1、Designation:C174118Standard Test Method forBleed Stability of Cementitious Post-Tensioning TendonGrout1This standard is issued under the fixed designation C1741;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisio
2、n.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method is designed to determine the bleedstability of freshly-mixed cementitious grout under staticpressure.1.2 UnitsThe val
3、ues stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.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
4、 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.2)1.4 This international standard was developed in accor-dance with internatio
5、nally 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 Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3C125 Terminolo
6、gy Relating to Concrete and Concrete Ag-gregatesC938 Practice for Proportioning Grout Mixtures forPreplaced-Aggregate Concrete3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 bleed stabilit
7、y,nof cementitious grout,resistance tobleeding.3.2.2 bleeding,nof cementitious post-tensioning tendongrout,autogenous flow of mixing water within,or its emer-gence from,newly placed grout;caused by the settlement ofthe solid materials within the grout and the filtering action ofstrands and wires whe
8、n subjected to static pressure andcapillary action.3.2.3 grout,nmixture of cementitious material and water,with or without aggregate and admixtures,proportioned toproduce a pourable consistency without segregation of theconstituents.3.2.4 post-tensioning,adjreferring to a method of pre-stressing in
9、which prestressing steel is tensioned after theconcrete has gained sufficient strength.4.Significance and Use4.1 This test method is designed to evaluate the bleedstability of a freshly-mixed grout under static pressure.It canbe used in both the laboratory to qualify grout materials and inthe field
10、as a quality control test.When used to qualify groutmaterials,replicate tests may be specified.It is intended thatthe test pressure,acceptance criteria,and number of replicatetests be set forth in the contract documents if this test methodis referenced.These values will normally vary depending onthe
11、 vertical rise of the post-tensioning tendon.NOTE1Appendix X1 includes a reference for an example of testpressures and bleeding limits.4.2 The procedure for this test was developed by Schokkeret al.4based on previous work by Schupack.55.Apparatus5.1 The apparatus consists of a commercially available
12、pressure filtration funnel,stand,pressure supply with gauge,1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.41 on Hydraulic Cement Grouts.Current edition approved Oct.1,2018.Published October 201
13、8.Originallyapproved in 2011.Last previous edition approved in 2012 as C1741 12.DOI:10.1520/C1741-18.2Section 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 Custo
14、mer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Schokker,A.J.,Koester,B.D.,Breen,J.E.,and Kreger,M.E.,“Developmentof High Performance Grouts for Bonded Post-Tensioned Structures,”ResearchReport 1405-2
15、,Center for Transportation Research,October 1999.5Schupack,M.“Admixture for Controlling Bleed in Cement Grout Used inPost-Tensioning,”Precast/Prestressed Concrete Institute Journal,Nov.Dec.1974,pp.110.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 B
16、arr Harbor 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 Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 pressure regulator,valve,drip wick,and bleed water collectioncontainer as shown in Fig.1 and Fig.2.5.1.1 Filtr
