ASTM C309-19

Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

ABSTRACT
This specification covers liquid membrane-forming compounds suitable for application to concrete surfaces to reduce the loss of water during the early-hardening period. White-pigmented membrane-forming compounds serve the additional purpose of reducing the temperature rise in concrete exposed to radiation from the sun. The membrane-forming compounds covered by this specification are suitable for use as curing media for fresh concrete, and may also be used for further curing of concrete after removal of forms or after initial moist curing. Liquid membrane-forming compound types 1 and 1-D shall be clear or translucent. Type 2 liquid membrane-forming compounds shall consist of finely-divided white pigment and vehicle, ready-mixed for immediate use as is. Liquid membrane-forming compounds, when tested, shall restrict the loss of water not more than the requirements prescribed. Type 2 liquid membrane-forming compounds, when tested, shall exhibit a daylight reflectance of not less than 60 %. Liquid membrane-forming compounds, when tested, shall dry to touch in not more than 4 h.
SCOPE
1.1 This specification covers liquid membrane-forming compounds suitable for application to concrete surfaces to reduce the loss of water during the early-hardening period. White-pigmented membrane-forming compounds serve the additional purpose of reducing the temperature rise in concrete exposed to radiation from the sun. The membrane-forming compounds covered by this specification are suitable for use as curing media for fresh concrete, and may also be used for further curing of concrete after removal of forms or after initial moist curing.  
Note 1: This specification addresses only those properties listed in Sections 6 through 9. Membrane-forming compounds with special properties including better water retention, minimum solids content, resistance to ultraviolet radiation, acid and alkali resistance and non-interference with adhesives are described in Specification C1315.
Note 2: Solutions of silicate salts are chemically reactive in concrete rather than membrane-forming; therefore, they do not meet the intent of this specification.  
1.2 This is a performance specification. The allowable composition of products covered by this specification is limited by various local, regional, and national regulations. Issues related to air quality (solvent emission), worker exposure, and other hazards are not addressed here. It is the responsibility of the producers and users of these materials to comply with pertinent regulations.  
1.3 Warning—Some VOC exempt solvents used to meet the regulations are extremely flammable with low auto ignition temperatures and rapid evaporation rates. Consult the manufacturer's product information sheet for important application and safety information.  
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes shall not be considered as requirements of the standard.  
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for informational purposes only.  
1.6 The following precautionary caveat pertains only to the test methods portion, Section 11, of this specification: 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.  
1.7 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: 14-Jun-2019
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.22 - Materials Applied to New Concrete Surfaces

