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ASTM

ASTM D4262-05

(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
Chemical cleaning and etching is used to prepare concrete for coating.
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 the procedure for determining the acidity or alkalinity of concrete surfaces prepared by chemical cleaning or etching prior to coatings.  
1.2 This standard does not purport to address all of the safety problems, 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.

General Information

Status
Historical
Publication Date
28-Feb-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
Current Stage
Ref Project

Relations

Replaces
ASTM D4262-83(1999) - Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces
Effective Date
01-Mar-2005
Replaced By
ASTM D4262-05(2012) - Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces
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-Mar-2005
Referred By
ASTM D5295/D5295M-18 - Standard Guide for Preparation of Concrete Surfaces for Adhered (Bonded) Membrane Waterproofing Systems
Effective Date
01-Mar-2005
Referred By
ASTM D5107-03(2022) - Standard Practice for Preparatory Surface Cleaning of Architectural Sandstone
Effective Date
01-Mar-2005
Referred By
ASTM D4258-23 - Standard Practice for Surface Cleaning Concrete for Coating
Effective Date
01-Mar-2005
Referred By
ASTM D6237-19 - Standard Guide for Painting Inspectors (Concrete and Masonry Substrates)
Effective Date
01-Mar-2005
Referred By
ASTM D4261-05(2018) - Standard Practice for Surface Cleaning Concrete Masonry Units for Coating
Effective Date
01-Mar-2005
Referred By
ASTM C1894-22 - Standard Guide for Microbially Induced Corrosion of Concrete Products
Effective Date
01-Mar-2005
Referred By
ASTM E1857-97(2021) - Standard Guide for Selection of Cleaning Techniques for Masonry, Concrete, and Stucco Surfaces
Effective Date
01-Mar-2005
Referred By
ASTM F3441-23a - Standard Guide for Measurement of pH Below Resilient Flooring Installations
Effective Date
01-Mar-2005
Referred By
ASTM D4260-23 - Standard Practice for Liquid and Gelled Acid Etching of Concrete
Effective Date
01-Mar-2005

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ASTM D4262-05 - Standard Test Method for pH of Chemically Cleaned or Etched Concrete SurfacesASTM D4262-05 - Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces
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ASTM D4262-05 - Standard Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces
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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:D4262–05
Standard Test Method for
1
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 4. Apparatus
1.1 This test method covers procedures for determining the 4.1 The specific apparatus for each test is described in
acidity or alkalinity of concrete surfaces prepared by chemical Annex A1-Annex A3.
cleaning or etching prior to coating.
5. Materials
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5.1 Potable Water, for rinsing chemically cleaned or etched
concrete surfaces.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.2 Wet Concrete Surface, following the final water rinse
and before the rinse water has completely drained off the
bility of regulatory limitations prior to use.
surface.
2. Terminology
6. Procedure
2.1 Definitions:
2.1.1 pH, n—a measure of acidity or alkalinity of a solution 6.1 The preparatory actions for each alternative are de-
scribed in Annex A1-Annex A3.
or surface, with neutrality represented by a value of 7, with
increasing acidity represented by smaller values, and with 6.2 At least two surface pH readings shall be taken for each
500 square feet or portion thereof. Readings shall be taken at
increasing alkalinity represented by increasing values.
randomly selected locations immediately following the final
3. Significance and Use
rinse and before all the rinse water has drained off the surface.
3.1 Chemical cleaning and etching is used to prepare 6.3 The pH of the water used for rinsing shall be determined
concrete for coating. to establish acceptance criteria. Readings shall be taken at the
3.2 Residual chemicals not removed by water rinsing may beginning and end of the final rinse.
adversely affect the performance and adhesion of coatings 6.4 Unless otherwise specified, tests shall be conducted in
applied over prepared concrete surfaces. It is the intent of this accordance with this procedure.
test method to determine that residual chemicals have been
7. Acceptance Criteria
removed by measuring the acidity or alkalinity of the final
7.1 The pH readings following the final rinse shall not be
rinsed surface.
more than 1.0 pH lower or 2.0 higher than the pH of the rinse
water unless otherwise specified.
1
This test method is under the jurisdiction of ASTM Committee D33 on
ProtectiveCoatingandLiningWorkforPowerGenerationFacilitiesandisthedirect
8. Keywords
responsibility of Subcommittee D33.05 on Application and Surface Preparation.
Current edi
...

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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.  
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