ASTM C309-98a

Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

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-Sodium silicate solutions are chemically reactive 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.

General Information

• Status: Historical
• Publication Date: 09-Nov-1998
• 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

• Replaced By: ASTM C309-03 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete
• Effective Date: 10-Jul-2003
• Referred By: ASTM C76-22a - Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 10-Nov-1998
• Referred By: ASTM C1433-20e1 - Standard Specification for Precast Reinforced Concrete Monolithic Box Sections for Culverts, Storm Drains, and Sewers
• Effective Date: 10-Nov-1998
• Referred By: ASTM C1932-23 - Standard Specification for Manufacture of Reinforced Precast Concrete End Sections for Pipe
• Effective Date: 10-Nov-1998
• Referred By: ASTM C507-22 - Standard Specification for Reinforced Concrete Elliptical Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 10-Nov-1998
• Referred By: ASTM C76M-22a - Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe (Metric)
• Effective Date: 10-Nov-1998
• Referred By: ASTM C1818-22 - Standard Specification for Synthetic Fiber Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 10-Nov-1998
• Referred By: ASTM C507M-22 - Standard Specification for Reinforced Concrete Elliptical Culvert, Storm Drain, and Sewer Pipe (Metric)
• Effective Date: 10-Nov-1998
• Referred By: ASTM C1433M-22 - Standard Specification for Precast Reinforced Concrete Monolithic Box Sections for Culverts, Storm Drains, and Sewers (Metric)
• Effective Date: 10-Nov-1998
• Referred By: ASTM C506M-22a - Standard Specification for Reinforced Concrete Arch Culvert, Storm Drain, and Sewer Pipe (Metric)
• Effective Date: 10-Nov-1998
• 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: 10-Nov-1998
• Referred By: ASTM C506-22a - Standard Specification for Reinforced Concrete Arch Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 10-Nov-1998
• Referred By: ASTM C361-22 - Standard Specification for Reinforced Concrete Low-Head Pressure Pipe
• Effective Date: 10-Nov-1998
• Referred By: ASTM C478/C478M-22 - Standard Specification for Circular Precast Reinforced Concrete Manhole Sections
• Effective Date: 10-Nov-1998
• Referred By: ASTM C1315-19 - Standard Specification for Liquid Membrane-Forming Compounds Having Special Properties for Curing and Sealing Concrete
• Effective Date: 10-Nov-1998

