1、Designation: D3320/D3320M 18Standard Specification forEmulsified Coal-Tar Pitch (Mineral Colloid Type)1This standard is issued under the fixed designation D3320/D3320M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers mineral-
3、colloid-stabilized,emulsified 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 either SI units or inch-pound unitsare to be regarded separately as standard. Th
4、e values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 The following precautionary caveat pertains only to thetest method portion, Section 6, o
5、f 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, health, andenvironmental practices and determine the applicability ofregulatory limitations
6、 prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization Techni
7、calBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D140/D140M Practice for Sampling Asphalt MaterialsD490 Specification for Road TarD529 Practice for Enclosed Carbon-Arc Exposures of Bitu-minous Materials (Withdrawn 2013)3D2939 Test Methods for Emulsified Bitumens Used a
8、sProtective Coatings (Withdrawn 2012)3D3699 Specification for Kerosine2.2 Federal Specification:4VV-K-211 Kerosene3. Materials and Manufacture3.1 The emulsion shall be made using tars having viscositiesof RT-11 or higher. The tars shall conform to the requirementsof Specification D490.3.2 Mineral fi
9、ller (mineral colloids) shall consist of finelyground clay, silica, or other inert inorganic materials.(WarningBentonitic or highly expansive clays may causedrying and shrinkage problems, which may affect the durabilityof the pavement sealer.)3.3 When specified, the emulsion shall be fortified witha
10、ntifreeze.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 firmly toproperly prepared damp
11、or primed surfaces.NOTE 1Pavement 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, and so forth, until the emulsion has dried.4.2 The product shall be of smooth, uniform consistencywithout settlemen
12、t 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/m234 to 1 gal/100 ft2 withoutappreciable drainage on
13、 inclines up to 0.8 % 0.1 in./ft.1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.09on Bituminous Emulsions.Current edition approved Oct. 1, 2018. Published November 2018. Originallyapproved in 1974.
14、Last previous edition approved in 2004 as D3320 00 (2004)1,which was withdrawn in July 2013 and reinstated in October 2018. DOI:10.1520/D3320_D3320M-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMSta
15、ndards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Obsolete. Previously available from Standardization Documents Order Desk,Bldg. 4 Section D, 700 Robbins Ave. Philadelphia, P
16、A 19111-5094, Attn: NPODS.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles f
17、or theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.4 The material shall conform to the physical propertiesprescribed in Table 1 prior to fortification with antifreeze.5. Sampling5.1 Sample in
18、accordance with Practice D140/D140M andTest Methods D2939.6. Test Methods6.1 Wet Film ContinuityUsing a spatula, spread the wetemulsion to a thin film on a sheet of standard 67.7-g/m218-lbmimeograph paper. As the emulsion is drawn out to a smear, itshall show a uniformly smooth nongranular consisten
19、cy, freeof coarse particles.6.2 Resistance to Freezing (when specified)Expose a rep-resentative specimen of the emulsion to a temperatureof 18C 0F for 24 h; then warm the specimen to 25C77F in an environment not exceeding 38C 100F and stirthoroughly.NOTE 2In any test utilizing an oven, the oven to b
20、e used shall be agravity convection type. The internal dimensions of the oven shall be notless than 305 by 305 by 305 mm 12 by 12 by 12 in.6.3 Density at 25C 77FSee Section 7 on Weight perGallon in Test Methods D2939, except express the density inkg/m3.6.4 VolatilesDetermine by the difference betwee
21、n residue(6.5) and 100 %.6.5 ResidueTest Methods D2939, Section 8 on Residue byEvaporation.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 per
22、cent weight loss.6.7 Solubility of Residue in CS2Test Methods D2939,Section 24 on Solubility of Residue in Carbon Disulfide.6.8 Ash of ResidueTest Methods D2939, Section 10 onAsh Content.6.9 FlammabilityTest Methods D2939, Section 12 onFlash Point.6.10 Drying TimeTest Methods D2939, Section 13 onDry
