ASTM D4259-1988(2006) Standard Practice for Abrading Concrete《混凝土的磨蚀》.pdf

1、Designation: D 4259 88 (Reapproved 2006)Standard Practice forAbrading Concrete1This standard is issued under the fixed designation D 4259; 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 paren

2、theses 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 preparation of concrete toprepare the surface prior to the application of coatings.1.2 This practice is intended to al

3、ter the surface profile ofthe concrete 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 and health p

4、ractices and determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements, see Section 5.2. Referenced Documents2.1 ASTM Standards:2D 4258 Practice for Surface Cleaning Concrete for CoatingD 4285 Test Method for Indicating Oil or Water in Com-pressed AirD 4541 T

5、est Method for Pull-Off Strength of CoatingsUsing Portable Adhesion Testers2.2 Other Standard:ACI-308 Recommended Practice for Curing Concrete33. Summary of Practice3.1 This practice is intended to provide a clean,contamination-free, and roughened surface.3.2 Acceptable surfaces shall be free of lai

6、tance, formrelease agents, curing agents, oil, grease, and other penetratingcontaminants. The surface shall be free of fins, projections andloosely adhering concrete, dirt, and dust particles.3.3 For some applications, a minimum concrete surfacestrength may be required for proper coating performance

7、.3.4 Acceptable methods of preparation include abrasiveblasting (wet or dry), mechanical abrading, water blasting, andother similar procedures that will alter the surface profile of theconcrete.4. Significance and Use4.1 This practice is used to prepare concrete for coatingswhere optimum bond is des

8、ired for service conditions such ascontinuous or intermittent immersion, temperature cycling, ormechanical loading.5. Hazards5.1 New concrete shall be cured in accordance with ACI-308.6. Mechanical Abrading Procedure6.1 Suitable SurfacesMechanical abrading is suitable foruse on formed surfaces and f

9、loors 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 D 4258.)6.2.2 Concrete surfaces may be wet or dry as appropriate tothe type of equipment to be used.6.3 Apparatus:6.3.1 Typical apparatus covered

10、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 t

11、o 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.Aroughness standard may beestablishe

12、d by mutual agreement.6.4.3 The appearance will vary depending upon the equip-ment used and type of concrete.6.5 Post-Surface Preparation CleaningClean in accor-dance with Practice D 4258 to remove loose material.1This practice is under the jurisdiction of ASTM Committee D33 on ProtectiveCoating and

13、 Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.05 on Application and Surface Preparation.Current edition approved Dec. 1, 2006. Published December 2006. Originallyapproved in 1983. Last previous edition approved in 1999 as D 4259 88 (1999).2For refer

14、enced 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, Farmi

15、ngtonHills, MI 48333-9094, http:/www.aci-int.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Water Blast Cleaning7.1 Suitable SurfacesThis method is suitable for use onformed surfaces and floors.7.2 Pre-Surface Preparation:7.2

16、.1 Remove grease, oil, and other penetrating contami-nants (see Practice D 4258).7.2.2 Correct fins and protruding irregularities by mechani-cal means.7.2.3 Concrete surface may be wet or dry.7.3 ApparatusTypical apparatus covered by this methodis a piston-type positive displacement pump, high-press

17、urewater blasting unit. The cleaning medium shall be potablewater.7.4 Appearance of Prepared Surface:7.4.1 The prepared surface shall be clean and free of dust,dirt, laitance and efflorescence.7.4.2 The surface shall have a roughened textured appear-ance. A roughness standard may be established by m

18、utualagreement.7.5 Post-Surface Preparation CleaningClean in accor-dance with Practice D 4258 to remove loose material.8. Abrasive Blast Cleaning Procedure8.1 Pre-Surface Preparation:8.1.1 Remove grease, oil, and other penetrating contami-nants (see Practice D 4258).8.1.2 Correct fins and protruding

19、 irregularities by mechani-cal means.8.1.3 Concrete surface may be wet or dry as appropriate tothe type of equipment to be used.8.2 Suitable SurfacesThis method is suitable for use onformed surfaces and floors.8.3 Apparatus:8.3.1 Typical methods are wet or dry open-blast cleaningwith nozzles and sel

20、f-contained recirculating blast-cleaningapparatus.8.3.2 The air stream used for nozzle blast cleaning shall befree of oil. This may be verified using Test Method D 4285.8.3.3 Use the equipment in accordance with the manufac-turers instructions.8.4 Appearance of Prepared Surface:8.4.1 The intent is t

21、o remove sufficient material in order toachieve a sound concrete surface free of laitance, glaze,efflorescence, and incompatible concrete curing compounds orform release agents.8.4.2 The surface shall have a roughened textured appear-ance. A roughness standard may be established by mutualagreement.8

22、.4.3 Some aggregate may be exposed and bug holes shallbe opened.8.5 Post-Preparation CleaningClean in accordance withPractice D 4258 to remove loose material.9. Inspection9.1 Visually examine the prepared surface for loose adher-ing concrete, thin crusts bridging voids, fins, and projections.9.2 Vis

23、ually examine the prepared surface for oil, grease,and markings.9.3 If required, surface strength may be determined inaccordance with Method D 4541 or other agreed upon method.10. Acceptance10.1 Acceptable surfaces shall be free of laitance, oil,grease, and other materials incompatible with the coat

24、ing. Thesurface shall also be free of fins, projections and looselyadhering concrete, dirt, and dust particles.10.2 The surface shall have a roughened, textured appear-ance. Aggregate may be exposed. Bug holes shall be opened.10.3 The roughened textured appearance shall be similar tothe roughness st

25、andard established by mutual agreement.10.4 If specified, the treated surface shall meet the surfacestrength requirements.11. Keywords11.1 abrading; concrete; laitance; profile; surfacepreparationASTM International takes no position respecting the validity of any patent rights asserted in connection

26、 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 responsibility.This standard is subject to revision at any time by the responsible t

27、echnical 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 to ASTM International Headquarters. Your comments will receive careful conside

28、ration 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 address shown below.This standard is copyrighted by ASTM International, 100 Barr

29、 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 4259 88 (2006)2