ASTM_D_4259_-_18.pdf

Designation:D425918Standard Practice forPreparation of Concrete by Abrasion Prior to CoatingApplication1This standard is issued under the fixed designation D4259;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 preparation of concrete toprepare the surface prior to the application of coatings.1.2 This practice is intended to create a surface profile inconcrete and to remove foreign materials and weak surfacelaitance.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D4258 Practice for Surface Cleaning Concrete for CoatingD4285 Test Method for Indicating Oil or Water in Com-pressed AirD4538 Terminology Relating to Protective Coating andLining Work for Power Generation FacilitiesD4541 Test Method for Pull-Off Strength of Coatings UsingPortable Adhesion Testers2.2 ACI Standard:3ACI-308 Guide to Curing Concrete2.3 SSPC Standard:4SSPC-SP 13 Surface Preparation of Concrete3.Terminology3.1 Definitions:3.1.1 Definitions for use with this standard are shown inTerminology D4538 or other applicable standards.4.Summary of Practice4.1 Thispracticeisintendedtoprovideaclean,contamination-free,and roughened surface.4.2 Acceptable surfaces shall be free of laitance,formrelease agents,curing agents,oil,grease,and other penetratingcontaminants.The surface shall be free of fins,projections andloosely adhering concrete,dirt,and dust particles.4.3 For some applications,a minimum concrete surfacestrength may be required for proper coating performance.4.4 Acceptable methods of preparation include abrasiveblasting(wet or dry),mechanical abrading,water blasting,andother similar procedures that will alter the surface profile of theconcrete.5.Significance and Use5.1 This practice is used to prepare concrete for coatingswhere optimum bond is desired for service conditions such ascontinuous or intermittent immersion,temperature cycling,ormechanical loading.6.Mechanical Abrading Procedure6.1 Suitable SurfacesMechanical abrading is suitable foruse on formed surfaces and floors and for the removal of finsand projections.6.2 Pre-Surface Preparation:6.2.1 Remove grease,oil,and other penetrating contami-nants.(See Practice D4258.)6.2.2 Concrete surfaces may be wet or dry as appropriate tothe type of equipment to be used.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 Dec.15,2018.Published February 2019.Originallyapproved in 1983.Last previous edition approved in 2012 as D4259 88(2012).DOI:10.1520/D4259-18.2For 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.aci-int.org.4Available from Society for Protective Coatings(SSPC),800 Trumbull Dr.,Pittsburgh,PA 15205,http:/www.sspc.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.3 Apparatus:6.3.1 Typical apparatus covered by this method are rotaryimpact,vertical impact,and circular grinding equipment.6.3.2 Use the equipment in accordance with the manufac-turers instructions in an organized manner in order to thor-oughly cover the entire surface to be prepared.6.4 Appearance of Prepared Surface:6.4.1 The intent is to remove sufficient material in order toachieve a sound concrete surface free of laitance,glaze,efflorescence and incompatible concrete curing compounds orform release agents.6.4.2 The surface shall have a roughened,textured appear-ance.Aggregate may be exposed.Aro