ASTM_C_1580_-_15.pdf

Designation:C158015Standard Test Method forWater-Soluble Sulfate in Soil1This standard is issued under the fixed designation C1580;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.Scope*1.1 This test method is for the determination of water-soluble sulfate in soils.1.2 This test method was developed for concentrations ofwater-soluble sulfate in soils between 0.02 and 3.33%sulfateby mass.1.3 This test method does not determine sulfur in any formexcept as sulfate.1.4 Some governing bodies regulate the movement of soilsfrom one area to another.It is up to the sampler and laboratoryto comply with all regulations.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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 to determine theapplicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C125 Terminology Relating to Concrete and Concrete Ag-gregatesC114 Test Methods for Chemical Analysis of HydraulicCementD1193 Specification for Reagent WaterE60 Practice for Analysis of Metals,Ores,and RelatedMaterials by SpectrophotometryE275 Practice for Describing and Measuring Performance ofUltraviolet and Visible Spectrophotometers3.Terminology3.1 For definitions of terms used in this test method,refer toTerminology C125.4.Significance and Use4.1 This test method can be used to determine if soils couldhave an adverse reaction with hydraulic cement concrete.5.Apparatus5.1 PhotometerOne of the following,given in order ofpreference:5.1.1 Nephelometer or turbidimeter,5.1.2 Spectrophotometer for use at 420 nm with light path of4 to 5 cm,and5.1.3 Filter photometer with a violet filter having a maxi-mum near 420 nm and a light path of 4 to 5 cm.Filterphotometers and photometric practices prescribed in this testmethod shall conform to Practice E60;spectrophotometerpractices shall conform to Practice E275.5.2 Stopwatch,readable to 0.1 minutes.5.3 Measuring Spoon,capacity 0.2 to 0.3 mL.5.4 Drying oven,capable of continuously heating at 110 65 C.5.5 Balance,shall be capable of reproducing results within0.0002 g with an accuracy of 60.0002 g.Direct-readingbalances shall have a sensitivity not exceeding 0.0001 g.Conventional two-pan balances shall have a maximum sensi-bility reciprocal of 0.0003 g.Any rapid weighing device thatmay be provided,such as a chain,damped motion,or heavyriders,shall not increase the basic inaccuracy by more than0.0001 g at any reading and with any load within the ratedcapacity of the balance.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.69 on Miscellaneous Tests.Current edition approved Oct.1,2015.Published December 2015.Originallyapproved in 2005.Last previous edition approved in 2010 as C1580 091.DOI:10.1520/C1580-15.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.6 Stirrer,magneticvariablespeed,withaTFE-fluorocarbon coated magnetic stirring rod or an overhead stirrerwith a propeller.6.Reagents and Materials6.1 Purity of ReagentsAll reagents shall conform to thespecifications of the Committee on Analytical Reagents of theAmerican Chemical Society.36.2 Purity of WaterUnless otherwise indicated,referenceto water shall be understood to mean reagent water conformingto Specification D1193,Type I.Other reagent water types(SeeNote 1)may be used,provided it is first ascertained that thewater is of sufficiently high purity to permit its use withoutadversely affecting the precision and bias of the test method.NOTE1Type II water was specified at the time of round robin testingof this test method.6.3 BariumChlorideCrystalsofbariumchloride(BaCl22H2O)screened to 850 to 600 m.To prepare in thelaboratory,spread crystals over a large watch glass,desiccatefor 24 h,screen to remove any crystals that are not 850 to 600m,and store in a clean,dry jar.6.4 Conditioning ReagentPlace 30 mL of concentratedhydrochloric acid(HCl,sp gr 1.19),300 mL reagent water,100mL 95%ethanol or isopropanol and 75 g sodium chloride(NaCl)in a container.Add 50 mL glycerol and mix.6.5 Sulfate Solution,Standard(1 mL=0.100 mg SO4)Dissolve 0.1479 g of anhydrous sodium sulfate(Na2SO4)inwater