1、Designation:D842522Standard Guide for theUse of Sodium Bentonite Needle-Punched GeotextileWaterproofing Systems with Cast-in-Place Concrete Below-Grade Foundation Construction1This standard is issued under the fixed designation D8425;the number immediately following the designation indicates the yea
2、r oforiginal adoption or,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 guide covers general installation guidelines ofwaterproof
3、ing membranes produced as a composite of sodiumbentonite contained within two interlocked needle-punchedgeotextiles for designers to consider when developing project-specific drawings and specifications.This guide covers con-struction applications where the waterproofing is applied to thepositive si
4、de of below-grade cast-in-place concrete foundationwalls,both backfilled and support of excavation(SOE)construction,and under concrete pressure slabs.This guidedoes not cover plaza deck construction applications,eithersplit-slab construction or pavers on pedestals,or vegetatedgreen roof waterproofin
5、g applications.1.2 This guide does not cover sodium bentonite waterproof-ing membranes produced with a corrugation paper carrier,bentonite bonded to a geomembrane,and spray-applied ben-tonite systems.1.3 For the purpose of this guide,concrete is assumed to becast-in-place with a surface profile as r
6、ecommended in GuideD5295/D5295M,consolidated in accordance with applicableguidelines in ACI 309,structurally sound,able to accept theweight of anticipated loads,and meets the local building coderequirements.All components of the waterproofing system areassumed to comply with any federal,state,and lo
7、cal environ-mental regulations that may be in effect at the time ofinstallation.Expansion joints,insulation,and drainage layersare beyond the scope of this guide.1.4 This guide does not cover sodium bentonite geotextilemembranes installed on below-grade foundation walls andslabs constructed with mas
8、onry materials,precast concrete,orpneumatically applied concrete(that is,shotcrete).1.5 The values stated in SI units are to be regarded asstandard.The unit values given in parentheses are for referenceinformation only.1.6 Different sodium bentonite geotextile membranes havedifferent materials of co
9、mposition and construction which canaffect physical properties.The procedures contained in thisguide,therefore,may not be universally applicable to allsodium bentonite geotextile membranes under all field condi-tions.1.7 This guide does not purport to assign responsibilities ofquality assurance or q
10、uality control.Specific quality assuranceand quality control items should be addressed in projectspecifications and contract documents.1.8 This guide does not purport to include requirements forwarranties associated with the waterproofing materials orinstallation.1.9 This guide does not purport to i
11、nclude all detailingtechniques to address various conditions that can be encoun-tered on construction projects.1.10 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
12、,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.11 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Int
13、ernational Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1079 Terminology Relating to Roofing and WaterproofingD4439 Terminology for GeosyntheticsD5295/D5295M Guide for Preparation of C
14、oncrete Surfacesfor Adhered(Bonded)Membrane Waterproofing SystemsD6294/D6294M Test Method for Corrosion Resistance of1This guide is under the jurisdiction of ASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.22 on Water-proofing and Dampproofing Syst
15、ems.Current edition approved Aug.1,2022.Published August 2022.DOI:10.1520/D8425-22.2For 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
16、the ASTM website.Copyright ASTM International,100 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 Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1Ferrous Metal Fastener Assemblies Used in Roofing andWaterpr
