ASTM_C_1073_-_12.pdf

Designation:C107312Standard Test Method forHydraulic Activity of Slag Cement by Reaction with Alkali1This standard is issued under the fixed designation C1073;the number immediately following the designation indicates 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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the rapid determination ofhydraulic activity of slag cement.This test method measuresthe accelerated strength development of the slag cement byusing sodium hydroxide solution as mixing water and curing atelevated temperature.1.2 The values stated in SI units are to be regarded asstandard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.A specific warningstatement is given in Section 6.1.4 The text of this standard references notes and footnoteswhich provide explanatory information.These notes and foot-notes(excluding those in tables)shall not be considered asrequirements of this standard.2.Referenced Documents2.1 ASTM Standards:2C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C125 Terminology Relating to Concrete and Concrete Ag-gregatesC219 Terminology Relating to Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC778 Specification for SandC989 Specification for Slag Cement for Use in Concrete andMortars3.Terminology3.1 Definitions:3.1.1 Definitions are given in Terminology C125 and C219.3.2 Definitions of Terms Specific to This Standard:3.2.1 slag,ngranulated blast-furnace slag as defined inTerminology C125 and ground to cement fineness.4.Significance and Use4.1 This test method can be used as a quality-control test forslag production from a single source after adequate correlationwith tests stipulated in Specification C989.4.2 This test method may be used as an evaluation techniquefor slag cement,when an appropriate correlation with variousfinenesses of slag cements from a specific source ground in aspecific laboratory mill has been previously developed.4.3 The hydraulic activity as measured by this test methodon slag cement samples can provide guidance to a manufac-turer as to fineness level required to maintain a certain level ofhydraulic activity.4.4 While this test method is intended primarily as a qualitycontrol test,some studies have shown that the test method iscapable of evaluating the hydraulic activity of slag cementsfrom different sources.5.Apparatus5.1 Three-Gang Molds for 2-in.or 50-mm Cubes andCompression Test Machine,as specified in Test Method C109/C109M(Note 1).NOTE1Silicone grease is recommended for protection of moldsurfaces from the caustic solution in this test.5.2 Mixer,as specified in Method C305.5.3 Curing Chamber,capable of maintaining a temperatureof air or water bath of 55 6 2C.5.4 Containers,capable of holding one three-cube mold inan essentially vapor-tight condition.If polyethylene or otherplastic bags are used,they shall have a closure of the zip type.If rigid containers are used,they shall have tight sealing covers(Note 2).The acceptability of containers shall be determined1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.27 on Ground Slag.Current edition approved July 15,2012.Published October 2012.Originallyapproved in 1985.Last previous edition approved in 2011 as C107397a(2011).DOI:10.1520/C1073-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 by measuring the water loss after curing in air or the gain aftercuring in water bath.Water loss shall be less than 15 mL in aircuring or gain less than 5 mL in water-bath curing.NOTE2Plastic boxes designed for household storage of celery with abottom grid have given good service.6.Materials6.1 Graded Standard SandThe sand used for making testspecimens shall be natural silica sand conforming to therequirements for graded standard sand in Specification C778.6.2 Reagent Sodium Hydroxide Solution(20%):6.2.1 Prepare fresh daily using boiled distilled water andreagent grade sodium hydroxide(NaOH).6.2.2 Dissolve 200 g of sodium hydroxide in 1 L of distilledwate