1、Designation: C1610/C1610M 10Standard Test Method forStatic Segregation of Self-Consolidating Concrete UsingColumn Technique1This standard is issued under the fixed designation C1610/C1610M; the number immediately following the designation indicates theyear of original adoption or, in the case of rev
2、ision, 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*1.1 This test method covers the determination of staticsegregation of self-consolidating concrete by m
3、easuring thecoarse aggregate content in the top and bottom portions of acylindrical specimen (or column).1.2 This test method is not applicable to self-consolidatingconcrete containing lightweight aggregate.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as
4、standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard.1.4 The text of this standar
5、d references notes and footnotesthat provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.1.5 This test method is applicable under laboratory and fieldconditions.1.6 This standard does not purport to add
6、ress 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 regulatory limitations prior to use. (WarningFreshhydraulic cementitious mixtures are causti
7、c and may causechemical burns to skin and tissue upon prolonged exposure.2)2. Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete Ag-gregatesC127 Test Method for Density, Relative Density (SpecificGravity), and Absorption of Coarse AggregateC173/C173M Test Meth
8、od for Air Content of FreshlyMixed Concrete by the Volumetric MethodC192/C192M Practice for Making and Curing ConcreteTest Specimens in the LaboratoryC231 Test Method for Air Content of Freshly Mixed Con-crete by the Pressure MethodC1712 Test Method for Rapid Assessment of Static Segre-gation Resist
9、ance of Self-Consolidating Concrete UsingPenetration TestD1785 Specification for Poly(Vinyl Chloride) (PVC) PlasticPipe, Schedules 40, 80, and 1203. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method, referto Terminology C125.3.2 Definitions of Terms Specific to This
10、Standard:3.2.1 Static Segregation, nsettlement of coarse aggregateparticles in an undisturbed mass of fresh concrete.4. Summary of Test Method4.1 Asample of freshly-mixed self-consolidating concrete isplaced in a cylindrical mold without tamping or vibration. Themold is separated into three sections
11、 representing differentlevels of the cylindrical specimen (or column). Portions ofconcrete from the top and bottom section are washed on a 4.75mm (No. 4) sieve, leaving the coarse aggregate on the sieve.The masses of coarse aggregate in the top and the bottomsections are determined and the percent s
12、tatic segregation iscalculated.5. Significance and Use5.1 This test method provides users with a procedure todetermine the potential static segregation of self-consolidatingconcrete.NOTE 1This test method may not be sufficiently rapid to evaluateself-consolidating concrete mixtures in the field befo
13、re placement. Test1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.47 onSelf-Consolidating Concrete.Current edition approved Oct. 1, 2010. Published November 2010. Originallyapproved in 2006. Last
14、 previous edition approved in 2006 as C1610/C1610M06a.DOI: 10.1520/C1610_C1610M-10.2Section on Safety Precautions, Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards, Vol. 04.02.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service
15、at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-29
16、59, United States.Method C1712 provides a rapid method for assessing static segregationresistance of self-consolidating concrete.5.2 This test method shall be used to develop self-consolidating concrete mixtures with segregation not exceed-ing specified limits. Self-consolidating concrete is a fluid
17、concrete that can be prone to segregation if not proportioned tobe cohesive. A cohesive self-consolidating concrete is impor-tant for all applications but is especially critical for deep-section applications such as walls or columns. Therefore, thedegree of segregation can indicate if a mixture is s
18、uitable forthe application.NOTE 2Some level of segregation is tolerable as long as the desiredstrength and durability performance is achieved.6. Apparatus6.1 Balanceas described in Test Method C127.6.2 Column MoldThe column portion of the mold shall bepoly(vinyl chloride) (PVC) plastic pipe Schedule
19、 40 meetingthe requirements of Specification D1785. The column shall be8 in. 200 mm in nominal diameter 3 26 in. 660 mm inheight and separated into 3 sections. The top section shall be6.5 in. 165 mm in height, the middle section 13 in. 330 mmin height, and the bottom section 6.5 in. 165 mm in height
20、, asshown in Fig. 1. Each section shall have its ends flat and planeand be marked as “Top”, “ Middle”, or “Bottom” relative to itslocation in the column. Couplers, brackets, clamps, or otherequivalent fastening systems shall be used for securing thecolumn sections together to form a mortar-tight joi
21、nt and tosecure the column to the base plate. The column mold shall besecurely attached to a non-absorbent, rigid base plate measur-ing at least 12 in. 300 mm 3 12 in. 300 mm square.NOTE 3Experience has shown that a base plate made from sealed orlaminated plywood at least 0.75 in. 20 mm thick is sui
22、table for securingthe column.6.3 Collector PlateThe collector plate, used to obtainconcrete from the top section of the column, shall be made ofany nonabsorbent, rigid material measuring at least 20 in. 510mm 3 20 in. 510 mm square. The plate shall contain a cutout section in the center measuring 8.
