Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

SCOPE
DESIG: C 309 06 ^TITLE: Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete ^SCOPE: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 through . 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 C 1315.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 , 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.

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ASTM C309-06 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C 309 – 06
Standard Specification for
1
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 (e) 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* 2. Referenced Documents
2
1.1 This specification covers liquid membrane-forming 2.1 ASTM Standards:
compounds suitable for application to concrete surfaces to C 156 Test Method for Water Retention by Liquid
reduce the loss of water during the early-hardening period. Membrane-Forming Curing Compounds for Concrete
White-pigmented membrane-forming compounds serve the C 1315 Specification for Liquid Membrane-Forming Com-
additional purpose of reducing the temperature rise in concrete pounds Having Special Properties for Curing and Sealing
exposed to radiation from the sun. The membrane-forming Concrete
compounds covered by this specification are suitable for use as D56 Test Method for Flash Point byTag Closed CupTester
curing media for fresh concrete, and may also be used for D 869 Test Method for Evaluating Degree of Settling of
further curing of concrete after removal of forms or after initial Paint
moist curing. D 883 Terminology Relating to Plastics
D 1309 Test Method for Settling Properties ofTraffic Paints
NOTE 1—This specification addresses only those properties listed in
During Storage
Sections 5 through 8. Membrane-forming compounds with special prop-
D 2369 Test Method for Volatile Content of Coatings
erties including better water retention, minimum solids content, resistance
to ultraviolet radiation, acid and alkali resistance and non-interference D 3960 Practice for Determining Volatile Organic Com-
with adhesives are described in Specification C 1315.
pound (VOC) Content of Paints and Related Coatings
NOTE 2—Solutions of silicate salts are chemically reactive in concrete
E 1347 Test Method for Color and Color-Difference Mea-
rather than membrane-forming; therefore, they do not meet the intent of
surement by Tristimulus (Filter) Colorimetry
this specification.
3. Classification
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided for
3.1 The following types of liquid membrane-forming com-
informational purposes only.
pounds are included:
1.3 The following precautionary caveat pertains only to the
3.1.1 Type 1—Clear or translucent without dye,
test methods portion, Section 10, of this specification: This
3.1.2 Type 1-D—Clear or translucent with fugitive dye, and
standard does not purport to address all of the safety concerns,
3.1.3 Type 2—White pigmented.
if any, associated with its use. It is the responsibility of the user
3.2 The solids dissolved in the vehicle shall be one of the
of this standard to establish appropriate safety and health
following classes:
practices and determine the applicability of regulatory limita-
3.2.1 Class A—No restrictions,
tions prior to use.
3.2.2 Class B—Must be a resin as defined in Terminology
1.4 The text of this standard references notes and footnotes
D 883.
which provide explanatory material. These notes and footnotes
NOTE 3—Permanent colors other than white, or other special attributes,
shall not be considered as requirements of the standard.
are beyond the scope of this specification and are subject to negotiation
between the purchaser and the supplier.
1
This specification is under the jurisdiction of ASTM Committee C09 on
2
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
C09.22 on Curing Materials. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved June 1, 2006. Published June 2006. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1953. Last previous edition approved in 2003 as C 309 – 03. 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.
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C 309–06
4. Ordering Information catedbysuchacomparisonshallbeconsideredsufficientcause
for rejection of the compound.
4.1 Thepurchasershallincludethefollowinginformationin
the purchase order when applicable:
NOTE 7—Testing for deleterious reactions need only be done for curing
4.1.1 Type of liquid membrane-forming compound and compounds of a new or unknow
...

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