1、Designation: C728 17C728 17aStandard Specification forPerlite Thermal Insulation Board1This standard is issued under the fixed designation C728; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
2、 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 U.S. Department of Defense.1. Scope1.1 This specification covers the composition and physical pro
3、perties for perlite thermal insulation board used principally abovestructural roof decks and as a base for built-up, modified, and elastomeric membrane roofing in building construction.1.2 When adopted by an authority having jurisdiction, codes that address fire properties in many applications regul
4、ate the useof the thermal insulation materials covered by this specification. Fire properties are controlled by job, project, or otherspecifications where codes or government regulations do not apply.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parent
5、heses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriat
6、e safety and health practices and determine the applicability of regulatorylimitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International
7、Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following standards, of the issue in effect on the date of material purchase, form a part of this specification to the extentspecified herein:2.2 AST
8、M Standards:2C165 Test Method for Measuring Compressive Properties of Thermal InsulationsC168 Terminology Relating to Thermal InsulationC177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of theGuarded-Hot-Plate ApparatusC203 Test Methods for Breakin
9、g Load and Flexural Properties of Block-Type Thermal InsulationC209 Test Methods for Cellulosic Fiber Insulating BoardC390 Practice for Sampling and Acceptance of Thermal Insulation LotsC518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter ApparatusC1289 S
10、pecification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation BoardE84 Test Method for Surface Burning Characteristics of Building MaterialsC1763 Test Method for Water Absorption by Immersion of Thermal Insulation Materials3. Terminology3.1 For complete descriptions of terms used in this
11、 specification, refer to Terminology C168.4. Classification4.1 Perlite thermal insulation board is classified as follows:4.1.1 Type 1, Roof Insulation BoardA perlite based roof insulation cover board.1 This specification is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is th
12、e direct responsibility of Subcommittee C16.22 on Organic andNonhomogeneous Inorganic Thermal Insulations.Current edition approved March 1, 2017Sept. 1, 2017. Published April 2017September 2017. Originally approved in 1972. Last previous edition approved in 20162017as C728 16.C728 17. DOI: 10.1520/C
13、0728-17.10.1520/C0728-17A.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standa
14、rd and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases
15、only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.2 Type 2, Roof Cover or Recover BoardThis is used primarily as a field-applied
16、cover board over other roof insulationsor in reroofing applications. The product is also available to manufacturers of laminated rigid foam products as specified inSpecification C1289, Type III.4.1.3 Type 3, Roof Cover or Recover BoardA perlite based cover board that is field applied over other roof
17、 insulations or inre-roofing and recover applications. The product is also available to manufacturers of laminated rigid foam products as specifiedin Specification C1289, Type III.5. Ordering Information5.1 Orders shall at least include the following information:5.1.1 Title and designation Specifica
18、tion C728.5.1.2 Product name, nominal thickness and dimensions.5.1.3 Quantity of material ordered.5.1.4 Manufacturers name, address, and telephone number.6. Materials and Manufacture6.1 CompositionThe basic material of the insulation board shall be perlite expanded by the application of heat to form
19、 glassy,cellular aggregates. The insulation and cover board shall be composed of expanded perlite and fibers formed into rigid, flat,rectangular units with a suitable sizing material incorporated in the product. A facing or coating is potentially present on one orboth surfaces to prevent excessive h
20、ot bitumen strike-in or adhesive absorption during roofing installation.6.2 LaminationThe finished board is either single-ply or multiple-ply. When multiple-ply boards are supplied, a suitableadhesive shall be used to join the plies.7. Physical Properties7.1 Thermal ResistancePerlite thermal insulat
21、ion boards and cover shall conform to the following thermal resistances:Nominal Thicknessin. (mm)Thermal Resistance,Fhft2/btu (Km2/W)Type 1 Type 2 Type 312 (13) 1.4 (0.25) 1.3 (0.23) 1.2 (0.22)34 (19) 2.0 (0.35) . .1 (25) 2.7 (0.48) . .112 (38) 4.1 (0.72) . .2 (51) 5.4 (0.95) . .212 (64) 6.5 (1.1) .
