ASTM D4260-23
(Practice)Standard Practice for Liquid and Gelled Acid Etching of Concrete
Standard Practice for Liquid and Gelled Acid Etching of Concrete
SIGNIFICANCE AND USE
5.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 6.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4260 − 23
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 3. Terminology
1.1 This practice covers surface preparation of concrete to 3.1 Definitions of Terms Specific to This Standard:
prepare the surface prior to the application of coatings. 3.1.1 gelled acid, n—acid solution primarily intended for
use on horizontal, vertical, and overhead surfaces.
1.2 This practice is intended to alter the surface profile of
3.1.2 liquid acid, n—acid solution primarily intended for
the concrete and to remove foreign materials and weak surface
use on horizontal surfaces.
laitance.
1.3 This standard does not purport to address all of the
4. Summary of Practice
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4.1 This practice is intended to provide a clean,
priate safety, health, and environmental practices and deter- contamination-free, and roughened surface.
mine the applicability of regulatory limitations prior to use.
4.2 Acceptable surfaces shall be free of laitance, form
For specific hazard statements, see Section 6.
release agents, curing agents, oil, grease, and other penetrating
1.4 This international standard was developed in accor-
contaminants. The surface shall be free of fins, projections, and
dance with internationally recognized principles on standard-
loosely adhering concrete, dirt, and dust particles.
ization established in the Decision on Principles for the
4.3 For some applications, a minimum concrete surface
Development of International Standards, Guides and Recom-
strength may be required for proper coating performance.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5. Significance and Use
2. Referenced Documents
5.1 This practice is used to prepare concrete for coatings
2
where optimum bond is desired for service conditions such as
2.1 ASTM Standards:
continuous or intermittent immersion, temperature cycling, or
D4258 Practice for Surface Cleaning Concrete for Coating
mechanical loading.
D4259 Practice for Preparation of Concrete by Abrasion
Prior to Coating Application
6. Hazards
D4262 Test Method for pH of Chemically Cleaned or Etched
Concrete Surfaces
6.1 Use and disposal of materials should conform to estab-
D4263 Test Method for Indicating Moisture in Concrete by
lished federal, state, local, and project requirements.
the Plastic Sheet Method
METHOD A
D4541 Test Method for Pull-Off Strength of Coatings Using
Portable Adhesion Testers
7. Liquid Acid Etching Procedure
2.2 Other Standard:
3
ACI-308 Guide to Curing Concrete
7.1 Pre-Surface Preparation:
7.1.1 New concrete shall be cured in accordance with
ACI-308.
1
This practice is under the jurisdiction of ASTM Committee D33 on Protective
7.1.2 Remove grease, oil, and other penetrating contami-
Coating and Lining Work for Power Generation Facilities and is the direct
responsibility of Subcommittee D33.05 on Application and Surface Preparation.
nants (see Practice D4258).
Current edition approved April 1, 2023. Published April 2023. Originally
7.1.3 Remove fins and protruding surface irregularities by
approved in 1983. Last previous edition approved in 2017 as D4260 – 05 (2017).
mechanical means.
DOI: 10.1520/D4260-23.
2
7.1.4 Surfaces shall be free of standing water.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1.5 Some curing compounds may not be removed by
Standards volume information, refer to the standard’s Document Summary page on
liquid acid etching and will require preparation by mechanical
the ASTM website.
3
abrading, abrasive blasting, or water blasting in accordance
Available from American Concrete Institute (ACI), P.O. Box 9094, Farmington
Hills, MI 48333-9094, http://www.concrete.org. with Practice D4259.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D4260 − 23
7.1.6 When using liquid acid, proper cross ventilation and 8.2 Suitable Surfaces:
chemical respirators shall be provided. 8.2.1 This method is suited for use on horizontal, vertical,
and overhead surfaces.
7.2 Suitable Surfac
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4260 − 05 (Reapproved 2017) D4260 − 23
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
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. For specific hazard statements, see Section 6.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D4258 Practice for Surface Cleaning Concrete for Coating
D4259 Practice for Preparation of Concrete by Abrasion Prior to Coating Application
D4262 Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces
D4263 Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method
D4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
2.2 Other Standard:
3
ACI-308 Guide to Curing Concrete
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 gelled acid, n—acid solution primarily intended for use on horizontal, vertical, and overhead surfaces.
3.1.2 liquid acid, n—acid solution primarily intended for use on horizontal surfaces.
4. Summary of Practice
4.1 This practice is intended to provide a clean, contamination-free, and roughened surface.
1
This practice is under the jurisdiction of ASTM Committee D33 on Protective Coating and Lining Work for Power Generation Facilities and is the direct responsibility
of Subcommittee D33.05 on Application and Surface Preparation.
Current edition approved Sept. 1, 2017April 1, 2023. Published September 2017April 2023. Originally approved in 1983. Last previous edition approved in 20122017 as
D4260 – 05 (2012).(2017). DOI: 10.1520/D4260-05R17.10.1520/D4260-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Concrete Institute (ACI), P.O. Box 9094, Farmington Hills, MI 48333-9094, http://www.concrete.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4260 − 23
4.2 Acceptable surfaces shall be free of laitance, form release agents, curing agents, oil, grease, and other penetrating
contaminants. The surface shall be free of fins, projections, and loosely adhering concrete, dirt, and dust particles.
4.3 For some applications, a minimum concrete surface strength may be required for proper coating performance.
5. Significance and Use
5.1 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.
6. Hazards
6.1 New concrete shall be cured in accordance with ACI-308.
6.2 Concrete cure compounds, form release materials, or concrete hardeners may require abrading, in accordance with Practice
D4259, as acid etching may not be effective.
6.3 All oil and grease shall be removed in accordance with Practice D4258 prior to mechanical abrading, abrasive blast cleaning,
water blasting, or acid etching.
6.1 Use and disposal of materials should conform to established federal, state, local, and project requirements.
METHOD A
7. Liquid Acid Etching Procedure
7.1 Pre-Surface Preparation:
7.1.1 New concrete shall be cured in accordance with ACI-308.
7.1.2 Remove grease, oil, and other pene
...
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