1、Designation: C 1610/C 1610M 06aStandard Test Method forStatic Segregation of Self-Consolidating Concrete UsingColumn Technique1This standard is issued under the fixed designation C 1610/C 1610M; the number immediately following the designation indicates theyear of original adoption or, in the case o
2、f revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon (e) 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 concret
3、e by measuring 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 inch-pounds or SI units are tobe regarded separately as
4、 standard. Within the text, the SI unitsare shown in brackets. The values stated in each system are notexact equivalents; therefore, each system shall be used inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with the standard.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 standard does not purport to address all of thesafety concerns, if any, associated with its use. It is t
6、heresponsibility 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 caustic and may causechemical burns to skin and tissue upon prolonged exposure
7、.2)2. Referenced Documents2.1 ASTM Standards:3C 125 Terminology Relating to Concrete and ConcreteAggregatesC 127 Test Method for Density, Relative Density (SpecificGravity), and Absorption of Coarse AggregateC 173/C 173M Test Method for Air Content of FreshlyMixed Concrete by the Volumetric MethodC
8、192/C 192M Practice for Making and Curing ConcreteTest Specimens in the LaboratoryC 231 Test Method for Air Content of Freshly MixedConcrete by the Pressure MethodD 1785 Specification for Poly(Vinyl Chloride) (PVC) Plas-tic Pipe, Schedules 40, 80, and 1203. Terminology3.1 Definitions:3.1.1 For defin
9、itions of terms used in this test method, referto Terminology C 125.3.2 Definitions of Terms Specific to This 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
10、concrete isplaced in a cylindrical mold without tamping or vibration. Themold is separated into three sections 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
11、 the sieve.The masses of coarse aggregate in the top and the bottomsections are determined and the percent static segregation iscalculated.5. Significance and Use5.1 This test method provides users with a laboratoryprocedure to determine the potential static segregation ofself-consolidating concrete
12、.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 fluidconcrete that can be prone to segregation if not proportioned tobe cohesive. A cohesive self-consolidating concrete is impor-tan
13、t 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 suitable forthe application.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates
14、and is the direct responsibility of SubcommitteeC09.47 on Self-Consolidating Concrete.Current edition approved Dec. 15, 2006. Published January 2007. Originallyapproved in 2006. Last previous edition approved in 2006 as C 1610/C 1610M 06.2Section on Safety Precautions, Manual of Aggregate and Concre
15、te Testing,Annual Book of 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.1*A Summ
16、ary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 1Some level of segregation is tolerable as long as the desiredstrength and durability performance is achieved.6. Apparatus
17、6.1 Balanceas described in Test Method C 127.6.2 Column MoldThe column portion of the mold shall bepoly(vinyl chloride) (PVC) plastic pipe Schedule 40 meetingthe requirements of Specification D 1785. The column shall be8 in. 200 mm in diameter 3 26 in. 660 mm in height andseparated into 3 sections.
18、The top section shall be 6.5 in. 165mm in height, the middle section 13 in. 330 mm in height,and the bottom section 6.5 in. 165 mm in height, as shown inFig. 1. Each section shall have its ends flat and plane and bemarked as “Top”, “ Middle”, or “Bottom” relative to itslocation in the column. Couple
19、rs, brackets, clamps, or otherequivalent fastening systems shall be used for securing thecolumn sections together to form a mortar-tight joint 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
20、 12 in. 300 mm square.NOTE 2Experience has shown that a base plate made from sealed orlaminated plywood at least 0.75 in. 20 mm thick is suitable for securingthe column.6.3 Collector PlateThe collector plate, used to obtainconcrete from the top section of the column, shall be made ofany nonabsorbent
21、, 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 8.5 in. 215 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
22、.NOTE 3To facilitate the ease with which the test can be performed,the collector plate may contain legs or another support system so that onlyone person is needed to perform the concrete collection process from thetop section.6.4 Strike-off BarAs described in Test Method C 173/C 173M or Test Method
23、C 231.6.5 SieveA 4.75 mm No. 4 rectangular sieve withminimum dimensions of 13 in. 330 mm 3 25 in. 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,
24、 trowel, or scoop.6.7 Small ToolsTools and items such as shovels, plasticpails, trowels, scoops and rubber gloves shall be provided.FIG. 1 Detail of Column MoldC 1610/C 1610M 06a27. Sample7.1 Obtain a sample of freshly-mixed self-consolidatingconcrete in accordance with Practice C 192/C 192M and pla
25、ceit in the sample receptacle.8. Procedure8.1 Perform the column segregation test on a flat, levelsurface. Do not subject the testing surface and 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 us
26、ing ashovel or scoop so that the concrete is homogeneous.8.3 Filling Procedure: Using a shovel, scoop, or plastic pail,immediately fill the column 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 t
27、he 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 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.
28、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 between 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, scre
29、ed 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 remove 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
30、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 then 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
31、 coarse aggregate obtained from both the topand bottom sections of the column to a surface-dry conditionby rolling it in a large absorbent cloth 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
32、 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, if CAB#CATwhere:S = static segregation, percentCAT= mass of coarse aggregate in the top section of thecolumnCAB= mass of coarse aggregate in the bottom sect
33、ion ofthe column10. Report10.1 Mixture designation.10.2 The mass of coarse aggregate obtained 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
34、 of this testmethod is provisional. A repeatability standard deviation ofFIG. 2 Detail of Collector PlateC 1610/C 1610M 06a30.2 % was obtained from 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
35、 has nobias since coarse aggregate segregation of self-consolidatingconcrete is defined only in terms of this method.12. Keywords12.1 coarse aggregate; self-consolidating concrete; stability;static segregationREFERENCES(1) J., Assaad, K., H., Khayat, and J., Daczko, “Evaluation of StaticStability of
36、 Self-Consolidating Concrete”, ACI Materials Journal, Vol.101, No. 3, May-June, 2004, pp. 207 215.SUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this test method since the last issue,C 1610/C 1610M 06, that may impact the use of this test method. (Approved Decembe
37、r 15, 2006)(1) Revised the definition of static segregation.(2) Revised 1.2.(3) Replaced reference to Practice C 172 with Test MethodC 231.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this s
38、tandard 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 every five years
39、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 technical committee
40、, 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 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).C 1610/C 1610M 06a4
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