ASTM D4258-2005 Standard Practice for Surface Cleaning Concrete for Coating《覆层用表面清洁混凝土的标准规程》.pdf

1、Designation: D 4258 05Standard Practice forSurface Cleaning Concrete for Coating1This standard is issued under the fixed designation D 4258; 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 par

2、entheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice includes surface cleaning of concrete toremove grease, dirt, and loose material prior to the applicationof coatings. Procedures inclu

3、de broom cleaning, vacuumcleaning, air blast cleaning, water cleaning, detergent watercleaning, and steam cleaning.1.2 This practice is not intended to alter the surface profileof the concrete but to clean the surface.1.3 This standard does not purport to address all of thesafety concerns, if any, a

4、ssociated 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. For specific hazardstatements, see Section 5.2. Referenced Documents2.1 ASTM Standards:2D 4259 P

5、ractice for Abrading ConcreteD 4260 Practice for Liquid and Gelled Acid Etching ofConcreteD 4262 Test Method for pH of Chemically Cleaned orEtched Concrete SurfacesD 4263 Test Method for Indicating Moisture in Concrete bythe Plastic Sheet MethodD 4285 Test Method for Indicating Oil or Water in Com-p

6、ressed Air2.2 Other Standard:ACI-308 Recommended Practice for Curing Concrete33. Summary of Practice3.1 Surface cleaning is intended to provide a clean,contamination-free surface without removing concrete fromintact, sound surfaces.3.2 Acceptable surfaces shall be free of oil, grease, looselyadherin

7、g concrete, and other contamination. Fins and projec-tions shall be corrected prior to surface cleaning.3.3 Air, water cleaning, scrubbing, sweeping, or vacuumingare acceptable cleaning methods. Cleaning agents may also beused to remove oil and grease spots followed by a fresh waterrinse.3.4 Any one

8、 or a combination of the listed cleaning proce-dures may be used to achieve acceptably cleaned surfaces.4. Significance and Use4.1 Surface cleaning is used to prepare concrete surfaces forapplying coatings intended for light-duty service.4.2 Use of this practice alone is not intended where protec-ti

9、ve systems will be used for continuous or intermittentimmersion, mechanical loading, or for protective systemsneeding optimum bond for satisfactory performance (seePractices D 4259 and D 4260).5. Hazards5.1 New concrete shall be cured according to ACI-308 andsufficient additional time allowed for dr

10、ying.5.2 Moisture in the concrete may be detrimental to coatingadhesion. Moisture content shall be in compliance with coatingmanufacturers recommendation (see Test Method D 4263).5.3 Concrete cure compounds, form release materials, orconcrete hardeners not compatible with the coating mayrequire remo

11、val by other surface preparation methods as inPractices D 4259 and D 4260.6. Procedures6.1 Broom Cleaning:6.1.1 This procedure is intended to remove most surfacedust and other loosely adherent solid contaminants.6.1.2 Broom cleaning shall consist of sweeping the surfacewith a clean industrial stiff-

12、bristled broom or similar device.Sweepings shall be removed from the immediate work area.6.1.3 Broom-cleaned surfaces require additional cleaningusing one or more of the surface preparation proceduresspecified in 6.2-6.6.6.2 Vacuum Cleaning:6.2.1 This cleaning procedure is intended to remove surface

13、dust and other debris.1This practice is under the jurisdiction of ASTM Committee D33 on ProtectiveCoating and Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.05 on Application and Surface Preparation.Current edition approved Sept. 1, 2005. Published Se

14、ptember 2005. Originallyapproved in 1983. Last previous edition approved in 1999 as D 4258 83 (1999).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards D

15、ocument Summary page onthe ASTM website.3Available fromAmerican Concrete Institute, 22400 W. Seven Mile Rd., Detroit,MI 48219.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.2.2 Vacuum cleaning shall consist of vacuuming thesurface

