Standard Practice for Abrading Concrete

SCOPE
1.1 This practice includes surface preparation of concrete to prepare the surface prior to the application of coatings.  
1.2 This practice is intended to alter the surface profile of the concrete and to remove foreign materials and weak surface laitance.  
1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 5.

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Status
Historical
Publication Date
31-Dec-1998
Current Stage
Ref Project

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ASTM D4259-88(1999) - Standard Practice for Abrading Concrete
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation: D 4259 – 88 (Reapproved 1999)
Standard Practice for
Abrading Concrete
This standard is issued under the fixed designation D 4259; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This practice includes surface preparation of concrete to 4.1 This practice is used to prepare concrete for coatings
prepare the surface prior to the application of coatings. where optimum bond is desired for service conditions such as
1.2 This practice is intended to alter the surface profile of continuous or intermittent immersion, temperature cycling, or
the concrete and to remove foreign materials and weak surface mechanical loading.
laitance.
5. Hazards
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5.1 New concrete shall be cured in accordance with ACI-
308.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Mechanical Abrading Procedure
bility of regulatory limitations prior to use. For specific hazard
6.1 Suitable Surfaces—Mechanical abrading is suitable for
statements, see Section 5.
use on formed surfaces and floors and for the removal of fins
2. Referenced Documents
and projections.
2.1 ASTM Standards: 6.2 Pre-Surface Preparation:
6.2.1 Remove grease, oil, and other penetrating contami-
D 4258 PracticeforSurfaceCleaningConcreteforCoating
D 4285 Test Method for Indicating Oil or Water in Com- nants. (See Practice D 4258.)
6.2.2 Concrete surfaces may be wet or dry as appropriate to
pressed Air
D 4541 Test Method for Pull-Off Strength of Coatings the type of equipment to be used.
6.3 Apparatus:
Using Portable Adhesion Testers
2.2 Other Standard: 6.3.1 Typical apparatus covered by this method are rotary
ACI-308 Recommended Practice for Curing Concrete impact, vertical impact, and circular grinding equipment.
6.3.2 Use the equipment in accordance with the manufac-
3. Summary of Practice
turer’s instructions in an organized manner in order to thor-
3.1 This practice is intended to provide a clean, oughly cover the entire surface to be prepared.
contamination-free, and roughened surface. 6.4 Appearance of Prepared Surface:
3.2 Acceptable surfaces shall be free of laitance, form 6.4.1 The intent is to remove sufficient material in order to
release agents, curing agents, oil, grease, and other penetrating achieve a sound concrete surface free of laitance, glaze,
contaminants. The surface shall be free of fins, projections and efflorescence and incompatible concrete curing compounds or
loosely adhering concrete, dirt, and dust particles. form release agents.
3.3 For some applications, a minimum concrete surface 6.4.2 The surface shall have a roughened, textured appear-
strength may be required for proper coating performance. ance.Aggregate may be exposed.Aroughness standard may be
3.4 Acceptable methods of preparation include abrasive established by mutual agreement.
blasting (wet or dry), mechanical abrading, water blasting, and 6.4.3 The appearance will vary depending upon the equip-
other similar procedures that will alter the surface profile of the ment used and type of concrete.
concrete. 6.5 Post-Surface Preparation Cleaning—Clean in accor-
dance with Practice D 4258 to remove loose material.
This practice is under the jurisdiction ofASTM Committee D-33 on Protective
7. Water Blast Cleaning
Coating and Lining Work for Power Generating Facilities and is the direct
7.1 Suitable Surfaces—This method is suitable for use on
responsibility of Subcommittee D33.05 on Surface Preparation.
Current edition approved April 1, 1988. Published April 1988. Originally
formed surfaces and floors.
published as D 4259 – 83. Last previous edition D 4259 – 83.
7.2 Pre-Surface Preparation:
Annual Book of ASTM Standards, Vol 06.02.
7.2.1 Remove grease, oil, and other penetrating contami-
AvailablefromAmericanConcreteInstitute,22400W.SevenMileRd.,Detroit,
nants (see Practice D 4258).
MI 48219.
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