ASTM_D_369_-_84_2002.pdf

Designation:D 369 84(Reapproved 2002)American Association StateHighway Transportation Officials StandardAASHTO No.T74Standard Test Method forSpecific Gravity of Creosote Fractions and Residue1This standard is issued under the fixed designation D 369;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(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This test method covers a convenient and accuratemeans of determining the specific gravity of(1)creosotefractions entirely liquid at 38C,(2)creosote fractions contain-ing solids at 38C,and(3)distillation residues.It is alsosuitable for determining the specific gravity of oil-type preser-vatives when the quantity available is too small for thehydrometer method as given in Test Method D 368.TestMethods D 38 cover the sampling of wood preservatives priorto testing.1.2 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.2.Referenced Documents2.1 ASTM Standards:D 38 Test Methods for Sampling Wood Preservatives Priorto Testing2D 246 Test Method for Distillation of Creosote andCreosote-Coal Tar Solutions2D 368 Test Method for Specific Gravity of Creosote andOil-Type Preservatives2D 390 Specification for Coal-Tar Creosote for the Preserva-tive Treatment of Piles,Poles,and Timbers for Marine,Land,and Fresh Water Use2D 391 Specification for Creosote-Coal Tar Solution2E 1 Specification for ASTM Thermometers33.Summary of Test Method3.1 This is a test method for the determination of specificgravity of fractions from the distillation of creosote andcreosote-coal tar solutions as measured by means of pycnom-eter.4.Significance and Use4.1 This is a test method to determine the conformance ofspecified fractions of creosote and creosote-coal tar solutions toSpecifications D 390 and D 391.5.Apparatus5.1 Pycnometers,of the Gay-Lussac type,10-mL or 25-mLcapacity,and of the Hubbard-Carmick type,25-mL capacity.The Hubbard-Carmick type pycnometer shall be used fordetermining the specific gravity of distillation residue.5.2 Water Bath,consisting of a vessel filled with sufficientwater to permit maintaining a temperature of 38.0 6 0.1C.5.3 ThermometerAn ASTM Low Softening Point Ther-mometer having a range from 2 to+80C,and conforming tothe requirements for Thermometer 15C as prescribed in Speci-fication E 1.5.4 Balance and WeightsAn analytical balance andweights accurate to 0.5 mg.6.Calibration of Pycnometers6.1 Before calibration,grind the stopper into the neck of thepycnometer by partially filling the pycnometer with water,inserting the stopper into the neck,and rotating the stopper byhand with very light pressure.During this operation,keep theground surfaces wet and occasionally flush with water.Whenthe wet stopper can be rotated freely with no tendency for theground surfaces to stick together,using no more pressure thanthe weight of the stopper,the pycnometer is in condition forcalibration.6.2 Thoroughly clean the pycnometer with hot chromic acidcleaning solution.Empty the acid from the pycnometer,flushthoroughly with distilled water,dry in an oven at about 110C,cool in a desiccator for 15 to 30 min,and weigh to the nearest0.001 g.Designate this weight P.1This test method is under the jurisdiction of ASTM Committee D07 on Woodand is the direct responsibility of Subcommittee D07.06 on Treatments for WoodProducts.Current edition approved Dec.28,1984.Published February 1985.Originallypublished as D 369 30 T.Last previous edition D 369 67(1979).This method is identical in substance with the Standard Method for theDetermination of the Specific Gravity of Distillation Fractions which is part of theAmerican Wood-PreserversAssociation Standard Methods forAnalysis of Creosoteand Oil-Type Preservatives(A1).Acknowledgement is made to the AmericanWood-Preservers Association for its development of the subject matter covered inthis standard.2Annual Book of ASTM Standards,Vol 04.10.3Annual Book of ASTM Standards,Vol 14.03.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.6.3 Fill the pycnometer with freshly boiled distilled water atroom temperature.(A pipet or drawn-out medicine dropperfacilitates this operation.)Insert the stopper with a rotarymotion to secure a firm seat,making sure that no air isentrapped,then completely immerse the pycnometer in thewater bath at 38.0C for 30 min.6.4 While still in the water bath,raise the pycnometer sothat the top of the stopper is slightly over the water level in thebath and wipe off the water on the