ASTM D4261-05(2018)

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: D4261 − 05 (Reapproved 2018)
Standard Practice for
Surface Cleaning Concrete Masonry Units for Coating
This standard is issued under the fixed designation D4261; 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. Summary of Practice
1.1 This practice covers surface cleaning of concrete ma- 3.1 Surface cleaning is intended to provide a clean,
sonry units to remove dust, dirt, mortar spatter, oil, and grease contamination-free surface suitable for the application of
prior to the application of coatings. Procedures include vacuum coatings.
cleaning, air-blast cleaning, water cleaning, detergent water
3.2 Acceptable surfaces shall be free of dust, dirt, mortar
wash, steam cleaning, and mechanical cleaning.
spatter, oil, grease, and other contaminants. Mortar joints shall
1.2 This practice may alter the surface profile of the be struck flush or tooled with a round jointer and shall be free
concrete but is primarily intended to clean the surface. of rough edges and nibs (see ACI 531.1-76).
1.3 This standard does not purport to address all of the
3.3 Vacuum cleaning, air blast cleaning, water cleaning,
safety concerns, if any, associated with its use. It is the
detergent water wash, steam cleaning, hand tool, and mechani-
responsibility of the user of this standard to establish appro-
cal cleaning are acceptable cleaning methods.
priate safety, health, and environmental practices and deter-
3.4 Any one or a combination of listed cleaning procedures
mine the applicability of regulatory limitations prior to use.
may be used to achieve acceptably cleaned surfaces.
For specific hazard statements, see Section 5.
1.4 This international standard was developed in accor-
4. Significance and Use
dance with internationally recognized principles on standard-
4.1 Surface cleaning is to be used to prepare concrete unit
ization established in the Decision on Principles for the
masonry surfaces for applying coatings intended for light duty
Development of International Standards, Guides and Recom-
service, splash and spillage of water and chemical solutions,
mendations issued by the World Trade Organization Technical
radiation exposure, decontamination, and repeated washdowns
Barriers to Trade (TBT) Committee.
with alkaline cleaners.
2. Referenced Documents
5. Cautions
2.1 ASTM Standards:
5.1 Moisture in concrete unit masonry may be detrimental
D4258 Practice for Surface Cleaning Concrete for Coating
to coating adhesion. Moisture content shall be in compliance
D4262 TestMethodforpHofChemicallyCleanedorEtched
with the coating manufacturer’s recommendations (see Test
Concrete Surfaces
Method D4263 for moisture test method).
D4263 Test Method for Indicating Moisture in Concrete by
the Plastic Sheet Method
6. Procedures
2.2 Other Standard:
6.1 Steam Cleaning—This procedure is intended to remove
ACI 531.1-76 Specification for Concrete Masonry Construc-
heavy deposits of grease and oil, as well as other water soluble
tion
surface contaminants and emulsifiable materials, with a jet of
high pressure steam, in accordance with Practice D4258.
6.2 Detergent Water Wash—This procedure is intended to
This practice is under the jurisdiction of ASTM Committee D33 on Protective
Coating and Lining Work for Power Generation Facilities and is the direct
remove water soluble surface contaminants, oils, grease, and
responsibility of
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