Relations

• Refers: ASTM C125-15 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Feb-2015
• Refers: ASTM C125-15a - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Jul-2015
• Refers: ASTM C125-15b - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 15-Dec-2015
• Refers: ASTM C125-16 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 15-Dec-2016
• Refers: ASTM C125-18 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Jan-2018
• Refers: ASTM C125-18a - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Jul-2018
• Refers: ASTM D883-17 - Standard Terminology Relating to Plastics
• Effective Date: 15-Aug-2017
• Refers: ASTM D883-18 - Standard Terminology Relating to Plastics
• Effective Date: 01-Nov-2018
• Refers: ASTM D883-18a - Standard Terminology Relating to Plastics
• Effective Date: 01-Dec-2018
• Refers: ASTM C125-18b - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Oct-2018
• Refers: ASTM D883-19 - Standard Terminology Relating to Plastics
• Effective Date: 01-Feb-2019
• Refers: ASTM D883-19a - Standard Terminology Relating to Plastics
• Effective Date: 15-Apr-2019
• Refers: ASTM D883-19c - Standard Terminology Relating to Plastics
• Effective Date: 01-Aug-2019
• Refers: ASTM C125-19 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Jan-2019
• Refers: ASTM C125-19a - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 15-Dec-2019
• Refers: ASTM D883-20 - Standard Terminology Relating to Plastics
• Effective Date: 01-Jan-2020
• Refers: ASTM E1347-06(2015) - Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
• Effective Date: 01-Nov-2015
• Refers: ASTM E1347-06(2020) - Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
• Effective Date: 01-May-2020
• Refers: ASTM D1309-93(2015) - Standard Test Method for Settling Properties of Traffic Paints During Storage (Withdrawn 2020)
• Effective Date: 01-Jun-2015
• Refers: ASTM D2369-10(2015)e1 - Standard Test Method for Volatile Content of Coatings
• Effective Date: 01-Jun-2015
• Refers: ASTM C125-14 - Standard Terminology Relating to Concrete and Concrete Aggregates
• Effective Date: 01-Aug-2014
• Referred By: ASTM C1846/C1846M-19 - Standard Specification for Performance Based Manufacture of Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 15-Jun-2019
• Referred By: ASTM C506-22a - Standard Specification for Reinforced Concrete Arch Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 15-Jun-2019
• Referred By: ASTM C915-79(2018) - Standard Specification for Precast Reinforced Concrete Crib Wall Members
• Effective Date: 15-Jun-2019
• Referred By: ASTM C76-22a - Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 15-Jun-2019
• Referred By: ASTM C507M-22 - Standard Specification for Reinforced Concrete Elliptical Culvert, Storm Drain, and Sewer Pipe (Metric)
• Effective Date: 15-Jun-2019
• Referred By: ASTM C14-20 - Standard Specification for Nonreinforced Concrete Sewer, Storm Drain, and Culvert Pipe
• Effective Date: 15-Jun-2019
• Referred By: ASTM C14M-20 - Standard Specification for Nonreinforced Concrete Sewer, Storm Drain, and Culvert Pipe (Metric)
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1932-23 - Standard Specification for Manufacture of Reinforced Precast Concrete End Sections for Pipe
• Effective Date: 15-Jun-2019
• Referred By: ASTM C935-19 - Standard Specification for General Requirements for Prestressed Concrete Poles Statically Cast
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1786-19 - Standard Specification for Segmental Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers Designed According to AASHTO LRFD
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1433-20e1 - Standard Specification for Precast Reinforced Concrete Monolithic Box Sections for Culverts, Storm Drains, and Sewers
• Effective Date: 15-Jun-2019
• Referred By: ASTM C361M-22 - Standard Specification for Reinforced Concrete Low-Head Pressure Pipe (Metric)
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1315-19 - Standard Specification for Liquid Membrane-Forming Compounds Having Special Properties for Curing and Sealing Concrete
• Effective Date: 15-Jun-2019
• Referred By: ASTM C361-22 - Standard Specification for Reinforced Concrete Low-Head Pressure Pipe
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1818-22 - Standard Specification for Synthetic Fiber Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 15-Jun-2019
• Referred By: ASTM C76M-22a - Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe (Metric)
• Effective Date: 15-Jun-2019
• Referred By: ASTM C506M-22a - Standard Specification for Reinforced Concrete Arch Culvert, Storm Drain, and Sewer Pipe (Metric)
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1577-20e1 - Standard Specification for Precast Reinforced Concrete Monolithic Box Sections for Culverts, Storm Drains, and Sewers Designed According to AASHTO LRFD
• Effective Date: 15-Jun-2019
• Referred By: ASTM F2551-09(2023) - Standard Practice for Installing a Protective Cementitious Liner System in Sanitary Sewer Manholes
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1504M-20 - Standard Specification for Manufacture of Precast Reinforced Concrete Three-Sided Structures for Culverts and Storm Drains (Metric)
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1903-21 - Standard Specification for Precast Concrete Duct Bank
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1504-20 - Standard Specification for Manufacture of Precast Reinforced Concrete Three-Sided Structures for Culverts and Storm Drains
• Effective Date: 15-Jun-2019
• Referred By: ASTM C1433M-22 - Standard Specification for Precast Reinforced Concrete Monolithic Box Sections for Culverts, Storm Drains, and Sewers (Metric)
• Effective Date: 15-Jun-2019
• Referred By: ASTM C478/C478M-22 - Standard Specification for Circular Precast Reinforced Concrete Manhole Sections
• Effective Date: 15-Jun-2019
• Referred By: ASTM C507-22 - Standard Specification for Reinforced Concrete Elliptical Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 15-Jun-2019