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: C 309 – 98a
Standard Specification for
Liquid Membrane-Forming Compounds for Curing Concrete
This standard is issued under the fixed designation C 309; 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 Department of Defense.
1. Scope D 869 Test Method for Evaluating Degree of Settling of
Paint
1.1 This specification covers liquid membrane-forming
D 883 Terminology Relating to Plastics
compounds suitable for application to concrete surfaces to
D 1309 Test Method for Settling Properties ofTraffic Paints
reduce the loss of water during the early-hardening period.
During Accelerated Storage
White-pigmented membrane-forming compounds serve the
D 2369 Test Method for Volatile Content of Coatings
additional purpose of reducing the temperature rise in concrete
D 3960 Practice for Determining Volatile Organic Com-
exposed to radiation from the sun. The membrane-forming
pound (VOC) Content of Paints and Related Coatings
compounds covered by this specification are suitable for use as
E 1347 Test Method for Color and Color-Difference Mea-
curing media for fresh concrete, and may also be used for
surement by Tristimulus (Filter) Colorimetry
further curing of concrete after removal of forms or after initial
moist curing.
3. Classification
NOTE 1—Solutions of silicate salts are chemically reactive in concrete
3.1 The following types of liquid membrane-forming com-
rather than membrane-forming; therefore, they do not meet the intent of
pounds are included:
this specification.
3.1.1 Type 1—Clear or translucent without dye,
1.2 The values stated in SI units are to be regarded as the
3.1.2 Type 1-D—Clear or translucent with fugitive dye, and
standard. The values given in parentheses are provided for
3.1.3 Type 2—White pigmented.
informational purposes only.
3.2 The solids dissolved in the vehicle shall be one of the
1.3 The following precautionary caveat pertains only to the
following classes:
test methods portion, Section 10, of this specification: This
3.2.1 Class A—No restrictions,
standard does not purport to address all of the safety concerns,
3.2.2 Class B—Must be a resin as defined in Terminology
if any, associated with its use. It is the responsibility of the user
D 883D 883.
of this standard to establish appropriate safety and health
NOTE 2—Permanent colors other than white, or other special attributes,
practices and determine the applicability of regulatory limita-
are beyond the scope of this specification and are subject to negotiation
tions prior to use.
between the purchaser and the supplier.
1.4 The text of this standard references notes and footnotes
which provide explanatory material. These notes and footnotes
4. Ordering Information
shall not be considered as requirements of the standard.
4.1 Thepurchasershallincludethefollowinginformationin
the purchase order when applicable:
2. Referenced Documents
4.1.1 Type of liquid membrane-forming compound and
2.1 ASTM Standards:
class of solids to be furnished, and
C 156 Test Method forWater Retention by Concrete Curing
4.1.2 Rate of application to be used to determine conform-
Materials
ancetothisspecification.Ifnotspecified,theliquidmembrane-
C 1151 Test Method for Evaluating the Effectiveness of 2
forming material shall be applied at a rate of 5.0 m /L (200
Materials for Curing Concrete
ft /gal) for testing purposes.
D56 Test Method for Flash Point by Tag Closed Tester
NOTE 3—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
This specification is under the jurisdiction of ASTM Committee C-9 on
used for testing, while requiring a substantially greater field application
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
C09.22 on Curing Materials.
Current edition approved Nov. 10, 1998. Published February 1999. Originally
published as C 309 – 53. Last previous edition C 309 – 98. Annual Book of ASTM Standards, Vol 06.02.
2 5
Annual Book of ASTM Standards, Vol 04.02. Annual Book of ASTM Standards, Vol 08.01.
3 6
Annual Book of ASTM Standards, Vol 05.01. Annual Book of ASTM Standards, Vol 06.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
C 309 – 98a
rate on deeply textured surfaces.
5.7 The volatile portion of liquid membrane-forming com-
pounds shall be of materials that are neither toxic, nor have
4.1.3 The intended method of application (for example,
flash points less than 10°C (50°F), when tested in accordance
spraying, brushing, or by roller). If not specified, the material
with 10.6, and shall meet applicable air pollution requirements.
shall be of a sprayable consistency.
Whenrequiredbythepurchaser,themanufacturershallfurnish
4.1.4 Maximum permissible volatile organic compound
the VOC content of the liquid membrane-forming compound.
(VOC) content if required by applicable regulations.
The VOC content shall be determined according to Practice
D 3960D 3960 or as required by the applicable specifications.
5. General Requirements
It is the responsibility of the purchaser to specify and apply the
5.1 Liquid membrane-forming compound Types 1 and 1-D
product in accordance with applicable Federal, state, and local
shall be clear or translucent. Membrane-forming compounds
regulations.
with a fugitive dye (Type 1-D) shall be readily distinguishable
upon the concrete surface for at least 4 h after application but
6. Water Retention Properties
shall become inconspicuous within 7 days after application if
6.1 Liquid membrane-forming compounds, when tested in
exposed to direct sunlight.
accordance with 10.1, shall restrict the loss of water to not
NOTE 4—Nolaboratorytestforthefugitivecharacteristicofthecolorin
more than 0.55 kg/m in 72 h.
dyed (Type 1-D) compounds is provided in this specification. The
disappearance of these colors is strongly dependent on the nature of the
7. Reflectance Properties
exposure and the rate of application of the compounds.
7.1 Type 2 liquid membrane-forming compounds, when
5.2 Type 2 liquid membrane-forming compounds shall con-
tested in accordance with 10.2, shall exhibit a daylight reflec-
sist of finely-divided white pigment and vehicle, ready-mixed
tance of not less than 60 %.
for immediate use as is. The membrane-forming compound
shall present a uniform white appearance when applied uni-
8. Drying Time Requirement
formly to a new concrete surface at the specified rate of
8.1 Liquid membrane-forming compounds, when tested in
application.
accordance with 10.3, shall dry to touch in not more than 4 h.
5.3 Liquid membrane-forming compounds shall be of such
a consistency that they can be readily applied by spraying, or
9. Sampling
by brushing or rolling, when specified, to a uniform coating at
9.1 Samples shall be taken either at the plant or warehouse
temperatures above 4°C (40°F).
prior to delivery, or at the point of delivery, at the option of the
NOTE 5—For uniform application in the field on vertical concrete
purchaser. If sampling is done prior to shipment, the inspector
surfaces, the specified rate of application may be achieved by two coats
representing the purchaser shall have free access to the
applied at an interval of approximately 1 h.
materials being sampled and shall be afforded all reasonable
5.4 Liquid membrane-forming compounds shall adhere to
facilities for inspection and sampling.
freshly placed concrete that has stiffe
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