1、Designation:D708817Standard Practice forResistance to Hydrostatic Pressure for Coatings Used inBelow Grade Applications Applied to Masonry1This standard is issued under the fixed designation D7088;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、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 practice is for the evaluation of coatings used inbelow grade applications to resist the passa
3、ge of water throughconcrete block.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of
4、this standard to establish appro-priate safety and health practices and to determine theapplicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Prin
5、ciples for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D714 Test Method for Evaluating Degree of Blistering ofPaintsD1475 Test Method For Density of Liq
6、uid Coatings,Inks,and Related ProductsD3924 Specification for Environment for Conditioning andTesting Paint,Varnish,Lacquer,and Related Materials(Withdrawn 2016)3D3925 Practice for Sampling Liquid Paints and RelatedPigmented Coatings2.2 U.S.Federal StandardsTT-P-1411A Paint,Copolymer-Resin,Cementiti
7、ous(forWaterproofing Concrete and Masonry Walls)43.Summary of Practice3.1 Commercially available concrete blocks or concretemasonry units,typically 20 by 20 by 20 cm(8 by 8 by 8 in.)in outside dimensions with a hollow inside area(cell)of anominal 10 by 13 by 20 cm(4 by 5 by 8 in.)with a nominalwall
8、thickness of 4 cm(112in.)are coated on all four faceswith the test paint and allowed to cure.Rubber gaskets aresealed to the top and bottom of the test blocks typically with anepoxy or sealant.Water is then used to fill each coated testblock.They are allowed to sit for seven days.Air pressure isthen
9、 introduced and the face of the blocks is evaluated for thesize and frequency of water droplets on the face of the coating,any blistering,loss of adhesion,softening,discoloration orother film irregularities.4.Significance and Use4.1 This test is meant to simulate the ability of a coatingapplied to a
10、 basement or other below grade masonry walls toprevent the intrusion of water through the coating caused byhydrostatic pressure from water on the outside of the structure.5.Apparatus5.1 The metal frame test apparatus used in this practice(SeeFig.1)consists of a series of bolts and wing nuts used for
11、clamping the plate tightly against the gasket and the test block.The top metal plate has an opening in the center into which apipe cap is drilled and tapped to receive an air supply from acompressor tank or hand pump to increase in inside pressure.(See Fig.2.)5.2 The test apparatus typically consist
12、s of the following:5.2.1 Galvanized Steel Top and Bottom Plates,measuring28 by 28 by 0.3 cm(11 by 11 by18in.),each with14in.holesdrilled along the outer edges of the plates for insertion ofscrews and bolts to secure the blocks.There are typically three1This practice is under the jurisdiction of ASTM
13、 Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.47 on Concrete,Stone and Masonry Treatments.Current edition approved June 1,2017.Published July 2017.Originally approvedin 2004.Last previous edition approved in 2008 as D7088 0
14、8 which waswithdrawn January 2017 and reinstated in June 2017.DOI:10.1520/D7088-17.2For 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 on
15、the ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor
16、 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 Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 holes on each side.In addition,the top plate should have a 2.5cm(1 in.)diameter hole in the center for insertion of the
