1、Designation:D648999(Reapproved 2020)Standard Test Method forDetermining the Water Absorption of Hardened ConcreteTreated With a Water Repellent Coating1This standard is issued under the fixed designation D6489;the number immediately following the designation indicates the year oforiginal adoption or
2、,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method provides a procedure for the determi-nation of the water absorption b
3、y a core of concrete taken froma surface treated with a water repellent.1.2 The intended use of the water repellent coating is toreduce the amount of water that absorbs into the substrate.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for info
4、rmationonly.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior
5、 to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarr
6、iers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteD1193 Specification for Reagent WaterD1763 Specification for Epoxy ResinsD3924 Specification for Standard Environment for Condi-tioning and Tes
7、ting Paint,Varnish,Lacquer,and RelatedMaterialsE145 Specification for Gravity-Convection and Forced-Ventilation OvensE898 Practice for Calibration of Non-Automatic WeighingInstruments3.Summary of Test Method3.1 The specimen is dried to a constant weight and theportions of the specimen not treated wi
8、th the water repellentare sealed with an impervious sealing material.The specimensare weighed and immersed in water.The specimens areremoved from the water,weighed,and a percent water absorp-tion is calculated.4.Significance and Use4.1 Researchers in the field of water repellent coatings haverecogni
9、zed the need for a standardized test for determining theperformance of water repellents applied to structures in thefield.Many coating manufacturers supply warranties for theirproducts based on maintaining a specific water repellency onconcrete.This test method can be used to determine theeffective
10、water repellency of the coating by comparing itsperformance to a control uncoated specimen.5.Apparatus and Materials5.1 Balance,having a capacity of not less than 4000 g(8.81lb)and a sensitivity of 0.1 g(0.0002 lb)as tested in accordancewith Test Method E898.5.2 Hot Plate,capable of at least 149C(30
11、0F).5.3 Metal Pan,at least 20.3 cm long by 15.2 cm wide and5.1 cm deep(8 in.long by 6 in.wide and 2 in.deep),suitableto melt the wax or mix the epoxy.5.4 Brush,Duck Tape.5.5 Container,suitable for holding the water to immerse thespecimens.5.6 Forced Draft Oven,Type IIA or IIB,as defined inSpecificat
12、ion E145.5.7 Reagent Water,as defined by Type IV of SpecificationD1193.5.8 Sealing Material,having very low permeability towater.Sealing material must meet the requirements of Section6.NOTE1Sealing materials that in general meet the requirements that1This test method is under the jurisdiction of AST
13、M Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.47 on Concrete,Stone and Masonry Treatments.Current edition approved Dec.1,2020.Published December 2020.Originallyapproved in 1999.Last previous edition approved in 2012 as D64
14、89 99(2012).DOI:10.1520/D6489-99R20.2For 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.Copyright ASTM International,1
15、00 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom
16、mendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1are defined in Specification D1763,Type I,Grade 1,(two componentepoxies,epichlorohydrin/Bisphenol A and polyamine+Bisphenol A)orwaxes used in the investment casting industry.Paraffin waxes are notacceptable.6.Sealing Material6.1 Use hardened concrete specimens as described in 7.1.6.2 Follow the procedures of Section 8,except for 8.4 and8.5.Instead use the sealing material to completely seal thespecimen,t
