ASTM C309-19
(Specification)Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete
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
- Technical Committee
- C09 - Concrete and Concrete Aggregates
- Drafting Committee
- C09.22 - Materials Applied to New Concrete Surfaces
Relations
- Replaces
ASTM C309-11 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete - Effective Date
- 15-Jun-2019
- Effective Date
- 01-Feb-2024
- Effective Date
- 01-Feb-2024
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-May-2020
- Effective Date
- 01-Jan-2020
- Effective Date
- 15-Dec-2019
- Effective Date
- 01-Aug-2019
- Effective Date
- 15-Apr-2019
- Effective Date
- 01-Feb-2019
- Effective Date
- 01-Jan-2019
- Effective Date
- 01-Dec-2018
- Effective Date
- 01-Nov-2018
- Effective Date
- 01-Oct-2018
- Effective Date
- 01-Jul-2018
Overview
ASTM C309-19: Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete establishes the requirements for liquid membrane-forming compounds applied to concrete surfaces. These compounds are designed to reduce water loss during the critical early-hardening period of concrete, ensuring proper curing and strength development. The specification includes both clear/translucent and white-pigmented curing compounds suitable for fresh concrete or for continued curing after the removal of forms or following initial moist curing.
The standard addresses the performance requirements of curing compounds, but leaves selection of specific chemistry and compliance with local regulations-such as volatile organic compound (VOC) content and worker safety-to manufacturers and users.
Key Topics
- Reduction of Water Loss: Specifies the ability of membrane-forming compounds to restrict water evaporation from concrete surfaces during curing.
- Compound Types:
- Type 1: Clear or translucent, without dye.
- Type 1-D: Clear or translucent, containing fugitive dye for application visibility.
- Type 2: White-pigmented, enhancing reflectivity to lower the temperature rise from sunlight exposure.
- Performance Testing:
- Compounds must meet water retention levels as determined by ASTM C156.
- Type 2 compounds must display a daylight reflectance of not less than 60% as tested per ASTM E1347.
- Products must dry to the touch within 4 hours to be suitable for construction schedules.
- Physical and Storage Requirements:
- Uniform application capability by spraying, brushing, or rolling.
- Minimum storage stability of 6 months and ease of remixing for white-pigmented products.
- Safety Considerations:
- VOC exempt solvents may be used, but some are extremely flammable. Manufacturers’ safety recommendations must be heeded.
- Scope Limitations:
- The standard focuses on basic water retention and reflectance properties; other specialized attributes (e.g., higher resistance to UV, alkalis, or compatibility with adhesives) are addressed in ASTM C1315.
Applications
ASTM C309-certified curing compounds are primarily used in construction and infrastructure projects involving freshly placed concrete, such as:
- Pavements, bridges, highways, and airport runways
- Commercial and industrial floors
- Precast concrete elements
- Residential building foundations and slabs
The use of liquid membrane-forming curing compounds helps:
- Ensure uniform curing by minimizing rapid water loss
- Enhance final concrete strength, durability, and finish quality
- Protect new concrete from temperature-related cracking or dusting
- Facilitate curing in projects where traditional moist curing methods are impractical
White-pigmented compounds (Type 2) are particularly valuable in exterior applications exposed to direct sunlight, as their reflectivity helps control surface temperature and reduces thermal cracking.
Related Standards
- ASTM C1315: Specification for liquid membrane-forming compounds with enhanced properties (UV, chemical resistance, etc.) beyond basic curing.
- ASTM C125: Terminology relevant to concrete and aggregates (referenced for definitions).
- ASTM C156: Test method for water loss through membrane-forming curing compounds.
- ASTM E1347: Test method for measuring color and reflectance of membrane compounds.
- ASTM D869 and D1309: Methods for evaluating settling and storage stability.
- ASTM D2369: Method for determining volatile content in coatings.
By following ASTM C309-19, concrete professionals can improve project outcomes, achieve consistent curing results, and meet industry and regulatory requirements for the use of liquid membrane-forming curing compounds.
Buy Documents
ASTM C309-19 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete
REDLINE ASTM C309-19 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete
Get Certified
Connect with accredited certification bodies for this standard
ICC Evaluation Service
Building products evaluation and certification.
QAI Laboratories
Building and construction product testing and certification.
Aboma Certification B.V.
Specialized in construction, metal, and transport sectors.
Sponsored listings
Frequently Asked Questions
ASTM C309-19 is a technical specification published by ASTM International. Its full title is "Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete". This standard covers: 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.
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.
ASTM C309-19 is classified under the following ICS (International Classification for Standards) categories: 91.100.30 - Concrete and concrete products. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C309-19 has the following relationships with other standards: It is inter standard links to ASTM C309-11, ASTM D883-24, ASTM D2369-24, ASTM D883-23, ASTM E1347-06(2020), ASTM D883-20, ASTM C125-19a, ASTM D883-19c, ASTM D883-19a, ASTM D883-19, ASTM C125-19, ASTM D883-18a, ASTM D883-18, ASTM C125-18b, ASTM C125-18a. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C309-19 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:C309 −19
Standard Specification for
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
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.
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. 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 service@astm.org. 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 website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C309−19
surfaces, the specified rate of application may be achieved by two coats
4. Classification
applied at an interval of approximately 1 h.
4.1 The following types of liquid membrane-forming com-
6.4 Liquid membrane-forming compounds shall adhere to
pounds are included:
freshly placed concrete that has stiffened or set sufficiently to
4.1.1 Type 1—Clear or translucent without dye,
resist marring during application, and to damp, hardened
4.1.2 Type 1-D—Clear or translucent with fugitive dye, and
concrete, and shall form a continuous film when applied at the
4.1.3 Type 2—White pigmented.
specified rate of application.
