1、Designation:F241911Standard Practice forInstallation of Thick Poured Gypsum ConcreteUnderlayments and Preparation of the Surface to ReceiveResilient Flooring1This standard is issued under the fixed designation F2419;the number immediately following the designation indicates the year oforiginal adopt
2、ion 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 practice covers the installation and preparation ofthe thick poured gypsum
3、concrete underlayments over woodstructural panel subfloors in commercial structures or overconcrete floors in commercial structures and the preparation ofthe thick poured gypsum concrete underlayment surface priorto the installation of resilient flooring in commercial buildings.1.2 This practice cov
4、ers the factors that are required to becontrolled while installing thick poured gypsum concreteunderlayment as a base for resilient flooring.1.3 This practice does not cover the structural adequacy ofthe wood structural panel subfloor or concrete subfloor.Thestructural integrity of assemblies is gov
5、erned by local buildingcodes.1.4 This practice does not supersede in any manner the thickpoured gypsum concrete underlayment manufacturers,adhe-sive manufacturers or resilient flooring manufacturers writteninstructions.Consult the individual manufacturer for specificrecommendations.1.5 Thick poured
6、gypsum concrete underlayments are notsuitable for use on concrete slabs on ground due to potentialmoisture problems arising from moisture intrusion,unless anadequate vapor retarder or vapor barrier is present directlybeneath the concrete subfloor.1.6 The values stated in inch-pound units are to be r
7、egardedas standard.The values stated in parentheses are approximatemathematical conversions to SI units,which are provided forinformation only.1.7 This practice may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associa
8、ted with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C472 Test Methods for Physical Testing of Gypsum,Gyp-sum Plaster
9、s and Gypsum ConcreteD4263 Test Method for Indicating Moisture in Concrete bythe Plastic Sheet MethodF141 Terminology Relating to Resilient Floor CoveringsF1482 Practice for Installation and Preparation of PanelType Underlayments to Receive Resilient Flooring3.Terminology3.1 DefinitionsDefinitions u
10、sed in this practice shall be inaccordance with Terminology F141.3.2 Definitions of Terms Specific to This Standard:3.2.1 fully adhered flooring,nresilient flooring which hasadhesive under the entire product,bonding it to the underlay-ment surface.F14823.2.2 non-fully adhered flooring,nresilient flo
11、oring thatmay be loose laid,in which no adhesive is utilized,or partiallybonded to the surface of the underlayment,typically at seamsand the surrounding perimeter of the product.F14823.2.3 subfloor,nthat wood or concrete structural layerintended to provide support for design loads which may receiver
12、esilient floor coverings directly if the surface is appropriate orindirectly via an underlayment if its surface is not suitable or ifunderlayment is required by appropriate code authorities.3.2.4 gypsum concrete underlayment,nthat layer ofmaterial,with binder content composed primarily of gypsumceme
13、nt and Portland cement that is mixed with sand and water,then pumped and poured in a liquid state to be installed on orover a subfloor to provide a monolithic surface suitable toreceive resilient floor coverings.1This practice is under the jurisdiction of ASTM Committee F06 on ResilientFloor Coverin
14、gs and is the direct responsibility of Subcommittee F06.40 onPractices.Current edition approved June 15,2011.Published July 2011.Originallyapproved in 2005.Last previous edition approved in 2005 as F2419-05.DOI:10.1520/F2419-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcon
15、tact 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,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.5 thickpouredgypsumconcr
16、eteunderlayment,nproducts which are installed in a liquid state over astructurally sound concrete or precast subfloor at a minimum of12in.(13 mm)or a structurally sound wood subfloor at aminimum of34in.(19 mm)which when dry form an integralpart of the floor ceiling assembly for fire resistance and soundratings,satisfy building codes for thick poured gypsum con-crete underlayments,and provide a suitable floor surface forthe installation of resilient floor coverings.3.2.6 sound mat,na membrane ins