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:C309 −19
Standard Specification for
1
Liquid Membrane-Forming Compounds for Curing Concrete
This standard is issued under the fixed designation C309; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 1.5 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided for
1.1 This specification covers liquid membrane-forming
informational purposes only.
compounds suitable for application to concrete surfaces to
1.6 The following precautionary caveat pertains only to the
reduce the loss of water during the early-hardening period.
test methods portion, Section 11, of this specification: This
White-pigmented membrane-forming compounds serve the
standard does not purport to address all of the safety concerns,
additional purpose of reducing the temperature rise in concrete
if any, associated with its use. It is the responsibility of the user
exposed to radiation from the sun. The membrane-forming
of this standard to establish appropriate safety, health, and
compounds covered by this specification are suitable for use as
environmental practices and determine the applicability of
curing media for fresh concrete, and may also be used for
regulatory limitations prior to use.
further curing of concrete after removal of forms or after initial
1.7 This international standard was developed in accor-
moist curing.
dance with internationally recognized principles on standard-
NOTE 1—This specification addresses only those properties listed in
ization established in the Decision on Principles for the
Sections 6 through 9. Membrane-forming compounds with special prop-
Development of International Standards, Guides and Recom-
erties including better water retention, minimum solids content, resistance
mendations issued by the World Trade Organization Technical
to ultraviolet radiation, acid and alkali resistance and non-interference
Barriers to Trade (TBT) Committee.
with adhesives are described in Specification C1315.
NOTE 2—Solutions of silicate salts are chemically reactive in concrete
2. Referenced Documents
rather than membrane-forming; therefore, they do not meet the intent of
2
this specification.
2.1 ASTM Standards:
C125 Terminology Relating to Concrete and Concrete Ag-
1.2 This is a performance specification. The allowable
gregates
compositionofproductscoveredbythisspecificationislimited
C156 Test Method forWater Loss [from a Mortar Specimen]
by various local, regional, and national regulations. Issues
Through Liquid Membrane-Forming Curing Compounds
related to air quality (solvent emission), worker exposure, and
for Concrete
other hazards are not addressed here. It is the responsibility of
C1315 Specification for Liquid Membrane-Forming Com-
the producers and users of these materials to comply with
pounds Having Special Properties for Curing and Sealing
pertinent regulations.
Concrete
1.3 Warning—Some VOC exempt solvents used to meet
D869 TestMethodforEvaluatingDegreeofSettlingofPaint
the regulations are extremely flammable with low auto ignition
D883 Terminology Relating to Plastics
temperatures and rapid evaporation rates. Consult the manu-
D1309 Test Method for Settling Properties of Traffic Paints
facturer’s product information sheet for important application
During Storage
and safety information.
D2369 Test Method for Volatile Content of Coatings
E1347 Test Method for Color and Color-Difference Mea-
1.4 The text of this standard references notes and footnotes
surement by Tristimulus Colorimetry
which provide explanatory material. These notes and footnotes
shall not be considered as requirements of the standard.
3. Terminology
3.1 For definitions of terms used in this specification, refer
to Terminology C125.
1
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee
2
C09.22 on Materials Applied to New Concrete Surfaces. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 15, 2019. Published August 2019. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1953. Last previous edition approved in 2011 as C309–11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0309-19. the ASTM websi
...

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: C309 − 11 C309 − 19
Standard Specification for
1
Liquid Membrane-Forming Compounds for Curing Concrete
This standard is issued under the fixed designation C309; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers liquid membrane-forming compounds suitable for application to concrete surfaces to reduce the
loss of water during the early-hardening period. White-pigmented membrane-forming compounds serve the additional purpose of
reducing the temperature rise in concrete exposed to radiation from the sun. The membrane-forming compounds covered by this
specification are suitable for use as curing media for fresh concrete, and may also be used for further curing of concrete after
removal of forms or after initial moist curing.
NOTE 1—This specification addresses only those properties listed in Sections 56 through 89. Membrane-forming compounds with special properties
including better water retention, minimum solids content, resistance to ultraviolet radiation, acid and alkali resistance and non-interference with adhesives
are described in Specification C1315.
NOTE 2—Solutions of silicate salts are chemically reactive in concrete rather than membrane-forming; therefore, they do not meet the intent of this
specification.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for
informational purposes only.
1.3 The following precautionary caveat pertains only to the test methods portion, Section 10, of this specification: 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.
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes shall
not be considered as requirements of the standard.
1.2 This is a performance specification. The allowable composition of products covered by this specification is limited by
various local, regional, and national regulations. Issues related to air quality (solvent emission), worker exposure, and other hazards
are not addressed here. It is the responsibility of the producers and users of these materials to comply with pertinent regulations.
Warning—Some VOC exempt solvents used to meet the regulations are extremely flammable with low auto ignition
temperatures and rapid evaporation rates. Consult the manufacturer’s product information sheet for important application and
safety information.
1.3 Warning—Some VOC exempt solvents used to meet the regulations are extremely flammable with low auto ignition
temperatures and rapid evaporation rates. Consult the manufacturer’s product information sheet for important application and
safety information.
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes shall
not be considered as requirements of the standard.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for
informational purposes only.
1.6 The following precautionary caveat pertains only to the test methods portion, Section 11, of this specification: 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
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee C09.22 on
Materials Applied to New Concrete Surfaces.
Current edition approved June 1, 2011June 15, 2019. Published June 2011August 2019. Originally approved in 1953. Last previous edition approved in 20072011 as
C309–07.–11. DOI: 10.1520/C0309-11.10.1520/C0309-19.
*A Summary of Changes section appears at the end of this standard
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