4.2 The solids dissolved in the vehicle shall be one of the
6.5 Liquid membrane-forming compounds shall not react
following classes:
deleteriously with concrete. Deleterious reactions are detected
4.2.1 Class A—No restrictions,
by scratching the surface of a mortar specimen (used for the
4.2.2 Class B—Must be a resin as defined in Terminology
water-retention test) with a knife or screwdriver, not less than
D883.
72hafterapplication,andcomparingwiththesurfacehardness
NOTE 3—Permanent colors other than white, or other special attributes,
similarly determined of a similar specimen that has been
are beyond the scope of this specification and are subject to negotiation
moist-cured for approximately half as long. Any softening of
between the purchaser and the supplier.
the liquid membrane-forming compound-treated surface indi-
cated by such a comparison shall be considered sufficient cause
5. Ordering Information
for rejection of the compound.
5.1 Thepurchasershallincludethefollowinginformationin
the purchase order when applicable: NOTE 7—Testing for deleterious reactions need only be done for curing
compounds of a new or unknown composition.
5.1.1 Type of liquid membrane-forming compound and
class of solids to be furnished, and
6.6 Liquid membrane-forming compounds shall be storable
5.1.2 Rate of application to be used to determine confor-
for at least 6 months without deterioration, except compounds
mance to this specification. If not specified, the liquid
of the water-emulsion type will not be expected to resist
membrane-forming material shall be applied at a rate of 5.0
freezing. Type 2 liquid membrane-forming compounds shall
2 2
m /L (200 ft /gal) for testing purposes.
not settle out excessively or cake in the container, and shall be
capable of being mixed to a uniform consistency by moderate
NOTE 4—The application rate used for testing may, or may not, be the
stirring or agitation. When tested for long-term settling, as
same as the rate to be used for field application. Many agencies use the
same rate for field application on relatively smooth surfaces as the rate statedin11.4,thecompoundshallhavearatingofnotlessthan
used for testing, while requiring a substantially greater field application
four.
rate on deeply textured surfaces.
7. Water Loss Properties
5.1.3 The intended method of application (for example,
spraying, brushing, or by roller). If not specified, the material
7.1 Liquid
...
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
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.
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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C309 − 19
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.
2. Referenced Documents
2.1 ASTM Standards:
C125 Terminology Relating to Concrete and Concrete Aggregates
C156 Test Method for Water Loss [from a Mortar Specimen] Through Liquid Membrane-Forming Curing Compounds for
Concrete
C1315 Specification for Liquid Membrane-Forming Compounds Having Special Properties for Curing and Sealing Concrete
D869 Test Method for Evaluating Degree of Settling of Paint
D883 Terminology Relating to Plastics
D1309 Test Method for Settling Properties of Traffic Paints During Storage
D2369 Test Method for Volatile Content of Coatings
E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
3. Terminology
3.1 For definitions of terms used in this specification, refer to Terminology C125.
4. Classification
4.1 The following types of liquid membrane-forming compounds are included:
4.1.1 Type 1—Clear or translucent without dye,
4.1.2 Type 1-D—Clear or translucent with fugitive dye, and
4.1.3 Type 2—White pigmented.
4.2 The solids dissolved in the vehicle shall be one of the following classes:
4.2.1 Class A—No restrictions,
4.2.2 Class B—Must be a resin as defined in Terminology D883.
NOTE 3—Permanent colors other than white, or other special attributes, are beyond the scope of this specification and are subject to negotiation between
the purchaser and the supplier.
5. Ordering Information
5.1 The purchaser shall include the following information in the purchase order when applicable:
5.1.1 Type of liquid membrane-forming compound and class of solids to be furnished, and
5.1.2 Rate of application to be used to determine conformance to this specification. If not specified, the liquid membrane-
2 2
forming material shall be applied at a rate of 5.0 m /L (200 ft /gal) for testing purposes.
NOTE 4—The application rate used for testing may, or may not, be the same as the rate to be used for field application. Many agencies use the same
rate for field application on relatively smooth surfaces as the rate used for testing, while requiring a substantially greater field application rate on deeply
textured surfaces.
5.1.3 The intended method of application (for example, spraying, brushing, or by roller). If not specified, the material shall be
of a sprayable consistency.
5.1.4 Maximum permissible volatile organic compound (VOC) content if required by applicable regulations.
6. General Requirements
6.1 Liquid membrane-forming compound Types 1 and 1-D shall be clear or translucent. Membrane-forming compounds with
a fugitive dye (Type 1-D) shall be readily distinguishable upon the concrete surface for at least 4 h after application but shall
become inconspicuous within 7 days after application if exposed to direct sunlight.
NOTE 5—No laboratory test for the fugitive characteristic of the color in dyed (Type 1-D) compounds is provided in this specification. The
disappearance of these colors is strongly dependent on the nature of the exposure and the rate of application of the compounds.
6.2 Type 2 liquid membrane-forming compounds shall consist of finely-divided white pigment and vehicle, ready-mixed for
immediate use as is. The membrane-forming compound shall present a uniform white appearance when applied uniformly to a new
concrete surface at the specified rate of application.
6.3 Liquid membrane-forming compounds shall be of such a consistency that they can be readily applied by spraying, or by
brushing or rolling, when specified, to a uniform coating at temperatures above 4 °C (40 °F).
For referenced ASTM standards, visit th
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...