ASTM D4260-05

Standard Practice for Liquid and Gelled Acid Etching of Concrete

SIGNIFICANCE AND USE
This practice is used to prepare concrete for coatings where optimum bond is desired for service conditions such as continuous or intermittent immersion, temperature cycling, or mechanical loading.
SCOPE
1.1 This practice covers 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 does not purport to address all of the safety concerns, if any, 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 6.

General Information

• Status: Historical
• Publication Date: 31-May-2005
• ICS: 91.080.40 - Concrete structures
• Technical Committee: D33 - Protective Coating and Lining Work for Power Generation Facilities
• Drafting Committee: D33.05 - Application and Surface Preparation

Relations

• Replaces: ASTM D4260-88(1999) - Standard Practice for Acid Etching Concrete
• Effective Date: 01-Jun-2005
• Replaced By: ASTM D4260-05(2012) - Standard Practice for Liquid and Gelled Acid Etching of Concrete
• Effective Date: 01-May-2012
• Referred By: ASTM D8104-17(2023) - Standard Guide for Determining Coating Qualification Test Data Applicability
• Effective Date: 01-Jun-2005
• Referred By: ASTM D5498-12a(2018) - Standard Guide for Developing a Training Program for Personnel Performing Coating and Lining Work Inspection for Nuclear Facilities
• Effective Date: 01-Jun-2005
• Referred By: ASTM D4258-23 - Standard Practice for Surface Cleaning Concrete for Coating
• Effective Date: 01-Jun-2005
• Referred By: ASTM D5139-19 - Standard Specification for Sample Preparation for Qualification Testing of Coatings to be Used in Nuclear Power Plants
• Effective Date: 01-Jun-2005
• Referred By: ASTM D6237-19 - Standard Guide for Painting Inspectors (Concrete and Masonry Substrates)
• Effective Date: 01-Jun-2005
• Referred By: ASTM D1734-93(2022) - Standard Practice for Making Cementitious Panels for Testing Coatings
• Effective Date: 01-Jun-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4260–05
Standard Practice for
1
Liquid and Gelled Acid Etching of Concrete
This standard is issued under the fixed designation D4260; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Summary of Practice
1.1 This practice covers surface preparation of concrete to 4.1 This practice is intended to provide a clean,
prepare the surface prior to the application of coatings. contamination-free, and roughened surface.
1.2 This practice is intended to alter the surface profile of 4.2 Acceptable surfaces shall be free of laitance, form
the concrete and to remove foreign materials and weak surface release agents, curing agents, oil, grease, and other penetrating
laitance. contaminants.The surface shall be free of fins, projections, and
1.3 This standard does not purport to address all of the loosely adhering concrete, dirt, and dust particles.
safety concerns, if any, associated with its use. It is the 4.3 For some applications, a minimum concrete surface
responsibility of the user of this standard to establish appro- strength may be required for proper coating performance.
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use. For specific hazard
statements, see Section 6. 5.1 This practice is used to prepare concrete for coatings
where optimum bond is desired for service conditions such as
2. Referenced Documents
continuous or intermittent immersion, temperature cycling, or
2
2.1 ASTM Standards: mechanical loading.
D4258 Practice for Surface Cleaning Concrete for Coating
6. Hazards
D4259 Practice for Abrading Concrete
6.1 New concrete shall be cured in accordance with ACI-
D4262 Test Method for pH of Chemically Cleaned or
Etched Concrete Surfaces 308.
6.2 Concrete cure compounds, form release materials, or
D4263 Test Method for Indicating Moisture in Concrete by
the Plastic Sheet Method concrete hardeners may require abrading, in accordance with
D4541 TestMethodforPull-OffStrengthofCoatingsUsing Practice D4259, as acid etching may not be effective.
6.3 All oil and grease shall be removed in accordance with
Portable Adhesion Testers
2.2 Other Standard: Practice D4258 prior to mechanical abrading, abrasive blast
3
cleaning, water blasting, or acid etching.
ACI-308 Recommended Practice for Curing Concrete
6.4 Use and disposal of materials should conform to estab-
3. Terminology
lished federal, state, local, and project requirements.
3.1 Definitions of Terms Specific to This Standard:
METHOD A
3.1.1 gelled acid, n—acid solution primarily intended for
use on horizontal, vertical, and overhead surfaces.
7. Liquid Acid Etching Procedure
3.1.2 liquid acid, n—acid solution primarily intended for
7.1 Pre-Surface Preparation:
use on horizontal surfaces.
7.1.1 Remove grease, oil, and other penetrating contami-
nants (see Practice D4258).
1
This practice is under the jurisdiction of ASTM Committee D33 on Protective
7.1.2 Remove fins and protruding surface irregularities by
Coating and Lining Work for Power Generation Facilities and is the direct
mechanical means.
responsibility of Subcommittee D33.05 on Application and Surface Preparation.
Current edition approved June 1, 2005. Published June 2005. Originally 7.1.3 Surfaces shall be free of standing water.
approved in 1983. Last previous edition approved in 1999 as D4260 – 88 (1999).
7.1.4 Some curing compounds may not be removed by
DOI: 10.1520/D4260-05.
liquid acid etching and will require preparation by mechanical
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
abrading, abrasive blasting, or water blasting in accordance
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
with Practice D4259.
the ASTM website.
7.1.5 When using liquid acid, proper cross ventilation and
3
AvailablefromAmericanConcreteInstitute,22400W.SevenMileRd.,Detroit,
chemical respirators shall be provided.
MI 48219.
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D4260–05
7.2 Suitable Surfaces: 8.3 Gelled Acid Etching Solutions:
7.2.1 This method is primarily suited for use on horizontal 8.3.1 Typical solutions covered by this method are muriatic
surfaces. (hydrochloric), sulfamic, phosphoric and citric acids. Hhydro-
7.2.2 Other methods of preparation may be more suitable chloric acid shall not be used where chlorides are prohibited.
for rough concret
...