ASTM D4262-05(2018)
(Test Method)Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces
Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces
SIGNIFICANCE AND USE
3.1 Chemical cleaning and etching is used to prepare concrete for coating.
3.2 Residual chemicals not removed by water rinsing may adversely affect the performance and adhesion of coatings applied over prepared concrete surfaces. It is the intent of this test method to determine that residual chemicals have been removed by measuring the acidity or alkalinity of the final rinsed surface.
SCOPE
1.1 This test method covers procedures for determining the acidity or alkalinity of concrete surfaces prepared by chemical cleaning or etching prior to coating.
1.2 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.
1.3 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.
General Information
- Status
- Published
- Publication Date
- 31-Jul-2018
- Technical Committee
- D33 - Protective Coating and Lining Work for Power Generation Facilities
- Drafting Committee
- D33.05 - Application and Surface Preparation
Relations
- Replaces
ASTM D4262-05(2012) - Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces - Effective Date
- 01-Aug-2018
- Referred By
ASTM D5107-03(2022) - Standard Practice for Preparatory Surface Cleaning of Architectural Sandstone - Effective Date
- 01-Aug-2018
- Effective Date
- 01-Aug-2018
- Effective Date
- 01-Aug-2018
- Referred By
ASTM F3441-23a - Standard Guide for Measurement of pH Below Resilient Flooring Installations - Effective Date
- 01-Aug-2018
- Effective Date
- 01-Aug-2018
- Effective Date
- 01-Aug-2018
- Effective Date
- 01-Aug-2018
- Referred By
ASTM D4261-05(2018) - Standard Practice for Surface Cleaning Concrete Masonry Units for Coating - Effective Date
- 01-Aug-2018
- Effective Date
- 01-Aug-2018
- Effective Date
- 01-Aug-2018
Overview
ASTM D4262-05(2018): Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces establishes procedures for determining the pH of concrete surfaces after chemical cleaning or etching, prior to applying coatings. This standardized method ensures that residual acidic or alkaline chemicals have been effectively removed during surface preparation, safeguarding the performance and adhesion of coatings or linings. The method is widely recognized in the construction, coatings, and concrete preparation industries as a critical step in quality assurance for concrete surface preparation.
Key Topics
- pH Measurement of Concrete Surfaces: The standard defines pH as the measure of acidity or alkalinity, crucial for assessing whether cleaning or etching chemicals have been adequately rinsed.
- Surface Preparation for Coatings: Chemical cleaning and etching prepare concrete for subsequent applications, such as protective coatings or floor finishes.
- Quality Assurance for Coating Adhesion: Residual chemicals left on the surface can compromise the adhesion and performance of coatings. pH testing verifies effective rinsing, ensuring optimal conditions for coating application.
- Safety and Responsibility: The standard highlights the user's obligation to follow all relevant safety, health, and environmental practices and comply with regulatory requirements.
- Test Apparatus and Procedures:
- pH test paper (range 1-11)
- pH pencils (surface measurement, range 0-13)
- Flat electrode pH meters (range 0-14, 0.01 pH increments)
- Acceptance Criteria: The final surface pH should not be more than 1.0 lower or 2.0 higher than the rinse water's pH, unless specified otherwise.
Applications
ASTM D4262 is widely used in multiple scenarios, including:
- Construction and Renovation: Ensuring concrete substrates are suitably neutralized before applying protective coatings or sealants in buildings, bridges, parking structures, and other concrete facilities.
- Industrial Flooring: Verifying surface neutrality prior to installing resinous or epoxy floor coatings, critical for factories, warehouses, and commercial spaces.
- Restoration and Maintenance: Facilitating proper preparation of aged concrete surfaces for recoating or repair, ensuring longevity and adherence of restoration materials.
- Power Generation Facilities: Supporting maintenance protocols for concrete surfaces exposed to severe environments, as overseen by ASTM Committee D33.
Practical benefits of following ASTM D4262 include:
- Reduced coating failures and rework costs
- Enhanced durability and lifespan of applied coatings
- Consistent compliance with project specifications and industry best practices
Related Standards
Professionals referencing ASTM D4262-05(2018) may also find the following standards relevant:
- ASTM D4258: Standard Practice for Surface Cleaning Concrete for Coating
- ASTM D4259: Standard Practice for Abrading Concrete
- ASTM D4285: Standard Test Method for Indicating Oil or Water in Compressed Air
- ASTM D7234: Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
Summary
ASTM D4262-05(2018) provides a reliable and repeatable procedure for testing the pH of chemically cleaned or etched concrete surfaces. This standard is essential for any project where coatings are to be applied to prepared concrete, ensuring optimal adhesion, performance, and service life. Reliable pH testing as described in this standard helps professionals meet industry requirements, enhance project quality, and minimize the risk of premature coating failure.
