1、Designation:C30911Standard Specification forLiquid Membrane-Forming Compounds for Curing Concrete1This standard is issued under the fixed designation C309;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.Asuperscript 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*1.1 This specification covers liquid membrane-formingcompounds
3、suitable for application to concrete surfaces toreduce the loss of water during the early-hardening period.White-pigmented membrane-forming compounds serve theadditional purpose of reducing the temperature rise in concreteexposed to radiation from the sun.The membrane-formingcompounds covered by thi
4、s specification are suitable for use ascuring media for fresh concrete,and may also be used forfurther curing of concrete after removal of forms or after initialmoist curing.NOTE1This specification addresses only those properties listed inSections 5 through 8.Membrane-forming compounds with special
5、prop-erties including better water retention,minimum solids content,resistanceto ultraviolet radiation,acid and alkali resistance and non-interferencewith adhesives are described in Specification C1315.NOTE2Solutions of silicate salts are chemically reactive in concreterather than membrane-forming;t
6、herefore,they do not meet the intent ofthis specification.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformational purposes only.1.3 The following precautionary caveat pertains only to thetest methods portion,Section 10,of this
7、 specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.1.4 The t
8、ext of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotesshall not be considered as requirements of the standard.1.5 This is a performance specification.The allowablecomposition of products covered by this specification is limitedby various local
9、,regional,and national regulations.Issuesrelated to air quality(solvent emission),worker exposure,andother hazards are not addressed here.It is the responsibility ofthe producers and users of these materials to comply withpertinent regulations.WarningSome VOC exempt solvents used to meet theregulati
10、ons are extremely flammable with low auto ignitiontemperatures and rapid evaporation rates.Consult the manu-facturers product information sheet for important applicationand safety information.2.Referenced Documents2.1 ASTM Standards:2C156 Test Method for Water Loss from a Mortar SpecimenThrough Liqu
11、id Membrane-Forming Curing Compoundsfor ConcreteC1315 Specification for Liquid Membrane-Forming Com-pounds Having Special Properties for Curing and SealingConcreteD869 Test Method for Evaluating Degree of Settling of PaintD883 Terminology Relating to PlasticsD1309 Test Method for Settling Properties
12、 of Traffic PaintsDuring StorageD2369 Test Method for Volatile Content of CoatingsE1347 Test Method for Color and Color-Difference Mea-surement by Tristimulus Colorimetry3.Classification3.1 The following types of liquid membrane-forming com-pounds are included:3.1.1 Type 1Clear or translucent withou
13、t dye,3.1.2 Type 1-DClear or translucent with fugitive dye,and3.1.3 Type 2White pigmented.3.2 The solids dissolved in the vehicle shall be one of thefollowing classes:3.2.1 Class ANo restrictions,3.2.2 Class BMust be a resin as defined in TerminologyD883.1This specification is under the jurisdiction
14、 of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.22 on Materials Applied to New Concrete Surfaces.Current edition approved June 1,2011.Published June 2011.Originallyapproved in 1953.Last previous edition approved in 2007 as C30907.DOI:10.15
15、20/C0309-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of th
16、is standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE3Permanent colors other than white,or other special attributes,are beyond the scope of this specification and are subject to negotiationbetween the purchaser and the supplier.4.Ordering Information4.1 The purchaser shall include the following information inthe purchase order when applicable:4.1.1 Type of liquid membrane-forming compound andclass of solids to be furnished,a
