ASTM D6948-2003 Standard Practice for Application of Refined Coal Tar (Ready to Use Commercial Grade)《精制煤焦油应用的标准实施规范(现成品、商用级)》.pdf
《ASTM D6948-2003 Standard Practice for Application of Refined Coal Tar (Ready to Use Commercial Grade)《精制煤焦油应用的标准实施规范(现成品、商用级)》.pdf》由会员分享,可在线阅读,更多相关《ASTM D6948-2003 Standard Practice for Application of Refined Coal Tar (Ready to Use Commercial Grade)《精制煤焦油应用的标准实施规范(现成品、商用级)》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 6948 03Standard Practice forApplication of Refined Coal Tar (Ready to Use, CommercialGrade)1This standard is issued under the fixed designation D 6948; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the application of emulsified re-fined coal tar slurry meeting the requirements of SpecificationD 69
3、45 Types I and II, by mechanized equipment as a weatherprotection and petroleum (aliphatic) solvent resistant sealer foruse on bituminous concrete pavements. In order to clarify thedifferences between Types I and II, see 3.3 for standarddefinition of terms.1.2 This standard does not purport to addre
4、ss 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 490 Specificat
5、ion for Road Tar2D 5727 Specification for Emulsified Refined Coal Tar (Min-eral Colloid Type)3D 6945 Specification for Emulsified Refined Coal-Tar(Ready to Use, Commercial Grade)33. Terminology3.1 Two types of mixtures are defined in SpecificationD 6945. The ingredients for both types of mixtures ar
6、e nor-mally combined at the contractors yard or at the job site.Refined coal tar emulsion meeting Specification D 5727 isconcentrated when shipped from the manufacturer to theapplicator.3.1.1 Specification D 6945 Type I materialis SpecificationD 5727 material diluted with water typically by the appl
7、icatorafter which aggregate is added.3.1.2 Specification D 6945 Type II materialis Specifica-tion D 5727 material diluted with water typically by theapplicator after which additive and aggregate is added.3.2 The mixtures described in 3.1.1 and 3.1.2 can besubmitted to a laboratory approved by the ow
8、ner for testing oftheir conformance to Specification D 6945 Type I or Type IIprior to their actual use on the job.3.3 Definitions:3.3.1 additiveone or more ingredients that can be addedto a specific refined coal tar emulsion, water, or sand (orcombination thereof) mixture to improve the coatings dur
9、a-bility, fuel resistance, drying time, color uniformity, or lengthof time required before opening the surface to traffic, orcombination thereof. This material can also be used to modifythe wet mixtures viscosity to improve aggregate suspension.Because there is such a wide variance of additives on t
10、hemarket, the aforementioned results may not take place. If anadditive is used, it is recommended that it be supplied by thesame manufacturer as the refined coal tar emulsion.3.3.2 application ratethe volume of mixed materials ap-plied per area of pavement surface, usually expressed in litersper squ
11、are meter (l/m2) (gallons per square yard (gal/yd2).3.3.3 applied mixturethe combination of all ingredientsmixed together and ready for application to the pavement. Alsoreferred to as seal coat or sealer.3.3.4 bituminous concrete pavements, newpavements thathave been placed less than 90 days.3.3.5 b
12、ituminous concrete pavements, agedpavementsthat weathered over at least one summer season and haveshown signs of one or more of the following: cracking,raveling, aggregate polishing or graying due to oxidation, orcombination thereof.3.3.6 brush applicatora hand type or mechanized brushused to apply
13、pavement sealer.3.3.7 crack fillera material that is placed in a pavementcrack or joint to fill but not necessarily seal the void created bythe crack or joint.3.3.8 crack sealanta material that has adhesive and cohe-sive properties to seal cracks, joints or other narrow openings(less than 38.5 mm (1
14、-12 in.) wide) in pavements against theentrance or passage of water or other debris.3.3.9 crude coal tarcondensed material taken from thecoking process (high temperature heating of coal under avacuum) and containing all of the volatile constituents.1This practice is under the jurisdiction of ASTM Co
15、mmittee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.09 on Bitumi-nous Emulsions.Current edition approved July 10, 2003. Published August 2003.2Annual Book of ASTM Standards, Vol 04.03.3Annual Book of ASTM Standards, Vol 04.04.1Copyright ASTM International, 10
16、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.3.10 cure, final (of the seal coat)the process of evapo-ration of water and volatiles of the applied seal coating mixtureover the period of days resulting in the coating reaching itsultimate strength. The duration of
17、 this process is dependentupon ambient conditions.3.3.11 cure, initial (of the seal coat)the condition of anapplied seal coating material that enables it to withstandvehicle traffic without damage to the seal coat.3.3.12 drying (of the seal coat)the process of evaporationof water of the applied seal
18、 coating mixture resulting in thecoating being able to sustain light foot traffic.3.3.13 mechanized application equipmentequipment usedto mix and apply the refined coal tar emulsion mixture eitherwith a spray or squeegee unit.3.3.14 primingapplication of an initial coat of a materialdesigned to assi
19、st the adhesion of the additional coats of sealcoating materials. Primers are always used as under coatingsand are not designed to be used by themselves.3.3.15 refined coal tara selectively distilled coal tarmeeting the requirements of Specification D 490, grade RT-12.3.3.16 refined coal tar emulsio
20、na stable and homoge-neous dispersion of refined coal tar, clay, mineral fillers, andspecialty chemicals in water.3.3.17 seal coatingprocess of applying a protective coat-ing to a bituminous concrete pavement.3.3.18 spray unita piece of equipment equipped with amixing tank and positive displacement
21、pump that can homo-geneously mix and apply protective coatings uniformly overthe entire width of a spray bar or wand type application device.3.3.19 squeegee unita piece of equipment equipped witha mixing tank and squeegeeing mechanism that can homoge-neously mix and apply protective coatings uniform
22、ly over theentire width of a rubber squeegee or brush type applicationdevice.3.3.20 traffcabilitythe ability of an applied seal coatingmaterial to withstand vehicle traffic without damage to the sealcoat, except for wear from traffic.3.3.21 uniform coated surfacea surface that has an evendistributio
23、n of seal coating material free of pinholes, streaks, orother uneven characteristics, or combination thereof.4. Significance and Use4.1 This practice is designed as a guide for architects,engineers, property owners or their representatives, or combi-nation thereof. Its use helps ensure the satisfact
24、ory perfor-mance of the protective coating system when applied overbituminous concrete pavements.5. Materials5.1 Refined Coal Tar Emulsion (Seal Coating) MixtureAmixture of concentrated refined coal tar emulsion water andsand, with or without an additive, as specified in SpecificationD 6945.5.2 Crac
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