1、Designation:C 1398 07Standard Test Method forThe Laboratory Determination of the Time of Setting ofHydraulic-Cement Mortars Containing Additives forShotcrete by the Use of Gillmore Needles1This standard is issued under the fixed designation C 1398;the number immediately following the designation ind
2、icates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This is a laboratory test method that covers t
3、he deter-mination of the time of setting of hydrauliccement mortarscontaining additives for shotcrete for comparison with controlmixes containing no additives or to compare the performanceof shotcrete mixtures which contain additives that producerapid setting or rapid stiffening of shotcrete.1.2 The
4、 values stated in SI units(see IEEE/ASTM SI 10)are the standard.1.3 This standard may involve hazardous materials,opera-tions,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestabl
5、ish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C 125 Terminology Relating to Concrete and ConcreteAggregatesC 150 Specification for Portland CementC 185 Test Method for Air Content of Hydra
6、ulic CementMortarC 266 Test Method for Time of Setting of Hydraulic-Cement Paste by Gillmore NeedlesC 305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC 490 Practice for Use of Apparatus for the Determinationof Length Change of Hardened Cement Paste,Mort
7、ar,andConcreteC 778 Specification for Standard SandC 1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsC 1141 Specification for Admixtures for ShotcreteD 1193 Specification for Reagent WaterIEEE/ASTM SI 10 Standard f
8、or Use of the InternationalSystem of Units(SI):The Modern Metric System3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology C 125.4.Summary of Test Method4.1 A mortar consisting of the sand,hydraulic cement,andwater to be tested is proportioned by
9、mass.The appropriateadmixture or admixtures are added and a specimen is preparedfrom the mortar and tested for time of setting by means ofGillmore initial and final needles.A time of setting determina-tion is then made for initial and final time of setting for eachspecimen.The time of setting shall
10、be compared to a treatedcontrol mixture to demonstrate the effect of the admixture ifsuch a comparison is the purpose of the study.5.Significance and Use5.1 The performance of an admixture for shotcrete in thefield varies with the composition of the hydraulic cement andsand combination.Since this te
11、st method involves the deter-mination of time of setting of a particular combination ofhydraulic cement,sand and an admixture,it therefore providesinformation on the suitability for use of that particular combi-nation in the field.5.2 The time of setting of the combination established in thelaborato
12、ry does not necessarily indicate the time of setting thiscombination will produce in actual shotcreting in the field.5.3 This method is used to determine the effect on time ofsetting of mortars containing admixtures as compared to acontrol mortar.5.4 The test method is used for comparison in laborat
13、orypreevaluation studies to demonstrate the effect of shotcreteadmixtures in mortar compared with plain mortar and can be1This practice is under the jurisdiction of ASTM Committee C09 on Concreteand ConcreteAggregates and is the direct responsibility of Subcommittee C09.46 onShotcrete.Current editio
14、n approved July 15,2007.Published August 2007.Originallyapproved in 1998.Last previous edition approved in 1998 as C 1398-98e1.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,ref
15、er 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 19428-2959,United States.Copyright by ASTM Intl(all rights reserved);Thu Apr 16 08:54:00
16、 EDT 2009Downloaded/printed byLaurentian University pursuant to License Agreement.No further reproductions authorized.used to demonstrate or compare the performance of shotcreteadmixtures which produce rapid setting or rapid rheologicalstiffening of shotcrete.5.5 The test method is used to evaluate the relative perfor-mance of more than one shotcrete admixture for comparison ofperformance.5.6 The test method is used to determine or verify that noadverse effects on setting time may be experienced
