1、Designation: C1610/C1610M 17Standard 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 (SCC
3、) by measuringthe coarse aggregate content in the top and bottom portions ofa cylindrical 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 separate
4、ly 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 result in non-conformancewith the standard.1.4 The text of this standard references notes and footnotesthat provide e
5、xplanatory 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 address all of thesafety concerns, if any, associ
6、ated 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 caustic and may causechemical burns to skin and tiss
7、ue upon prolonged exposure.2)1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Orga
8、nization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete Ag-gregatesC127 Test Method for Relative Density (Specific Gravity)and Absorption of Coarse AggregateC173/C173M Test Method forAir Content of Freshly Mixe
9、dConcrete by the Volumetric MethodC192/C192M Practice for Making and Curing Concrete TestSpecimens 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 Resistance of Self-Consolidating Concret
10、e UsingPenetration TestC1758/C1758M Practice for Fabricating Test Specimenswith Self-Consolidating ConcreteD1785 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 Terminolo
11、gy C125.3.2 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 concrete isplaced in a cylindrical mold without tamping or v
12、ibration. Themold is separated into three sections representing differentlevels of the cylindrical specimen (or column). Portions ofSCC from the top and bottom section are washed on a 4.75 mm(No. 4) sieve, leaving the coarse aggregate on the sieve. Themasses of coarse aggregate in the top and the bo
13、ttom sectionsare determined and the percent static segregation is calculated.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.47 on Self-Consolidating Concrete.Current edition approved June 15, 20
14、17. Published July 2017. Originallyapproved in 2006. Last previous edition approved in 2014 as C1610/C1610M 14.DOI: 10.1520/C1610_C1610M-17.2Section on Safety Precautions, Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards, Vol 04.02.3For referenced ASTM standards, visit the ASTM
15、 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Har
16、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendat
17、ions issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15. 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 eval
18、uateself-consolidating concrete mixtures in the field before placement. TestMethod 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-in
19、g 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-tant for all applications but is especially critical for deep-section applications such as walls or columns. Therefor
20、e, thedegree of segregation can indicate if a mixture is suitable 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 mol
21、d shall bepoly(vinyl chloride) (PVC) plastic pipe Schedule 40 meetingthe requirements of Specification D1785. The column shall be200 mm 8 in. in nominal diameter by 660 mm 26 in. inheight and separated into 3 sections. The top section shall be165 mm 6.5 in. in height, the middle section 330 mm 13 in
22、.in height, and the bottom section 165 mm 6.5 in. in height, 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 secu
23、ring 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 300 mm 12 in. by 300 mm 12 in. square.NOTE 3Experience has shown that a base plate made from sea
24、led orlaminated plywood at least 20 mm 0.75 in. thick is suitable for securingthe column.6.3 Collector PlateThe collector plate, used to obtainSCC from the top section of the column, shall be made of anynonabsorbent, rigid material measuring at least 510 mm. 20in by 510 mm 20 in. square. The plate s
25、hall contain a cutoutFIG. 1 Detail of Column MoldC1610/C1610M 172section in the center measuring 220 mm 8.7 in. across and itshall contain a rigid lip that is at least 50 mm 2 in. highrunning around three sides of the perimeter of the plate, asshown in Fig. 2.NOTE 4To facilitate the ease with which
26、the test can be performed, thecollector plate may contain legs or another support system so that only oneperson is needed to perform the SCC collection process from the topsection.6.4 Strike-off BarAs described in Test Method C173/C173M or Test Method C231.6.5 SieveA 4.75 mm (No. 4) rectangular siev
27、e withminimum dimensions of 330 mm 13 in. by 630 mm 25 in.6.6 Sample ReceptacleA pan or wheelbarrow that iswater-tight, has a nonabsorbent surface, and is large enough toallow both remixing of the entire sample and retain a volumeof SCC sufficient to fill the column mold.6.7 Other ToolsItems such as
28、 shovels and scoops capableof remixing the SCC in the sample receptacle, filling thepouring vessel, or both.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 this test on a flat
29、, level work surface. Do notsubject the work surface or the column mold to vibration ordisturbance.8.2 Remixing of Sample: Remix the sample obtained inaccordance with 7.1 in the sample receptacle using a shovel orscoop so that the SCC is homogeneous.8.3 Dampen the interior of the mold, removing any
30、standingwater on the base plate within the column.8.4 Fill the mold with SCC in accordance with PracticeC1758/C1758M. Completely fill the mold within 2 min.8.5 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
31、 SCC surface is level with the top of themold.8.6 Allow the SCC to stand undisturbed in the mold for 156 1 min.8.7 Immediately following the standing period, securelyhold the top section of the mold and remove the fasteningsystem. Complete Steps 8.8 8.15 within 20 min thereafter.8.8 Place the cutout
32、 section of the collector plate around thecolumn just below the joint between the “Top” and “Middle”sections to catch and collect SCC.8.9 Grasp the upper section of the mold and, using ahorizontal rotating motion, screed the SCC in the top section ofthe column on to the collector plate and then depo
33、sit it into aplastic pail.8.10 Repeat Steps 8.7 8.9 to remove the SCC from themiddle section of the mold. Discard this SCC.8.11 Place the SCC sample collected from the upper sectionof the mold onto the 4.75 mm (No. 4) sieve.8.12 Wash the SCC on the 4.75 mm (No. 4) sieve so thatonly coarse aggregate
34、remains on the sieve. Deposit the coarseaggregate into a clean plastic pail.8.13 Repeat Steps 8.11 and 8.12 for the SCC retained in thebottom section of the mold.8.14 Bring the coarse aggregate obtained from both the topand bottom sections of the mold to a surface-dry condition byrolling it in a lar
35、ge absorbent cloth until all visible films ofwater are removed.8.15 Determine the mass of coarse aggregate from the topand bottom sections of the mold to the nearest 50 g 0.1 lb.FIG. 2 Detail of Collector PlateC1610/C1610M 1739. Calculation9.1 Calculate the percent static segregation using the fol-l
36、owing equation:S 5 2FCAB2 CAT!CAB1CAT!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 section of thecolumn10. Report10.1 Mixture designation.10.2 The mass of coarse aggregat
37、e obtained from the topand bottom sections of the column separately to the nearest0.05 kg 0.1 lb.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
38、obtained from a study (1)4involving five replicatebatches of a SCC 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 coars
39、e aggregate; 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,Vol101, No. 3, May-June, 2004, pp. 207215.SUMMARY OF CHANGESCommittee C09 has identifi
40、ed the location of selected changes to this standard since the last issue(C1610/C1610M 14) that may impact the use of this standard. (Approved June 15, 2017.)(1) Added Practice C1758/C1758M to Referenced Documents.(2) Section 8Replaced the filling procedure with a referenceto Practice C1758/C1758M.A
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