ASTM C1758 C1758M-2011 Standard Practice for Fabricating Test Specimens with Self-Consolidating Concrete《用自行胶结固化混凝土制造试样的标准操作规程》.pdf

1、Designation: C1758/C1758M 11Standard Practice forFabricating Test Specimens with Self-ConsolidatingConcrete1This standard is issued under the fixed designation C1758/C1758M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year

2、of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers procedures for fabricating testspecimens in the laboratory or field using a representativesamp

3、le of fresh self-consolidating concrete (SCC). This prac-tice is applicable to SCC with a nominal maximum aggregatesize up to 25 mm 1 in. and a slump flow of 500 mm 20 in.or greater.NOTE 1If the slump flow is less then 500 mm 20 in. follow thefabrication procedures described in the standard for whic

4、h the testspecimen is required.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may

5、 result in non-conformancewith the standard.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-priate safety and health practices and determine the applica-bility of regulat

6、ory limitations prior to use. (WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to exposed skin and tissue upon prolongedexposure.2)1.4 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding t

7、hose in tables and figures) shall not be consideredas requirements of the standard.2. Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete Ag-gregatesC172 Practice for Sampling Freshly Mixed ConcreteC192/C192M Practice for Making and Curing ConcreteTest Specimen

8、s in the LaboratoryC1611/C1611M Test Method for Slump Flow of Self-Consolidating Concrete3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this practice, refer toTerminology C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 test specimen, nself-consolidating concrete p

9、lacedin a mold, measure, measuring bowl, or other containerfollowing this standard with the top surface struck off andfinished following the standard for which the test specimen isrequired.4. Significance and Use4.1 Existing practices and test methods for fabricating freshconcrete test specimens are

10、 not suited to SCC. This practiceprovides requirements and procedures for fabricating testspecimens with SCC having a slump flow of 500 mm 20 in.or greater.5. Apparatus5.1 Specimen ContainerMolds, measures, measuringbowls, and containers used for fabricating test specimensaccording to this practice

11、shall conform to the requirementsdescribed in the standard for which the test specimen isrequired.5.2 Sample ReceptacleA pan or wheelbarrow that iswater-tight, has a nonabsorbent surface, and is large enough toretain a volume of concrete sufficient to fill all necessaryspecimen containers.5.3 Pourin

12、g Vessel for SCCA water-tight container hav-ing a size large enough so each amount of concrete obtainedfrom the sampling receptacle is representative and smallenough so concrete is not spilled during placement in thespecimen container.1This practice is under the jurisdiction of ASTM Committee C09 on

13、 Concreteand ConcreteAggregates and is the direct responsibility of Subcommittee C09.47 onSelf-Consolidating Concrete.Current edition approved Nov. 1, 2011. Published January 2012. DOI: 10.1520/C1758_C1758M-11.2See section on Safety Precautions, Manual of Aggregate and Concrete Testing,Annual Book o

14、f ASTM Standards, Vol. 04.02.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 1

15、00 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 2A pouring vessel with a pouring lip is useful in reducing theprobability of concrete spilling while filling the specimen container.5.4 Small ToolsItems such as shovels and scoops capableof remixing the concrete

16、in the sample receptacle, filling thepouring vessel, or both.6. Sampling Concrete6.1 The sample of concrete from which test specimens areto be fabricated shall be representative of the entire batch. Thesample shall be obtained in accordance with Practice C172 orPractice C192/C192M.7. Procedure7.1 Me

17、asure and record the slump flow of the sampledconcrete in accordance with Test Method C1611/C1611M. Forconcrete with a slump flow of 500 mm 20 in. or greater,fabricate test specimens as follows.7.2 Identify, position, and prepare the specimen container,and any related equipment, as described in the

18、practice or testmethod for which the test specimen is required.7.3 Fill the pouring vessel with a representative portion ofSCC from the sample receptacle, either by passing the pouringvessel through the SCC or by scooping concrete into the vessel.7.4 Fill the specimen container with SCC by tilting a

19、nd thenmoving the pouring vessel around the perimeter of the con-tainer to allow the SCC to flow into the container and to ensurean even distribution of concrete.7.5 During the filling process, position the lowest point onthe rim of the pouring vessel no more than 125 mm 5 in.above the top of the co

20、ntainer. If necessary, repeat theprocedures in 7.3 and 7.4, without rodding the concrete ortapping the sides of the specimen container, until the containeris overfilled slightly above its rim.7.6 After filling, follow all subsequent specimen fabricationand testing procedures as specified in the prac

21、tice or testmethod for which the test specimen is required.8. Keywords8.1 fabricate; self-consolidating concrete; slump flow;specimen container; test specimensASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this stand

22、ard. 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 committee and must be review

23、ed 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 meeting of theresponsible

24、 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, PO Box C700, West Cons

25、hohocken, 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/).C1758/C1758M 112