1、Designation: D4258 05 (Reapproved 2012)Standard Practice forSurface Cleaning Concrete for Coating1This standard is issued under the fixed designation D4258; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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. P
3、rocedures include 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 The values stated in inch-pound units are to be regardedas stan
4、dard. No other units of measurement are included in thisstandard.1.4 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 appl
5、ica-bility of regulatory limitations prior to use. For specific hazardstatements, see Section 5.2. Referenced Documents2.1 ASTM Standards:2D4259 Practice for Abrading ConcreteD4260 Practice for Liquid and Gelled Acid Etching ofConcreteD4262 Test Method for pH of Chemically Cleaned orEtched Concrete
6、SurfacesD4263 Test Method for Indicating Moisture in Concrete bythe Plastic Sheet MethodD4285 Test Method for Indicating Oil or Water in Com-pressed Air2.2 Other Standard:ACI-308 Guide to Curing Concrete33. Summary of Practice3.1 Surface cleaning is intended to provide a clean,contamination-free sur
7、face without removing concrete fromintact, sound surfaces.3.2 Acceptable surfaces shall be free of oil, grease, looselyadhering concrete, and other contamination. Fins and projec-tions shall be corrected prior to surface cleaning.3.3 Air, water cleaning, scrubbing, sweeping, or vacuumingare acceptab
8、le cleaning methods. Cleaning agents may also beused to remove oil and grease spots followed by a fresh waterrinse.3.4 Any one 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 concret
9、e surfaces forapplying coatings intended for light-duty service.4.2 Use of this practice alone is not intended where protec-tive systems will be used for continuous or intermittentimmersion, mechanical loading, or for protective systemsneeding optimum bond for satisfactory performance (seePractices
10、D4259 and D4260).5. Hazards5.1 New concrete shall be cured according to ACI-308 andsufficient additional time allowed for drying.5.2 Moisture in the concrete may be detrimental to coatingadhesion. Moisture content shall be in compliance with coatingmanufacturers recommendation (see Test Method D4263
11、).5.3 Concrete cure compounds, form release materials, orconcrete hardeners not compatible with the coating mayrequire removal by other surface preparation methods as inPractices D4259 and D4260.6. Procedures6.1 Broom Cleaning:6.1.1 This procedure is intended to remove most surfacedust and other loo
12、sely adherent solid contaminants.6.1.2 Broom cleaning shall consist of sweeping the surfacewith a clean industrial stiff-bristled broom or similar device.Sweepings shall be removed from the immediate work area.1This practice is under the jurisdiction of ASTM Committee D33 on ProtectiveCoating and Li
13、ning Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.05 on Application and Surface Preparation.Current edition approved May 1, 2012. Published May 2012. Originallyapproved in 1983. Last previous edition approved in 2005 as D4258 05. DOI:10.1520/D4258-05R12.2F
14、or 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 Document Summary page onthe ASTM website.3Available from American Concrete Institute (ACI), P.O. Box 909
15、4, FarmingtonHills, MI 48333-9094, http:/www.concrete.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.3 Broom-cleaned surfaces require additional cleaningusing one or more of the surface preparation proceduresspecified in 6.2
16、-6.6.6.2 Vacuum Cleaning:6.2.1 This cleaning procedure is intended to remove surfacedust and other debris.6.2.2 Vacuum cleaning shall consist of vacuuming thesurface with a heavy-duty type industrial vacuum to provide anessentially dust-free surface.6.3 Air Blast Cleaning:6.3.1 This procedure is int
17、ended 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 blast cleaning shall consist of cleaning the surfacewith a compressed air stream at 80 to 100 psi through a blastingnozzle held approximat
18、ely 2 ft from the surface.6.3.3 The air stream shall be free of oil. This may be verifiedusing Test Method D4285.6.3.4 Surface cleanliness is dependent upon carrying offairborne dust before it is redeposited. Vacuum cleaning may berequired to remove redeposited dust.6.4 Water Cleaning:6.4.1 This pro
19、cedure 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 potable water having sufficient pressureto remove dust, dirt, and loose material. When necessary, handscrub with a stiff-bristled brush.6.4.
20、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 tested for moisturecontent in accordance with Test Method D4263 prior toapplying coatings.6.5 Detergent Water Cleaning:6.5.1 This proced
21、ure is intended to remove water-solublesurface contaminants and oils, grease, and other emulsifiablematerials on the surface.6.5.2 Detergent water cleaning shall consist of scraping offheavy deposits of grease or oil and cleaning the surface with astiff-bristled brush using an aqueous solution of de
22、tergent ornonsolvent emulsifier. Immediately after treatment, before thesurface dries, residues of the cleaning agent shall be removedby thoroughly flushing the surface with clean potable water.Repeat flushing until the pH of the surface water meets theacceptance criteria of Test Method D4262.6.5.3
23、Trisodium phosphate at not less than 4 oz/gal, orproprietary products intended for cleaning concrete, may beused following manufacturers instructions. The effectiveness 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 P
24、rior 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 surface may be tested for moisturecontent in accordance with Test Method D4263.6.6 Steam Cleaning:6.6.1 This cleaning procedure is similar to d
25、etergent 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 jet of high-pressure steam sufficient to remove contami-nants.6.6.3 Detergents or nonsolvent emulsifying agents intendedfor use with steam
26、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 the surface dries, the surface shall bethoroughly flushed with potable water. Repeat flushing may benecessary to remove cleaning residues.6
27、.6.5 The surfaces cleaned with detergent or nonsolventemulsifying agents shall be tested for pH in accordance withTest Method D4262 and may be tested for moisture content inaccordance with Test Method D4263 prior to applying coat-ings.6.6.6 Prior to steam cleaning, provisions shall be made forthe re
28、moval of water and contaminants generated by thiscleaning method.7. Inspection7.1 Visually examine the prepared surface for the presenceof debris, dust, dirt, oil, grease, loosely adherent concrete, andother contaminants.7.2 Test surfaces cleaned with detergent or nonsolventemulsifying agents for pH
29、 following Test Method D4262.7.3 Moisture content may be determined following TestMethod D4263.8. Acceptance8.1 Acceptable surfaces shall be free of oil, grease, looselyadhering concrete, and other contamination.9. Keywords9.1 concrete; liquid/gelled acid; surface cleaning; surfaceprofileD4258 05 (2
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33、mmittee 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D4258 05 (2012)3
