ASTM C1758 C1758M-2013 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 11C1758/C1758M 13Standard 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 revi

2、sion, the year 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. Scope Scope*1.1 This practice covers procedures for fabricating test specimens in the laboratory or field usi

3、ng a representative sample offresh self-consolidating concrete (SCC). This practice is applicable to SCC with a nominal maximum aggregate size up to 25 mm1 in. and a slump flow of 500 mm 20 in. or greater. If the slump flow is less than 500 mm 20 in. follow the fabricationprocedures described in the

4、 standard for which the test specimen is required.NOTE 1If the slump flow is less then 500 mm 20 in. follow the fabrication procedures described in the standard for which the test specimen isrequired.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standa

5、rd. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.3 This standard does not purport to address all of the safety concerns, if any, as

6、sociated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use. (WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposedski

7、n and tissue upon prolonged exposure.2)1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be considered as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:3

8、C125 Terminology Relating to Concrete and Concrete AggregatesC172 Practice for Sampling Freshly Mixed ConcreteC192/C192M Practice for Making and Curing Concrete Test Specimens in the LaboratoryC1611/C1611M Test Method for Slump Flow of Self-Consolidating Concrete3. Terminology3.1 Definitions:3.1.1 F

9、or definitions of terms used in this practice, refer to Terminology C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 test specimen, nself-consolidating concrete placed in a mold, measure, measuring bowl, or other container following thisstandard with the top surface struck off and finis

10、hed following the standard for which the test specimen is required.4. Significance and Use4.1 Existing practices and test methods for fabricating fresh concrete test specimens are not suited to SCC. This practiceprovides requirements and procedures for fabricating test specimens with SCC having a sl

11、ump flow of 500 mm 20 in. or greater.1 This practice is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.47 onSelf-Consolidating Concrete.Current edition approved Nov. 1, 2011June 1, 2013. Published January 2012July

12、 2013. Originally approved in 2011. Last previous edition approved in 2011 asC1758/C1758M-11. DOI: 10.1520/C1758_C1758M-11.2 See section on Safety Precautions, Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards, Vol. 04.02.3 For referencedASTM standards, visit theASTM website, ww

13、w.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of wh

14、at changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered th

15、e official document.*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 States15. Apparatus5.1 Specimen ContainerMolds, measures, measuring bowls, and containers used for fabricati

16、ng test specimens according tothis practice shall conform to the requirements described in the standard for which the test specimen is required.5.2 Sample ReceptacleA pan or wheelbarrow that is water-tight, has a nonabsorbent surface, and is large enough to retain avolume of concrete sufficient to f

17、ill all necessary specimen containers.5.3 Pouring Vessel for SCCA water-tight container having a size large enough so each amount of concrete obtained from thesampling receptacle is representative and small enough so concrete is not spilled during placement in the specimen container.NOTE 1A pouring

18、vessel with a pouring lip is useful in reducing the probability of concrete spilling while filling the specimen container.5.4 Small ToolsItems such as shovels and scoops capable of remixing the concrete in the sample receptacle, filling the pouringvessel, or both.6. Sampling Concrete6.1 The sample o

19、f concrete from which test specimens are to be fabricated shall be representative of the entire batch. The sampleshall be obtained in accordance with Practice C172 or Practice C192/C192M.7. Procedure7.1 Measure and record the slump flow of the sampled concrete in accordance with Test Method C1611/C1

20、611M. For concretewith 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 practice or test methodfor which the test specimen is required.7.3 Fill the pouring vessel w

21、ith a representative portion of SCC from the sample receptacle, either by passing the pouring vesselthrough the SCC or by scooping concrete into the vessel.7.4 Fill the specimen container with SCC by tilting and then moving the pouring vessel around the perimeter of the containerto allow the SCC to

22、flow into the container and to ensure an even distribution of concrete.7.5 During the filling process, position the lowest point on the rim of the pouring vessel no more than 125 mm 5 in. abovethe top of the container. If necessary, repeat the procedures in 7.3 and 7.4, without rodding the concrete

23、or tapping the sides ofthe specimen container, until the container is overfilled slightly above its rim.7.6 After filling, follow all subsequent specimen fabrication and testing procedures as specified in the practice or test methodfor which the test specimen is required.8. Keywords8.1 fabricate; se

24、lf-consolidating concrete; slump flow; specimen container; test specimensSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this test method since the last issue,C1758/C1758M11, that may impact the use of this test method. (Approved June 1, 2013)(1) Old Note 1 moved t

25、o 1.1.ASTM International takes no position respecting the validity of any patent 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 right

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28、mmittee on Standards, at the address shown below.This standard is copyrighted 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/).C1758/C1758M 132