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ASTM D4260-05(2012)

(Practice)

Standard Practice for Liquid and Gelled Acid Etching of Concrete

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
30-Apr-2012
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
Current Stage
Ref Project

Relations

Replaces
ASTM D4260-05 - Standard Practice for Liquid and Gelled Acid Etching of Concrete
Effective Date
01-May-2012
Referred By
ASTM D6237-19 - Standard Guide for Painting Inspectors (Concrete and Masonry Substrates)
Effective Date
01-May-2012
Referred By
ASTM D4258-23 - Standard Practice for Surface Cleaning Concrete for Coating
Effective Date
01-May-2012
Referred By
ASTM D8104-17(2023) - Standard Guide for Determining Coating Qualification Test Data Applicability
Effective Date
01-May-2012
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-May-2012
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-May-2012
Referred By
ASTM D1734-93(2022) - Standard Practice for Making Cementitious Panels for Testing Coatings
Effective Date
01-May-2012

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ASTM D4260-05(2012) - Standard Practice for Liquid and Gelled Acid Etching of ConcreteASTM D4260-05(2012) - Standard Practice for Liquid and Gelled Acid Etching of Concrete
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ASTM D4260-05(2012) - Standard Practice for Liquid and Gelled Acid Etching of 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: D4260 − 05 (Reapproved 2012)
Standard Practice for
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
loosely adhering concrete, dirt, and dust particles.
1.3 This standard does not purport to address all of the
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-
bility of regulatory limitations prior to use. For specific hazard
5. Significance and Use
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
2.1 ASTM Standards:
mechanical loading.
D4258 Practice for Surface Cleaning Concrete for Coating
D4259 Practice for Abrading Concrete
6. Hazards
D4262 TestMethodforpHofChemicallyCleanedorEtched
Concrete Surfaces 6.1 New concrete shall be cured in accordance with ACI-
308.
D4263 Test Method for Indicating Moisture in Concrete by
the Plastic Sheet Method
6.2 Concrete cure compounds, form release materials, or
D4541 Test Method for Pull-Off Strength of Coatings Using
concrete hardeners may require abrading, in accordance with
Portable Adhesion Testers
Practice D4259, as acid etching may not be effective.
2.2 Other Standard:
3 6.3 All oil and grease shall be removed in accordance with
ACI-308 Guide to Curing Concrete
Practice D4258 prior to mechanical abrading, abrasive blast
cleaning, water blasting, or acid etching.
3. Terminology
3.1 Definitions of Terms Specific to This Standard: 6.4 Use and disposal of materials should conform to estab-
3.1.1 gelled acid, n—acid solution primarily intended for lished federal, state, local, and project requirements.
use on horizontal, vertical, and overhead surfaces.
METHOD A
3.1.2 liquid acid, n—acid solution primarily intended for
use on horizontal surfaces.
7. Liquid Acid Etching Procedure
7.1 Pre-Surface Preparation:
This practice is under the jurisdiction of ASTM Committee D33 on Protective
7.1.1 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 May 1, 2012. Published May 2012. Originally
7.1.2 Remove fins and protruding surface irregularities by
approved in 1983. Last previous edition approved in 2005 as D4260 – 05. DOI:
mechanical means.
10.1520/D4260-05R12.
7.1.3 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
7.1.4 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.
abrading, abrasive blasting, or water blasting in accordance
Available fromAmerican 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
D4260 − 05 (2012)
7.1.5 When using liquid acid, proper cross ventilation and 8.2.1 This method is suited for use on horizontal, vertical,
chemical respirators shall be provided. and overhead surfaces.
8.2.2 Other means of preparation may be more suitable for
7.2 Suitable Surfaces:
rough concrete surfaces.
7.2.1 This method is primarily suited for use on horizontal
8.3 Gelled Acid Etching Solutions:
surfaces.
7.2.2 Other methods of preparation may be more suitable 8.3.1 Typical solutions covered by this method are muriatic
(hydrochloric), sulfamic, phosphoric and citric acids. Hhydro-
for rough concrete surfaces and walls or overhead surfaces.
chloric acid shall not be used where chlorides are prohibited.
7.3 Liquid Acid Etching Solutions:
8.3.2 The gelled acid concentrations of etching solutions
7.3.1 Typical solutions covered by this method are muriatic
may vary depending on the concrete texture and the degree of
(hydrochloric), sulfamic, phosphoric and citric acids. Hydro-
etching required.
chloric acid shall not be used where chlorides are prohibited.
8.3.3 The concrete surface can be pre-wetted with water
7.3.2 The liquid acid concentrations of etching solutions
prior to applying etching solutions. Free-standing water shall
may vary, depending on the concrete texture and degree of
be removed. Uniformly apply the etching solution to the wet
etching required.
surface using an acid resistant sprayer, non-metallic scrub
7.3.3 The concrete surface shall
...

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