23、ing Time, except test after drying for 8 h.6.11 Resistance to HeatTest Methods D2939, Section 14on Resistance to Heat, 80 6 3C 176 6 5F for 2 h.6.12 Resistance to KerosineTest Methods D2939, exceptapply the emulsion in two coats and use kerosine in testingapplied film.6.12.1 Apply the material in tw
24、o coats using a brass mask1.6 mm 464 in. in thickness for the first coat and a 3.2-mm864-in. brass mask with the same rectangular opening as thefirst mask for the second coat, so that the cured film has aminimum thickness of 1.6 mm 0.06 in. Leave the mask forthe first coat in place during the drying
25、 period and remove itbefore the second mask is positioned for the final coatingapplication.6.12.2 Cure each coat for 96 h in agitated air at 25 6 1C77 6 2F and 50 6 10 % relative humidity.6.12.3 After completion of curing, fill the metal ring,pressed into, but not through, the coating, with kerosine
26、 (seeSection 25 on Resistance to Kerosine in Test Methods D2939).The kerosine shall be in accordance with Specification D3699.Expose the coating to kerosine for 24 h before evaluation.Remove the kerosine from the metal ring before examining thefilm for adhesion.6.13 Resistance to WaterTest the cured
27、 coating film,prepared as in 6.12, in accordance with 15.2 of Test MethodsD2939, but using distilled water.6.14 Resistance to Impact:6.14.1 Prepare the specimens used in this test by coatingmetal plates 75 by 225 by 3 mm 3 by 9 by18 in. in size.Degrease the metal with a suitable solvent, such as tri
28、chloro-ethylene; then polish with steel wool. Protect the reverse sideof the panel against corrosion.6.14.2 Apply the emulsion with a doctor blade set at athickness of 1.6 mm 464 in. to the prepared surface and allowto dry as described in 6.12.2.6.14.3 Then place each specimen, coating uppermost, on
29、 asolid horizontal base, and subject it to the impact of a 0.9-kg2-lb steel ball dropped from a height of 2.4 m 8 ft. ConductTABLE 1 Physical Properties of Emulsified Coal-Tar Pitch (Mineral Colloid Type)PropertyCharacteristicsMin MaxWet film continuityResistance to freezing (when specified)Smooth,
30、nongranular film.Shall return to a homogeneous consistency when stirred.Density at 25C 77F, kg/m31150 .Volatiles, % . 63Residue by evaporation, % 37 .Resistance to volatilization, residue weight loss, % . 15Solubility of residue in CS2,% 25 .Ash content of residue, % 30 40Flammability Shall show no
31、tendency to flash or ignite.Drying time, firm set, h . 8Resistance to heat No blistering, sagging, or slipping.Resistance to kerosine No loss of adhesion. No softening of the film.Resistance to water No loss of adhesion.Resistance to impact before and after accelerated weathering No chipping, flakin
32、g, cracking, or loss of adhesion extending morethan 6.4 mm 14 in. beyond periphery of impact.D3320/D3320M 182the test at 25 6 1C 77 6 2F. Examine the coatingimmediately for evidence of chipping, cracking, or loss ofadhesion to the metal.6.15 Resistance to Impact after Accelerated Weathering:6.15.1 P
33、repare the specimens used in this test in accordancewith 6.14; then subject them to 25 cycles of cycle B asdescribed in Test Method D529.6.15.2 At the completion of the accelerated weatheringperiod, subject each specimen to the impact test as described in6.14.3.NOTE 3Instead of testing after acceler
34、ated weathering, the suppliermay furnish a certification showing three years satisfactory field perfor-mance.7. Retest and Rejection7.1 If the results of any test do not conform to the require-ments of this specification, retesting to determine conformitymay be performed as agreed upon between the p
35、urchaser andthe seller.8. Inspection8.1 Inspection of material shall be made as agreed uponbetween the purchaser and the seller as part of the purchasecontract.9. Certification9.1 Upon request of the purchaser in the contract or order, amanufacturers certification that the material was manufactureda
36、nd tested in accordance with this specification together with areport of the test results shall be furnished at the time ofshipment.10. Packaging and Marking10.1 Emulsion shall be packaged to permit acceptance bycarrier for transportation and to afford adequate protectionfrom normal hazards of handl
37、ing and shipping.10.2 Each package shall be plainly marked with the nameand brand of the manufacturer or distributor as well as the typeor grade of the product. Each package should also contain themanufacturers production code or lot number.11. Keywords11.1 coal tar pitch; emulsified; mineral colloi
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