ASTM D3805-1997(2003)e1 Standard Guide for Application of Aluminum-Pigmented Asphalt Roof Coatings《填充铝颜料的沥青屋顶涂料的涂覆的标准指南》.pdf

1、Designation: D 3805 97 (Reapproved 2003)e1Standard Guide forApplication of Aluminum-Pigmented Asphalt Roof Coatings1This standard is issued under the fixed designation D 3805; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea

2、r 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.e1NOTEThis guide was made SI-dominant editorially in August 2003.1. Scope1.1 This guide covers the application methods for S

3、pecifi-cation D 2824 Aluminum-Pigmented Asphalt Roof Coatings,Non-Fibered (Type I), Asbestos Fibered (Type II), and Fiberedwithout Asbestos (Type III), for application on asphalt built-uproof membranes, modified bitumen roof membranes, bitumi-nous base flashings, concrete surfaces, metal surfaces, e

4、mul-sion coatings, and solvent-based coatings. This guide does notapply to the selection of a specific aluminum-pigmentedasphalt roof coating type for use on specific projects.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly

5、.1.3 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. Specific prec

6、au-tionary statements are given in Section 4.2. Referenced Documents2.1 ASTM Standards:D 1079 Terminology Relating to Roofing, Waterproofing,and Bituminous Materials2D 2824 Specification for Aluminum-Pigmented AsphaltRoof Coatings, Nonfibered, Asbestos Fibered, and FiberedWithout Asbestos2D 4263 Tes

7、t Method for Indicating Moisture in Concrete bythe Plastic Sheet Method32.2 Other Documents:Asphalt Roofing Manufacturers Association/Roof CoatingsManufacturers Association, Guidelines for Evaluatingand Preparing Modified Bitumen Roofing for the Appli-cation of Surface Coatings43. Significance and U

8、se3.1 Asphalt-based, solvent-type, fibered or nonfibered,aluminum-pigmented roof coatings are used as a protectivecoating for solar reflection to prolong the life of roofingmaterials or where decorative qualities are desired.3.2 Suitable application of aluminum-pigmented asphaltroof coatings is an i

9、mportant factor in achieving a successfullong-term coating. Suitable application is, in part, dependentupon appropriate specifications to guide the work. This guidecan be useful in facilitating development of an appropriatespecification for surface preparation and application of the roofcoating.3.3

10、Designers/specifiers of coatings may use this guide inpreparing the application portion of their specification. Con-tractors working directly for the building owner, may also usethis guide.3.4 This guide is not all-inclusive. Manufacturers applica-tion instructions should be consulted and geographic

11、al “areapractices” considered. Consult membrane manufacturer andcoating manufacturer for acceptability of procedures andproducts.4. Storage4.1 The container should be tightly sealed to prevent solventevaporation and to keep out moisture. The coatings should notbe stored at temperatures above 50C (12

12、0F). (WarningWhen re-sealing a container, exercise caution to avoid trappingor incorporating water into the container. Water can react withaluminum pigment producing hydrogen gas, a potential explo-sion hazard.)5. Equipment for Application of Coating5.1 BrushA three-knot or four-knot roofers brush o

13、rother suitable brush.5.2 RollerA medium nap roller cover, suitable for usewith asphalt-based, solvent-type coatings.5.3 SprayEquipment capable of spraying coating in acontrolled manner to achieve desired application rate.1This guide is under the jurisdiction of ASTM Committee D08 on Roofing andWate

14、rproofing and is the direct responsibility of Subcommittee D08.05 on Solvent-Bearing Bituminous Compounds for Roofing and Waterproofing.Current edition approved Aug. 10, 2003. Published August 2003. Originallyapproved in 1979. Last previous edition approved in 1997 as D 3805 97.2Annual Book of ASTM

15、Standards, Vol 04.04.3Annual Book of ASTM Standards, Vol 06.02.4Available from Roof Coatings Manufacturers Association (RCMA), CenterPark, Suite 404, 4041 Powder Mill Road, Calverton, MD 20705.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United

16、 States.6. Mixing of Coating6.1 The aluminum pigment and filler settle out duringstorage. Thorough mixing of coating is necessary to redispersethese components prior to use. Mechanically mix the coatinguntil homogeneous. Periodic mixing of the coating duringapplication may be needed. Coating should

17、not be thinned orheated.7. Weather Considerations7.1 Coating applications should not proceed during periodsof inclement weather. Do not begin application when precipi-tation is anticipated within 24 h after application.7.2 Apply materials when ambient temperatures are 10C(50F) and warmer, but not in