16、 with a heavy-duty type industrial vacuum to provide anessentially dust-free surface.6.3 Air Blast Cleaning:6.3.1 This procedure is intended to remove debris, dust, dirt,loosely adherent laitance, and concrete from walls and ceilingsand to provide an essentially sound dust-free surface.6.3.2 Air bla

17、st cleaning shall consist of cleaning the surfacewith a compressed air stream at 80 to 100 psi through a blastingnozzle held approximately 2 ft from the surface.6.3.3 The air stream shall be free of oil. This may be verifiedusing Test Method D 4285.6.3.4 Surface cleanliness is dependent upon carryin

18、g offairborne dust before it is redeposited. Vacuum cleaning may berequired to remove redeposited dust.6.4 Water Cleaning:6.4.1 This procedure is intended to remove dust, dirt, andwater-soluble surface contaminants.6.4.2 Water cleaning shall consist of cleaning the surfacewith a stream of clean pota

19、ble water having sufficient pressureto remove dust, dirt, and loose material. When necessary, handscrub with a stiff-bristled brush.6.4.3 Prior to water cleaning, provisions shall be made forthe removal of wash water and contaminants generated by thiscleaning method.6.4.4 The cleaned surface may be

20、tested for moisturecontent in accordance with Test Method D 4263 prior toapplying coatings.6.5 Detergent Water Cleaning:6.5.1 This procedure is intended to remove water-solublesurface contaminants and oils, grease, and other emulsifiablematerials on the surface.6.5.2 Detergent water cleaning shall c

21、onsist of scraping offheavy deposits of grease or oil and cleaning the surface with astiff-bristled brush using an aqueous solution of detergent ornonsolvent emulsifier. Immediately after treatment, before thesurface dries, residues of the cleaning agent shall be removedby thoroughly flushing the su

22、rface with clean potable water.Repeat flushing until the pH of the surface water meets theacceptance criteria of Test Method D 4262.6.5.3 Trisodium phosphate at not less than 4 oz/gal, orproprietary products intended for cleaning concrete, may beused following manufacturers instructions. The effecti

23、veness oftrisodium phosphate may be improved with the use of hotwater.6.5.4 Repeat 6.5.2 until water does not bead on the surfaces.6.5.5 Prior to detergent water washing, provisions shall bemade for the removal of wash water and contaminants gener-ated by this cleaning method.6.5.6 The cleaned surfa

24、ce may be tested for moisturecontent in accordance with Test Method D 4263.6.6 Steam Cleaning:6.6.1 This cleaning procedure is similar to detergent waterwashing, but is more effective for the removal of heavydeposits of grease and oil.6.6.2 Steam cleaning shall consist of cleaning the surfacewith a

25、jet of high-pressure steam sufficient to remove contami-nants.6.6.3 Detergents or nonsolvent emulsifying agents intendedfor use with steam cleaning equipment may be added whererequired for removal of oil and grease.6.6.4 When detergents or other emulsifying agents are used,after cleaning and before

26、the surface dries, the surface shall bethoroughly flushed with potable water. Repeat flushing may benecessary to remove cleaning residues.6.6.5 The surfaces cleaned with detergent or nonsolventemulsifying agents shall be tested for pH in accordance withTest Method D 4262 and may be tested for moistu

27、re content inaccordance with Test Method D 4263 prior to applying coat-ings.6.6.6 Prior to steam cleaning, provisions shall be made forthe removal of water and contaminants generated by thiscleaning method.7. Inspection7.1 Visually examine the prepared surface for the presenceof debris, dust, dirt,

28、oil, grease, loosely adherent concrete, andother contaminants.7.2 Test surfaces cleaned with detergent or nonsolventemulsifying agents for pH following Test Method D 4262.7.3 Moisture content may be determined following TestMethod D 4263.8. Acceptance8.1 Acceptable surfaces shall be free of oil, gre

29、ase, looselyadhering concrete, and other contamination.9. Keywords9.1 concrete; liquid/gelled acid; surface cleaning; surfaceprofileASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard

30、 are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif n

31、ot revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which

32、 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 address 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).D4258052