23、7 in. 220 mm across andit shall contain a rigid lip that is at least 2 in. 50 mm highrunning around three sides of the perimeter of the plate, asshown in Fig. 2.NOTE 4To facilitate the ease with which the test can be performed,the collector plate may contain legs or another support system so that on
24、lyone person is needed to perform the concrete collection process from thetop section.FIG. 1 Detail of Column MoldC1610/C1610M 1026.4 Strike-off BarAs described in Test Method C173/C173M or Test Method C231.6.5 SieveA 4.75 mm (No. 4) rectangular sieve withminimum dimensions of 13 in. 330 mm 3 25 in.
25、 630 mm.6.6 Sample ReceptacleThe receptacle shall be a heavy-gage metal pan, wheelbarrow, or flat, clean nonabsorbent boardof sufficient capacity to allow easy remixing of the entiresample with a shovel, trowel, or scoop.6.7 Small ToolsTools and items such as shovels, plasticpails, trowels, scoops a
26、nd rubber gloves shall be provided.7. Sample7.1 Obtain a sample of freshly-mixed self-consolidatingconcrete in accordance with Practice C192/C192M and place itin the sample receptacle.8. Procedure8.1 Perform the column segregation test on a flat, levelsurface. Do not subject the testing surface and
27、the column moldto any vibration or disturbance.8.2 Remixing of Sample: Remix the sample obtained inaccordance with Section 7.1 in the sample receptacle using ashovel or scoop so that the concrete is homogeneous.8.3 Filling Procedure: Using a shovel, scoop, or plastic pail,immediately fill the column
28、 mold with concrete completely andabove the rim, within 2 min.8.4 After filling the mold, strike off the top surface bysliding the strike-off bar across the top rim of the mold with asawing motion until the concrete surface is level with the topof the mold.8.5 Allow the concrete to stand undisturbed
29、 in the columnmold for 15 6 1 min.8.6 Immediately following the standing period, securelyhold the top section of the mold and remove the fasteningsystem. Complete Steps 8.7 8.14 within 20 min thereafter.8.7 Place the cut out section of the collector plate around thecolumn just below the joint betwee
30、n the “Top” and “Middle”sections to catch and collect concrete.8.8 Grasp the upper section of the column mold and, usinga horizontal rotating motion, screed the concrete from the topsection of the column on to the collector plate and then depositit into a plastic pail.8.9 Repeat Steps 8.6 8.8 to rem
31、ove the concrete from themiddle section of the column mold and discard the concrete.8.10 Place the concrete sample collected from the uppersection of the column onto the 4.75 mm (No. 4) sieve.8.11 Wash the concrete on the 4.75 mm (No. 4) sieve so thatonly coarse aggregate remains on the sieve and th
32、en deposit thecoarse aggregate into a clean plastic pail.8.12 Repeat Steps 8.10 8.11 for the concrete retained inthe bottom section of the mold.8.13 Bring the coarse aggregate obtained from both the topand bottom sections of the column to a surface-dry conditionby rolling it in a large absorbent clo
33、th until all visible films ofwater are removed.8.14 Determine the mass of coarse aggregate from the topand bottom sections of the column to the nearest 0.1 lb 50 g.9. Calculation9.1 Calculate the percent static segregation using the fol-lowing equation:S 5 2FCAB CAT!CAB1 CAT!G* 100, if CAB. CATS 5 0
34、, if CAB#CATwhere:S = static segregation, percentCAT= mass of coarse aggregate in the top section of thecolumnFIG. 2 Detail of Collector PlateC1610/C1610M 103CAB= mass of coarse aggregate in the bottom section ofthe column10. Report10.1 Mixture designation.10.2 The mass of coarse aggregate obtained
35、from the topand bottom sections of the column separately to the nearest 0.1lb 0.05 kg.10.3 The static segregation to the nearest 0.1 percent.11. Precision and Bias11.1 PrecisionThe estimate of the precision of this testmethod is provisional. A repeatability standard deviation of0.2 % was obtained fr
36、om a study (1) involving five replicatebatches of a concrete mixture with a mean static segregation of3.8 %.11.2 BiasThe procedure used in this test method has nobias since coarse aggregate segregation of self-consolidatingconcrete is defined only in terms of this method.12. Keywords12.1 coarse aggr
37、egate; self-consolidating concrete; stability;static segregationREFERENCES(1) J., Assaad, K., H., Khayat, and J., Daczko, “Evaluation of StaticStability of Self-Consolidating Concrete”, ACI Materials Journal,Vol. 101, No. 3, May-June, 2004, pp. 207 215.SUMMARY OF CHANGESCommittee C09 has identified
38、the location of selected changes to this test method since the last issue,C1610/C1610M06a, that may impact the use of this test method. (Approved October 1, 2010)(1) Added new 1.5 to clarify the scope of this test method andrenumbered subsequent paragraphs.(2) Revised 5.1 to clarify the significance
39、 and use of this testmethod.(3) Added new Note 1 and renumbered subsequent notes.(4) Revised 6.2, 6.3, and Fig. 2 to clarify dimensions of thecollector plate.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standa
40、rd. 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 reviewe
41、d 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
42、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 Consh
43、ohocken, 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/).C1610/C1610M 104