18、 excess of 40C (104F).8. Surface Considerations8.1 Coatings should be applied to sound surfaces that aredry and clean to promote adhesion. Debris, dirt, grease, oil, andother materials that could impede coating adhesion shall beremoved. It is recommended that coatings be applied as soon aspractical

19、after surface preparation.8.2 Priming is not normally required and should only beused if recommended by the coating or membrane manufac-turer. Priming is not to be considered a substitute for properpreparation or cleaning of the surface.8.3 When the coatings are installed on slopes less than 1 %(18

20、in./ft), performance problems can occur. Standing watermay dull the aluminums luster and may cause adhesion failurebetween the coating and substrate.8.4 Application on steep slopes, may result in some runningof the coating. Consideration should be given to installing thedesired coating coverage in m

21、ultiple coats at lower applicationrates for the individual coats on steep-slope surfaces.8.5 When coatings are to be applied over a bituminoussurface, solvent-based coating or metal, it is recommended thatthe surface be allowed to weather prior to the application of thecoating. The extent of weather

22、ing depends on the local ambientweather conditions and the type of surface to be coated.Sufficient weathering should occur so that asphalt or coatedsurfaces achieve a relative set and are not prone to excessivesoftening or flowing. Applications to newly coated surfacesmay result in bleed-through, st

23、ress cracking, or possiblyalligatoring. The length of time necessary for a surface toweather before application of the coating shall be agreed uponby the parties involved (for example, building owner, consult-ant, contractor, manufacturer). The length of time for weath-ering shall be stated in desig

24、n specifications that reference thisapplication guide.8.6 The previous versions of this guide required that thesurface have at least the equivalent of one complete summer ofweathering. This guide, although conservative, was generallyfound to be sufficient to avoid cracks and splits in thealuminum ro

25、of coating due to substrate movement. In theabsence of any field history, this guide can be followed withreasonable assurance of success.9. Surface Preparation9.1 GeneralDebris, dust accumulations, and other loosematerials should be removed using brooms, air blowers, orvacuum equipment. Heavily soil

26、ed areas may be washed usingtrisodium phosphate with water and scrubbed with a broom orpower washed. Rinse thoroughly with plenty of fresh water toremove cleaning solutions. Allow water to evaporate prior tostart of application of coating. Remove materials that couldimpede coating adhesion.9.2 Concr

27、ete SurfacesThe concrete must be cured and dryprior to application. Test Method D 4263 is an example of atest that can be conducted to assess moisture contained in theconcrete.9.3 Metal SurfacesClean areas of rust and prime thecleaned area with a suitable primer. Exposed fasteners must besecurely ti

28、ghtened or replaced.9.4 Modified-Bitumen MembranesRefer to Asphalt Roof-ing Manufacturers Association and the Roof Coatings Manu-facturers Association, Guidelines for Evaluating and PreparingModified Bitumen Roofing for the Application of SurfaceCoatings for industry guidelines.10. Coating Applicati

29、on Methods10.1 Consult the coating manufacturer and membrane/substrate manufacturer for specific guidelines regarding appli-cation methods, equipment, rate of application, and so forth.Unless otherwise recommended by the manufacturer(s), followthese procedures:10.2 For the lower viscosity nonfibered

30、 coating (Type I), therate of application can be in the range of 0.2 to 0.4 L/m2(12 to1 gal/100 ft2).10.3 For the higher viscosity fibered coatings (Type II orType III), the rate of application for asphalt membranes can be0.4 to 1.4 L/m2(1 to 312 gal/100 ft2). The rate of applicationfor metal surfac

31、es should be 0.2 to 0.4 L/m2(12 to 1 gal/100ft2).10.4 Multiple coat applications may be used to achievemore even coverage and to improve the aesthetic appearance.The rate of application should be maintained for each indi-vidual coat in a multi-coat application. Curing time betweencoats shall be such

32、 that in-place coating is not damaged by thefoot traffic necessary to apply the next coat.10.5 For brush and roller applications, for aesthetic consid-erations only, finish strokes should be made in relatively thesame direction taking into consideration directional changesaround penetrations, protru

33、sions, and along perimeters. Whenmultiple coat applications are used, successive applications canbe applied perpendicular to the previous coat to achieve moreeven coverage and to improve aesthetic appearance.11. Curing Time and Foot Traffic11.1 Curing time is dependent on ambient weather condi-tions

34、 during the curing cycle. Under warm, sunny conditions,the coating may dry to the touch in 2 to 4 h.11.2 Avoid walking on the coating until it can take traffic sothat it is not damaged.12. Keywords12.1 aluminum-pigmented; application; coating; roofcoatingD 3805 97 (2003)e12ASTM International takes n

35、o position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own respon

36、sibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed

37、to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the ad

38、dress shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 3805 97 (2003)e13