ASTM_D_4258_-_05_2012.pdf

Designation:D425805(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.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.Procedures 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 standard.No other units of measurement are included in thisstandard.1.4This 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.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 or EtchedConcrete 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 surface 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 acceptable 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 concrete 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 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).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 loosely 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 Lining 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/D4258-05R12.2For 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 Document Summary page onthe ASTM website.3Available from American Concrete Institute(ACI),P.O.Box 9094,FarmingtonHills,MI 48333-9094,http:/www.concrete.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 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 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 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 blast cleaning shall consist of cleaning the surfacewith a compressed air stream at 80 to 100 psi through a bl