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DIBt (Deutsches Institut für Bautechnik)
German Institute for Building Technology.
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Frequently Asked Questions
ASTM D4262-05(2018) is a standard published by ASTM International. Its full title is "Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces". This standard covers: SIGNIFICANCE AND USE 3.1 Chemical cleaning and etching is used to prepare concrete for coating. 3.2 Residual chemicals not removed by water rinsing may adversely affect the performance and adhesion of coatings applied over prepared concrete surfaces. It is the intent of this test method to determine that residual chemicals have been removed by measuring the acidity or alkalinity of the final rinsed surface. SCOPE 1.1 This test method covers procedures for determining the acidity or alkalinity of concrete surfaces prepared by chemical cleaning or etching prior to coating. 1.2 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. 1.3 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.
SIGNIFICANCE AND USE 3.1 Chemical cleaning and etching is used to prepare concrete for coating. 3.2 Residual chemicals not removed by water rinsing may adversely affect the performance and adhesion of coatings applied over prepared concrete surfaces. It is the intent of this test method to determine that residual chemicals have been removed by measuring the acidity or alkalinity of the final rinsed surface. SCOPE 1.1 This test method covers procedures for determining the acidity or alkalinity of concrete surfaces prepared by chemical cleaning or etching prior to coating. 1.2 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. 1.3 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.
ASTM D4262-05(2018) is classified under the following ICS (International Classification for Standards) categories: 91.080.40 - Concrete structures. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D4262-05(2018) has the following relationships with other standards: It is inter standard links to ASTM D4262-05(2012), ASTM D5107-03(2022), ASTM C1894-22, ASTM D5295/D5295M-18, ASTM F3441-23a, ASTM E1857-97(2021), ASTM D4260-23, ASTM D6237-19, ASTM D4261-05(2018), ASTM D5498-12a(2018), ASTM D4258-23. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D4262-05(2018) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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: D4262 − 05 (Reapproved 2018)
Standard Test Method for
pH of Chemically Cleaned or Etched Concrete Surfaces
This standard is issued under the fixed designation D4262; 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 test method to determine that residual chemicals have been
removed by measuring the acidity or alkalinity of the final
1.1 This test method covers procedures for determining the
rinsed surface.
acidity or alkalinity of concrete surfaces prepared by chemical
cleaning or etching prior to coating.
4. Apparatus
1.2 This standard does not purport to address all of the
4.1 The specific apparatus for each test is described in
safety concerns, if any, associated with its use. It is the
Annex A1 – Annex A3.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5. Materials
mine the applicability of regulatory limitations prior to use.
5.1 Potable Water, for rinsing chemically cleaned or etched
1.3 This international standard was developed in accor-
concrete surfaces.
dance with internationally recognized principles on standard-
5.2 Wet Concrete Surface, following the final water rinse
ization established in the Decision on Principles for the
and before the rinse water has completely drained off the
Development of International Standards, Guides and Recom-
surface.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
6. Procedure
2. Terminology
6.1 The preparatory actions for each alternative are de-
scribed in Annex A1 – Annex A3.
2.1 Definitions:
2.1.1 pH, n—a measure of acidity or alkalinity of a solution
6.2 At least two surface pH readings shall be taken for each
or surface, with neutrality represented by a value of 7, with
500 square feet or portion thereof. Readings shall be taken at
increasing acidity represented by smaller values, and with
randomly selected locations immediately following the final
increasing alkalinity represented by increasing values.
rinse and before all the rinse water has drained off the surface.
6.3 The pH of the water used for rinsing shall be determined
3. Significance and Use
to establish acceptance criteria. Readings shall be taken at the
3.1 Chemical cleaning and etching is used to prepare
beginning and end of the final rinse.
concrete for coating.
6.4 Unless otherwise specified, tests shall be conducted in
3.2 Residual chemicals not removed by water rinsing may
accordance with this procedure.
adversely affect the performance and adhesion of coatings
applied over prepared concrete surfaces. It is the intent of this 7. Acceptance Criteria
7.1 The pH readings following the final rinse shall not be
more than 1.0 pH lower or 2.0 higher than the pH of the rinse
This test method is under the jurisdiction of ASTM Committee D33 on
ProtectiveCoatingandLiningWorkforPowerGener
...
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