1、Designation:D 3320 00Standard Specification forEmulsified Coal-Tar Pitch(Mineral Colloid Type)1This standard is issued under the fixed designation D 3320;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A num
2、ber 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 specification covers mineral-colloid-stabilized,emulsif
3、ied coal-tar pitch suitable for use as a weather-protective and aliphatic-solvent resistant coating over bitumi-nous pavements of airports,parking areas,and driveways.1.2 The values stated in SI(metric)units are to be regardedas the standard.1.3 The following precautionary caveat pertains only to th
4、etest method portion,Section 6,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulato
5、ry limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:D 140 Practice for Sampling Bituminous Materials2D 466 Test Methods for Films Deposited from BituminousEmulsions2D 490 Specification for Road Tar3D 529 Test Method for Accelerated Weathering Test Con-ditions and Procedures for Bit
6、uminous Materials(Carbon-Arc Method)2D 2939 Test Methods for Emulsified Bitumens Used asProtective Coatings22.2Federal Specification:VV-K-211 Kerosene43.Materials and Manufacture3.1 The emulsion shall be made using tars having viscositiesof RT-11 or higher.The tars shall conform to the requirementso
7、f Specification D 490.3.2 Mineral filler(mineral colloids)shall consist of finelyground clay,silica,or other inert inorganic materials.NOTE1Caution:Bentonitic or highly expansive clays may causedrying and shrinkage problems which may affect the durability of thepavement sealer.3.3 When specified,the
8、 emulsion shall be fortified withantifreeze.4.Physical Requirements4.1 The emulsion shall be of suitable consistency for appli-cation by brush,squeegee,roller,or suitable spray equipment.The material shall be used as received.It shall not be dilutedwith water or thinned by heating.It shall bond firm
9、ly toproperly prepared damp or primed surfaces.NOTE2Pavement and ambient temperature should be not less than7C(45F)at the time of application and for at least 12 h thereafter,withno precipitation of rain,snow,etc.,until the emulsion has dried.4.2 The product shall be of smooth,uniform consistencywit
10、hout settlement or segregation in storage to the extent thatit cannot be readily dispersed by ordinary stirring.4.3 The material,after stirring to homogeneity,shall besuitable for application by the selected method in single coatsof approximately 0.3 to 0.4 L/m2(34to 1 gal/100 ft2)withoutappreciable
11、 drainage on inclines up to 0.8%(0.1 in./ft).4.4 The material shall conform to the physical propertiesprescribed in Table 1 prior to fortification with antifreeze.5.Sampling5.1 Sample in accordance with Practice D 140 and TestMethods D 2939.6.Test Methods6.1 Wet Film ContinuityUsing a spatula,spread
12、 the wetemulsion to a thin film on a sheet of standard 67.7-g/m2(18-lb)mimeograph paper.As the emulsion is drawn out to a smear,itshall show a uniformly smooth nongranular consistency,freeof coarse particles.6.2 Resistance to Freezing(when specified)Expose arepresentative specimen of the emulsion to
13、 a temperatureof 18C(0F)for 24 h;then warm the specimen to 25C(77F)in an environment not exceeding 38C(100F)and stirthoroughly.NOTE3In any test utilizing an oven,the oven to be used shall be agravity convection type.The internal dimensions of the oven shall be notless than 305 by 305 by 305 mm(12 by
14、 12 by 12 in.).1This specification is under the jurisdiction of ASTM Committee D08 onRoofing,Waterproofing,and Bituminous Materials and is the direct responsibility ofSubcommittee D08.09 on Bituminous Emulsions.Current edition approved June 10,2000.Published August 2000.Originallypublished as D 3320
15、 74 T.Last previous edition D 3320 90(1998).2Annual Book of ASTM Standards,Vol 04.04.3Annual Book of ASTM Standards,Vol 04.03.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.Philadelphia,PA 19111-5094,Attn:NPODS.1Copyright ASTM,100 Barr Harbor Drive,West Conshoho
16、cken,PA 19428-2959,United States.6.3 Density at 25C(77F)See Section 5 of Test MethodsD 2939,except express the density in kg/m3.6.4 VolatilesDetermine by the difference between residue(6.5)and 100%.6.5 ResidueTest Methods D 2939,Section 7.6.6 Resistance to VolatilizationWeigh a representativespecimen from the residue determination(6.5)and then exposeit for 30 min in a 270C(518F)oven.Weigh the specimenagain after cooling and calculate the percent weight loss.6.7 Solubility of Residue in CS2Test M