22、 .3 (76) 8.1 (1.4) . .7.1.1 Nominal thickness is the thickness of insulation required to obtain the desired resistance value. It is possible that thenominal thickness will fall outside the thicknesses shown in 7.1. See 8.1 for tolerances.7.1.2 It is acceptable for insulation and cover boards having
23、thermal resistances other than those values listed to be suppliedas agreed upon by purchaser and seller.7.2 The insulation and cover board shall further conform to the physical requirements shown in Table 1.8. Standard Dimensions and Tolerances8.1 The dimensions and tolerances shall conform to those
24、 listed below. it is acceptable for other dimensions to be supplied asagreed upon by purchaser and seller.TABLE 1 Physical RequirementsProperty Units Type 1 Type 2 Type 3Density lb/ft3 (kg/m3) 8 (128) min 10 (160) min 12 (192) minCompressive strength at5 % consolidationpsi (kPa) 20(138) min 20 (138)
25、 min 50 (345) minCompressive strength at10 % deformationpsi (kPa) 30 (207) min 45 (310) min 60 (414) minTensile strength,perpendicularlbf/ft2 (kPa) 575 (27.5) min 800 (38.3) min 1800 (86) minBreak Load Strength lbf (kgf) 6.5 (2.9) min 4.5 (2.0) min 8 (3.6) minFlexural strengthA psi (kPa) 1 in. 50 (3
26、45) min 35 (241) min 65 (448) min$ 1 in. 10 (69) min 5 (34) min 15 (103) minWater absorption volume % 1.5 max 3.5 max 3.5 maxA Minimum flexural strength requirement is based on the calculated value from the minimum required break load strength and the maximum current available thicknessesincluding t
27、he thickness tolerance in 8.1. Reference Test Methods C203 for appropriate calculations.C728 17a2Dimensions, in. (mm) Tolerance, in. (mm)Length, 36 (915), 48 (1220) 72 (1830), 96 (2440) + 14 (6)18 (3)Width, 24 (610), 48 (1220) + 14 (6)18 (3)Thickness, 12 to 3, (13 to 76), incl 116 (1.6)8.1.1 Board s
28、quareness shall be within required tolerance if the two diagonal measurements of the board differ by no more than14 in. (6 mm).8.2 The fabrication of tapered perlite roof insulation board products shall be acceptable if dimension and installationspecifications are agreed upon between buyer and selle
29、r.9. Workmanship, Finish, and Appearance9.1 The surface of the board shall be clean, dry, and free of visual defects that will adversely affect the service quality. Edgesshall be square.10. Sampling10.1 Unless otherwise specified, sampling for qualification and inspection tests, if required, shall b
30、e in accordance with PracticeC390.11. Test Methods11.1 Thermal ResistanceTest Method C177 or C518 at a mean temperature of 75 6 2F (24 6 1C) and a minimumtemperature difference of 40F (22C). In the event of challenge, Test Method C177 shall be the referee method.11.2 Compressive StrengthTest Method
31、C165, Procedure A, at a crosshead speed of 0.05 in./min (1.3 mm/min) for allthicknesses using specimen dimensions of 2 in. (51 mm) length by 2 in. (51 mm) width.11.3 Tensile Strength Perpendicular to the SurfaceSection 12 on Tensile Strength Perpendicular to Surface of Test MethodsC209 using specime
32、n dimensions of 2 in. (51 mm) length by 2 in. (51 mm) width.11.4 Flexural Strength and Break LoadTest Methods C203, Method I, Procedure D, except test at a strain rate of 2 in./minusing 3 in. (76 mm) wide specimens on a 10 in. (254 mm) span.11.5 Flame Spread ClassificationTest Method E84 in the even
33、t that surface burning characteristics are required.11.6 Water AbsorptionTest Methods C1763, Procedure B.11.7 ThicknessThickness section of Test Methods C209.11.8 Oven-Dry DensityMoisture Content and Density section of Test Methods C209.12. Qualification and Inspection12.1 Qualification tests shall
34、be run on the physical requirements given in 7.1 and 7.2.12.2 Inspection requirements are given in 8.1.13. Rejection13.1 Failure to conform to any of the requirements of this specification shall constitute grounds for rejection. In case ofrejection, the seller shall have the right to reinspect the r
35、ejected shipment and resubmit the lot after removal of that portion notconforming to the specified requirements.14. Packaging and Package Marking14.1 PackagingUnless otherwise specified, boards shall be packaged in the manufacturers standard commercial containers.Special packaging shall be provided
36、when agreed to in writing between purchaser and seller.14.2 MarkingUnless otherwise specified, each container shall be plainly marked with the suppliers name, address, telephonenumber, board dimensions, quantity, and the coverage area per container. Additional marking shall be provided when agreed t
37、o inwriting between purchaser and seller.15. Keywords15.1 cover/recover board; laminated rigid foam board; perlite; perlite thermal insulation board; roof insulation; thermalinsulationC728 17a3ASTM International takes no position respecting the validity of any patent rights asserted in connection wi
38、th any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible tech
39、nical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful considerati
40、on at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Har
41、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 17a4
