
29、ier shall be packaged in moisture-resistantcontainers and stored 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.
30、2 Mass of the contained material.11.2.3 Basic instructions 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 retentivitySUMMARY OF CHANGESCommittee C09 has identified the location
31、of selected changes to this specification since the last issue,C93710, that may impact the use of this specification. (Approved Feb. 1, 2016.)(1) Removed inch-pound units statement from 1.2 and inch-pound units throughout.(2) Consolidated physical requirements into new Table 1.(3) Added requirements
32、 to test material in accordance with themethods listed in Table 1.(4) Revised 11.2.2 (formerly 10.2.2) to conform to Subcom-mittee C09.95 recommendation.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. U
33、sers 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 committee and must be reviewed eve
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